[PATCH 0/8] MR7848: server: Use events as a sync for several objects.

[Rémi Bernon]

Instead of https://gitlab.winehq.org/wine/wine/-/merge_requests/7815, for https://gitlab.winehq.org/wine/wine/-/merge_requests/7226, this only split the sync ops to a separate vtable and let objects delegate theirs to a separate object.

This starts using a event-like interface for most objects, leaving the decision regarding if/how to split sync themselves / integrate inproc syncs for later.

-- 
https://gitlab.winehq.org/wine/wine/-/merge_requests/7848

[PATCH 1/8] server: Split object sync related vtable.

[Rémi Bernon]

From: Rémi Bernon <rbernon(a)codeweavers.com>

---
 server/async.c      | 19 +++++------
 server/atom.c       |  5 ---
 server/change.c     | 11 ++----
 server/clipboard.c  |  5 ---
 server/completion.c | 26 +++++++++-----
 server/console.c    | 83 +++++++++++++++++++++++++--------------------
 server/debugger.c   | 26 +++++++++-----
 server/device.c     | 30 ++++++----------
 server/directory.c  | 10 ------
 server/event.c      | 26 +++++++++-----
 server/fd.c         | 40 +++++++++++-----------
 server/file.c       | 13 +++----
 server/file.h       |  4 ++-
 server/handle.c     |  5 ---
 server/hook.c       |  5 ---
 server/mailslot.c   | 23 ++-----------
 server/mapping.c    | 15 --------
 server/mutex.c      | 13 ++++---
 server/named_pipe.c | 49 +++++---------------------
 server/object.c     | 20 +++++------
 server/object.h     | 27 ++++++++++-----
 server/process.c    | 39 ++++++++++++++-------
 server/queue.c      | 18 +++++-----
 server/registry.c   |  5 ---
 server/request.c    |  5 ---
 server/semaphore.c  | 13 ++++---
 server/serial.c     |  7 +---
 server/signal.c     |  5 ---
 server/sock.c       | 16 +--------
 server/symlink.c    |  5 ---
 server/thread.c     | 53 ++++++++++++++++++-----------
 server/timer.c      | 13 ++++---
 server/token.c      |  5 ---
 server/window.c     |  5 ---
 server/winstation.c | 10 ------
 35 files changed, 288 insertions(+), 366 deletions(-)

diff --git a/server/async.c b/server/async.c
index d2d929c9709..46ce1e3b6bc 100644
--- a/server/async.c
+++ b/server/async.c
@@ -70,16 +70,20 @@ static int async_signaled( struct object *obj, struct wait_queue_entry *entry );
 static void async_satisfied( struct object * obj, struct wait_queue_entry *entry );
 static void async_destroy( struct object *obj );
 
-static const struct object_ops async_ops =
+static const struct sync_ops async_sync_ops =
 {
-    sizeof(struct async),      /* size */
-    &no_type,                  /* type */
-    async_dump,                /* dump */
     add_queue,                 /* add_queue */
     remove_queue,              /* remove_queue */
     async_signaled,            /* signaled */
     async_satisfied,           /* satisfied */
     no_signal,                 /* signal */
+};
+
+static const struct object_ops async_ops =
+{
+    sizeof(struct async),      /* size */
+    &no_type,                  /* type */
+    async_dump,                /* dump */
     no_get_fd,                 /* get_fd */
     default_map_access,        /* map_access */
     default_get_sd,            /* get_sd */
@@ -261,7 +265,7 @@ struct async *create_async( struct fd *fd, struct thread *thread, const struct a
         if (event) release_object( event );
         return NULL;
     }
-
+    async->obj.sync.ops  = &async_sync_ops;
     async->thread        = (struct thread *)grab_object( thread );
     async->event         = event;
     async->data          = *data;
@@ -695,11 +699,6 @@ static const struct object_ops iosb_ops =
     sizeof(struct iosb),      /* size */
     &no_type,                 /* type */
     iosb_dump,                /* dump */
-    no_add_queue,             /* add_queue */
-    NULL,                     /* remove_queue */
-    NULL,                     /* signaled */
-    NULL,                     /* satisfied */
-    no_signal,                /* signal */
     no_get_fd,                /* get_fd */
     default_map_access,       /* map_access */
     default_get_sd,           /* get_sd */
diff --git a/server/atom.c b/server/atom.c
index ff0799f5880..04feea060fc 100644
--- a/server/atom.c
+++ b/server/atom.c
@@ -76,11 +76,6 @@ static const struct object_ops atom_table_ops =
     sizeof(struct atom_table),    /* size */
     &no_type,                     /* type */
     atom_table_dump,              /* dump */
-    no_add_queue,                 /* add_queue */
-    NULL,                         /* remove_queue */
-    NULL,                         /* signaled */
-    NULL,                         /* satisfied */
-    no_signal,                    /* signal */
     no_get_fd,                    /* get_fd */
     default_map_access,           /* map_access */
     default_get_sd,               /* get_sd */
diff --git a/server/change.c b/server/change.c
index f42ce066340..31fa33f2e96 100644
--- a/server/change.c
+++ b/server/change.c
@@ -109,11 +109,6 @@ static const struct object_ops dir_ops =
     sizeof(struct dir),       /* size */
     &file_type,               /* type */
     dir_dump,                 /* dump */
-    add_queue,                /* add_queue */
-    remove_queue,             /* remove_queue */
-    default_fd_signaled,      /* signaled */
-    no_satisfied,             /* satisfied */
-    no_signal,                /* signal */
     dir_get_fd,               /* get_fd */
     default_map_access,       /* map_access */
     dir_get_sd,               /* get_sd */
@@ -1137,10 +1132,8 @@ struct object *create_dir_obj( struct fd *fd, unsigned int access, mode_t mode )
 {
     struct dir *dir;
 
-    dir = alloc_object( &dir_ops );
-    if (!dir)
-        return NULL;
-
+    if (!(dir = alloc_object( &dir_ops ))) return NULL;
+    dir->obj.sync.ops = &default_fd_sync_ops;
     list_init( &dir->change_records );
     dir->filter = 0;
     dir->notified = 0;
diff --git a/server/clipboard.c b/server/clipboard.c
index 91f159bc7c9..814d3c8f901 100644
--- a/server/clipboard.c
+++ b/server/clipboard.c
@@ -73,11 +73,6 @@ static const struct object_ops clipboard_ops =
     sizeof(struct clipboard),     /* size */
     &no_type,                     /* type */
     clipboard_dump,               /* dump */
-    no_add_queue,                 /* add_queue */
-    NULL,                         /* remove_queue */
-    NULL,                         /* signaled */
-    NULL,                         /* satisfied */
-    no_signal,                    /* signal */
     no_get_fd,                    /* get_fd */
     default_map_access,           /* map_access */
     default_get_sd,               /* get_sd */
diff --git a/server/completion.c b/server/completion.c
index 99680ae0680..ad257a57f4d 100644
--- a/server/completion.c
+++ b/server/completion.c
@@ -84,16 +84,20 @@ static int completion_wait_signaled( struct object *obj, struct wait_queue_entry
 static void completion_wait_satisfied( struct object *obj, struct wait_queue_entry *entry );
 static void completion_wait_destroy( struct object * );
 
-static const struct object_ops completion_wait_ops =
+static const struct sync_ops completion_wait_sync_ops =
 {
-    sizeof(struct completion_wait), /* size */
-    &no_type,                       /* type */
-    completion_wait_dump,           /* dump */
     add_queue,                      /* add_queue */
     remove_queue,                   /* remove_queue */
     completion_wait_signaled,       /* signaled */
     completion_wait_satisfied,      /* satisfied */
     no_signal,                      /* signal */
+};
+
+static const struct object_ops completion_wait_ops =
+{
+    sizeof(struct completion_wait), /* size */
+    &no_type,                       /* type */
+    completion_wait_dump,           /* dump */
     no_get_fd,                      /* get_fd */
     default_map_access,             /* map_access */
     default_get_sd,                 /* get_sd */
@@ -158,16 +162,20 @@ static int completion_signaled( struct object *obj, struct wait_queue_entry *ent
 static int completion_close_handle( struct object *obj, struct process *process, obj_handle_t handle );
 static void completion_destroy( struct object * );
 
-static const struct object_ops completion_ops =
+static const struct sync_ops completion_sync_ops =
 {
-    sizeof(struct completion), /* size */
-    &completion_type,          /* type */
-    completion_dump,           /* dump */
     add_queue,                 /* add_queue */
     remove_queue,              /* remove_queue */
     completion_signaled,       /* signaled */
     no_satisfied,              /* satisfied */
     no_signal,                 /* signal */
+};
+
+static const struct object_ops completion_ops =
+{
+    sizeof(struct completion), /* size */
+    &completion_type,          /* type */
+    completion_dump,           /* dump */
     no_get_fd,                 /* get_fd */
     default_map_access,        /* map_access */
     default_get_sd,            /* get_sd */
@@ -250,6 +258,7 @@ static struct completion_wait *create_completion_wait( struct thread *thread )
     struct completion_wait *wait;
 
     if (!(wait = alloc_object( &completion_wait_ops ))) return NULL;
+    wait->obj.sync.ops = &completion_wait_sync_ops;
     wait->completion = NULL;
     wait->thread = thread;
     wait->msg = NULL;
@@ -271,6 +280,7 @@ static struct completion *create_completion( struct object *root, const struct u
     {
         if (get_error() != STATUS_OBJECT_NAME_EXISTS)
         {
+            completion->obj.sync.ops = &completion_sync_ops;
             list_init( &completion->queue );
             list_init( &completion->wait_queue );
             completion->depth = 0;
diff --git a/server/console.c b/server/console.c
index de6f4e73e31..e0fb85e8cc5 100644
--- a/server/console.c
+++ b/server/console.c
@@ -76,16 +76,20 @@ static struct object *console_open_file( struct object *obj, unsigned int access
                                          unsigned int sharing, unsigned int options );
 static int console_add_queue( struct object *obj, struct wait_queue_entry *entry );
 
-static const struct object_ops console_ops =
+static const struct sync_ops console_sync_ops =
 {
-    sizeof(struct console),           /* size */
-    &file_type,                       /* type */
-    console_dump,                     /* dump */
     console_add_queue,                /* add_queue */
     remove_queue,                     /* remove_queue */
     console_signaled,                 /* signaled */
     no_satisfied,                     /* satisfied */
     no_signal,                        /* signal */
+};
+
+static const struct object_ops console_ops =
+{
+    sizeof(struct console),           /* size */
+    &file_type,                       /* type */
+    console_dump,                     /* dump */
     console_get_fd,                   /* get_fd */
     default_map_access,               /* map_access */
     default_get_sd,                   /* get_sd */
@@ -153,16 +157,20 @@ static struct object *console_server_lookup_name( struct object *obj, struct uni
 static struct object *console_server_open_file( struct object *obj, unsigned int access,
                                                 unsigned int sharing, unsigned int options );
 
-static const struct object_ops console_server_ops =
+static const struct sync_ops console_server_sync_ops =
 {
-    sizeof(struct console_server),    /* size */
-    &file_type,                       /* type */
-    console_server_dump,              /* dump */
     add_queue,                        /* add_queue */
     remove_queue,                     /* remove_queue */
     console_server_signaled,          /* signaled */
     no_satisfied,                     /* satisfied */
     no_signal,                        /* signal */
+};
+
+static const struct object_ops console_server_ops =
+{
+    sizeof(struct console_server),    /* size */
+    &file_type,                       /* type */
+    console_server_dump,              /* dump */
     console_server_get_fd,            /* get_fd */
     default_map_access,               /* map_access */
     default_get_sd,                   /* get_sd */
@@ -222,16 +230,20 @@ static struct fd *screen_buffer_get_fd( struct object *obj );
 static struct object *screen_buffer_open_file( struct object *obj, unsigned int access,
                                                unsigned int sharing, unsigned int options );
 
-static const struct object_ops screen_buffer_ops =
+static const struct sync_ops screen_buffer_sync_ops =
 {
-    sizeof(struct screen_buffer),     /* size */
-    &file_type,                       /* type */
-    screen_buffer_dump,               /* dump */
     add_queue,                        /* add_queue */
     remove_queue,                     /* remove_queue */
     screen_buffer_signaled,           /* signaled */
     no_satisfied,                     /* satisfied */
     no_signal,                        /* signal */
+};
+
+static const struct object_ops screen_buffer_ops =
+{
+    sizeof(struct screen_buffer),     /* size */
+    &file_type,                       /* type */
+    screen_buffer_dump,               /* dump */
     screen_buffer_get_fd,             /* get_fd */
     default_map_access,               /* map_access */
     default_get_sd,                   /* get_sd */
@@ -276,11 +288,6 @@ static const struct object_ops console_device_ops =
     sizeof(struct object),            /* size */
     &device_type,                     /* type */
     console_device_dump,              /* dump */
-    no_add_queue,                     /* add_queue */
-    NULL,                             /* remove_queue */
-    NULL,                             /* signaled */
-    no_satisfied,                     /* satisfied */
-    no_signal,                        /* signal */
     no_get_fd,                        /* get_fd */
     default_map_access,               /* map_access */
     default_get_sd,                   /* get_sd */
@@ -310,16 +317,20 @@ static struct object *console_input_open_file( struct object *obj, unsigned int
 static struct fd *console_input_get_fd( struct object *obj );
 static void console_input_destroy( struct object *obj );
 
-static const struct object_ops console_input_ops =
+static const struct sync_ops console_input_sync_ops =
 {
-    sizeof(struct console_input),     /* size */
-    &device_type,                     /* type */
-    console_input_dump,               /* dump */
     add_queue,                        /* add_queue */
     remove_queue,                     /* remove_queue */
     console_input_signaled,           /* signaled */
     no_satisfied,                     /* satisfied */
     no_signal,                        /* signal */
+};
+
+static const struct object_ops console_input_ops =
+{
+    sizeof(struct console_input),     /* size */
+    &device_type,                     /* type */
+    console_input_dump,               /* dump */
     console_input_get_fd,             /* get_fd */
     default_map_access,               /* map_access */
     default_get_sd,                   /* get_sd */
@@ -369,16 +380,20 @@ static struct object *console_output_open_file( struct object *obj, unsigned int
                                                 unsigned int sharing, unsigned int options );
 static void console_output_destroy( struct object *obj );
 
-static const struct object_ops console_output_ops =
+static const struct sync_ops console_output_sync_ops =
 {
-    sizeof(struct console_output),    /* size */
-    &device_type,                     /* type */
-    console_output_dump,              /* dump */
     add_queue,                        /* add_queue */
     remove_queue,                     /* remove_queue */
     console_output_signaled,          /* signaled */
     no_satisfied,                     /* satisfied */
     no_signal,                        /* signal */
+};
+
+static const struct object_ops console_output_ops =
+{
+    sizeof(struct console_output),    /* size */
+    &device_type,                     /* type */
+    console_output_dump,              /* dump */
     console_output_get_fd,            /* get_fd */
     default_map_access,               /* map_access */
     default_get_sd,                   /* get_sd */
@@ -432,11 +447,6 @@ static const struct object_ops console_connection_ops =
     sizeof(struct console_connection),/* size */
     &device_type,                     /* type */
     console_connection_dump,          /* dump */
-    no_add_queue,                     /* add_queue */
-    NULL,                             /* remove_queue */
-    NULL,                             /* signaled */
-    no_satisfied,                     /* satisfied */
-    no_signal,                        /* signal */
     console_connection_get_fd,        /* get_fd */
     default_map_access,               /* map_access */
     default_get_sd,                   /* get_sd */
@@ -535,9 +545,8 @@ static struct object *create_console(void)
 {
     struct console *console;
 
-    if (!(console = alloc_object( &console_ops )))
-        return NULL;
-
+    if (!(console = alloc_object( &console_ops ))) return NULL;
+    console->obj.sync.ops  = &console_sync_ops;
     console->renderer      = NULL;
     console->signaled      = 0;
     console->active        = NULL;
@@ -641,9 +650,8 @@ static struct object *create_screen_buffer( struct console *console )
         return NULL;
     }
 
-    if (!(screen_buffer = alloc_object( &screen_buffer_ops )))
-        return NULL;
-
+    if (!(screen_buffer = alloc_object( &screen_buffer_ops ))) return NULL;
+    screen_buffer->obj.sync.ops = &screen_buffer_sync_ops;
     screen_buffer->id    = ++console->last_id;
     screen_buffer->input = console;
     init_async_queue( &screen_buffer->ioctl_q );
@@ -957,6 +965,7 @@ static struct object *create_console_server( void )
     struct console_server *server;
 
     if (!(server = alloc_object( &console_server_ops ))) return NULL;
+    server->obj.sync.ops = &console_server_sync_ops;
     server->console    = NULL;
     server->busy       = 0;
     server->once_input = 0;
@@ -1337,6 +1346,7 @@ static struct object *console_device_lookup_name( struct object *obj, struct uni
 
         name->len = 0;
         if (!(console_input = alloc_object( &console_input_ops ))) return NULL;
+        console_input->obj.sync.ops = &console_input_sync_ops;
         console_input->fd = alloc_pseudo_fd( &console_input_fd_ops, &console_input->obj,
                                              FILE_SYNCHRONOUS_IO_NONALERT );
         if (!console_input->fd)
@@ -1361,6 +1371,7 @@ static struct object *console_device_lookup_name( struct object *obj, struct uni
 
         name->len = 0;
         if (!(console_output = alloc_object( &console_output_ops ))) return NULL;
+        console_output->obj.sync.ops = &console_output_sync_ops;
         console_output->fd = alloc_pseudo_fd( &console_output_fd_ops, &console_output->obj,
                                              FILE_SYNCHRONOUS_IO_NONALERT );
         if (!console_output->fd)
diff --git a/server/debugger.c b/server/debugger.c
index 39a740e07e5..09c17712d17 100644
--- a/server/debugger.c
+++ b/server/debugger.c
@@ -78,16 +78,20 @@ static void debug_event_dump( struct object *obj, int verbose );
 static int debug_event_signaled( struct object *obj, struct wait_queue_entry *entry );
 static void debug_event_destroy( struct object *obj );
 
-static const struct object_ops debug_event_ops =
+static const struct sync_ops debug_event_sync_ops =
 {
-    sizeof(struct debug_event),    /* size */
-    &no_type,                      /* type */
-    debug_event_dump,              /* dump */
     add_queue,                     /* add_queue */
     remove_queue,                  /* remove_queue */
     debug_event_signaled,          /* signaled */
     no_satisfied,                  /* satisfied */
     no_signal,                     /* signal */
+};
+
+static const struct object_ops debug_event_ops =
+{
+    sizeof(struct debug_event),    /* size */
+    &no_type,                      /* type */
+    debug_event_dump,              /* dump */
     no_get_fd,                     /* get_fd */
     default_map_access,            /* map_access */
     default_get_sd,                /* get_sd */
@@ -106,16 +110,20 @@ static void debug_obj_dump( struct object *obj, int verbose );
 static int debug_obj_signaled( struct object *obj, struct wait_queue_entry *entry );
 static void debug_obj_destroy( struct object *obj );
 
-static const struct object_ops debug_obj_ops =
+static const struct sync_ops debug_obj_sync_ops =
 {
-    sizeof(struct debug_obj),      /* size */
-    &debug_obj_type,               /* type */
-    debug_obj_dump,                /* dump */
     add_queue,                     /* add_queue */
     remove_queue,                  /* remove_queue */
     debug_obj_signaled,            /* signaled */
     no_satisfied,                  /* satisfied */
     no_signal,                     /* signal */
+};
+
+static const struct object_ops debug_obj_ops =
+{
+    sizeof(struct debug_obj),      /* size */
+    &debug_obj_type,               /* type */
+    debug_obj_dump,                /* dump */
     no_get_fd,                     /* get_fd */
     default_map_access,            /* map_access */
     default_get_sd,                /* get_sd */
@@ -359,6 +367,7 @@ static struct debug_obj *create_debug_obj( struct object *root, const struct uni
     {
         if (get_error() != STATUS_OBJECT_NAME_EXISTS)
         {
+            debug_obj->obj.sync.ops = &debug_obj_sync_ops;
             debug_obj->flags = flags;
             list_init( &debug_obj->event_queue );
         }
@@ -427,6 +436,7 @@ static struct debug_event *alloc_debug_event( struct thread *thread, int code, c
 
     /* build the event */
     if (!(event = alloc_object( &debug_event_ops ))) return NULL;
+    event->obj.sync.ops = &debug_event_sync_ops;
     event->state     = EVENT_QUEUED;
     event->sender    = (struct thread *)grab_object( thread );
     event->file      = NULL;
diff --git a/server/device.c b/server/device.c
index 1f93cca437d..13a6728939b 100644
--- a/server/device.c
+++ b/server/device.c
@@ -63,11 +63,6 @@ static const struct object_ops irp_call_ops =
     sizeof(struct irp_call),          /* size */
     &no_type,                         /* type */
     irp_call_dump,                    /* dump */
-    no_add_queue,                     /* add_queue */
-    NULL,                             /* remove_queue */
-    NULL,                             /* signaled */
-    NULL,                             /* satisfied */
-    no_signal,                        /* signal */
     no_get_fd,                        /* get_fd */
     default_map_access,               /* map_access */
     default_get_sd,                   /* get_sd */
@@ -98,16 +93,20 @@ static void device_manager_dump( struct object *obj, int verbose );
 static int device_manager_signaled( struct object *obj, struct wait_queue_entry *entry );
 static void device_manager_destroy( struct object *obj );
 
-static const struct object_ops device_manager_ops =
+static const struct sync_ops device_manager_sync_ops =
 {
-    sizeof(struct device_manager),    /* size */
-    &no_type,                         /* type */
-    device_manager_dump,              /* dump */
     add_queue,                        /* add_queue */
     remove_queue,                     /* remove_queue */
     device_manager_signaled,          /* signaled */
     no_satisfied,                     /* satisfied */
     no_signal,                        /* signal */
+};
+
+static const struct object_ops device_manager_ops =
+{
+    sizeof(struct device_manager),    /* size */
+    &no_type,                         /* type */
+    device_manager_dump,              /* dump */
     no_get_fd,                        /* get_fd */
     default_map_access,               /* map_access */
     default_get_sd,                   /* get_sd */
@@ -160,11 +159,6 @@ static const struct object_ops device_ops =
     sizeof(struct device),            /* size */
     &device_type,                     /* type */
     device_dump,                      /* dump */
-    no_add_queue,                     /* add_queue */
-    NULL,                             /* remove_queue */
-    NULL,                             /* signaled */
-    no_satisfied,                     /* satisfied */
-    no_signal,                        /* signal */
     no_get_fd,                        /* get_fd */
     default_map_access,               /* map_access */
     default_get_sd,                   /* get_sd */
@@ -212,11 +206,6 @@ static const struct object_ops device_file_ops =
     sizeof(struct device_file),       /* size */
     &file_type,                       /* type */
     device_file_dump,                 /* dump */
-    add_queue,                        /* add_queue */
-    remove_queue,                     /* remove_queue */
-    default_fd_signaled,              /* signaled */
-    no_satisfied,                     /* satisfied */
-    no_signal,                        /* signal */
     device_file_get_fd,               /* get_fd */
     default_map_access,               /* map_access */
     default_get_sd,                   /* get_sd */
@@ -429,7 +418,7 @@ static struct object *device_open_file( struct object *obj, unsigned int access,
     struct unicode_str nt_name;
 
     if (!(file = alloc_object( &device_file_ops ))) return NULL;
-
+    file->obj.sync.ops = &default_fd_sync_ops;
     file->device = (struct device *)grab_object( device );
     file->closed = 0;
     list_init( &file->kernel_object );
@@ -825,6 +814,7 @@ static struct device_manager *create_device_manager(void)
 
     if ((manager = alloc_object( &device_manager_ops )))
     {
+        manager->obj.sync.ops = &device_manager_sync_ops;
         manager->current_call = NULL;
         list_init( &manager->devices );
         list_init( &manager->requests );
diff --git a/server/directory.c b/server/directory.c
index fd689c561bc..6abd7e5c238 100644
--- a/server/directory.c
+++ b/server/directory.c
@@ -66,11 +66,6 @@ static const struct object_ops object_type_ops =
     sizeof(struct object_type),   /* size */
     &objtype_type,                /* type */
     object_type_dump,             /* dump */
-    no_add_queue,                 /* add_queue */
-    NULL,                         /* remove_queue */
-    NULL,                         /* signaled */
-    NULL,                         /* satisfied */
-    no_signal,                    /* signal */
     no_get_fd,                    /* get_fd */
     default_map_access,           /* map_access */
     default_get_sd,               /* get_sd */
@@ -116,11 +111,6 @@ static const struct object_ops directory_ops =
     sizeof(struct directory),     /* size */
     &directory_type,              /* type */
     directory_dump,               /* dump */
-    no_add_queue,                 /* add_queue */
-    NULL,                         /* remove_queue */
-    NULL,                         /* signaled */
-    NULL,                         /* satisfied */
-    no_signal,                    /* signal */
     no_get_fd,                    /* get_fd */
     default_map_access,           /* map_access */
     default_get_sd,               /* get_sd */
diff --git a/server/event.c b/server/event.c
index ad7c09acc99..f9aa2d6244d 100644
--- a/server/event.c
+++ b/server/event.c
@@ -64,16 +64,20 @@ static void event_satisfied( struct object *obj, struct wait_queue_entry *entry
 static int event_signal( struct object *obj, unsigned int access);
 static struct list *event_get_kernel_obj_list( struct object *obj );
 
-static const struct object_ops event_ops =
+static const struct sync_ops event_sync_ops =
 {
-    sizeof(struct event),      /* size */
-    &event_type,               /* type */
-    event_dump,                /* dump */
     add_queue,                 /* add_queue */
     remove_queue,              /* remove_queue */
     event_signaled,            /* signaled */
     event_satisfied,           /* satisfied */
     event_signal,              /* signal */
+};
+
+static const struct object_ops event_ops =
+{
+    sizeof(struct event),      /* size */
+    &event_type,               /* type */
+    event_dump,                /* dump */
     no_get_fd,                 /* get_fd */
     default_map_access,        /* map_access */
     default_get_sd,            /* get_sd */
@@ -111,16 +115,20 @@ struct keyed_event
 static void keyed_event_dump( struct object *obj, int verbose );
 static int keyed_event_signaled( struct object *obj, struct wait_queue_entry *entry );
 
-static const struct object_ops keyed_event_ops =
+static const struct sync_ops keyed_event_sync_ops =
 {
-    sizeof(struct keyed_event),  /* size */
-    &keyed_event_type,           /* type */
-    keyed_event_dump,            /* dump */
     add_queue,                   /* add_queue */
     remove_queue,                /* remove_queue */
     keyed_event_signaled,        /* signaled */
     no_satisfied,                /* satisfied */
     no_signal,                   /* signal */
+};
+
+static const struct object_ops keyed_event_ops =
+{
+    sizeof(struct keyed_event),  /* size */
+    &keyed_event_type,           /* type */
+    keyed_event_dump,            /* dump */
     no_get_fd,                   /* get_fd */
     default_map_access,          /* map_access */
     default_get_sd,              /* get_sd */
@@ -147,6 +155,7 @@ struct event *create_event( struct object *root, const struct unicode_str *name,
         if (get_error() != STATUS_OBJECT_NAME_EXISTS)
         {
             /* initialize it if it didn't already exist */
+            event->obj.sync.ops = &event_sync_ops;
             list_init( &event->kernel_object );
             event->manual_reset = manual_reset;
             event->signaled     = initial_state;
@@ -233,6 +242,7 @@ struct keyed_event *create_keyed_event( struct object *root, const struct unicod
         if (get_error() != STATUS_OBJECT_NAME_EXISTS)
         {
             /* initialize it if it didn't already exist */
+            event->obj.sync.ops = &keyed_event_sync_ops;
         }
     }
     return event;
diff --git a/server/fd.c b/server/fd.c
index bb0e90d99d0..b9366ee69e0 100644
--- a/server/fd.c
+++ b/server/fd.c
@@ -157,18 +157,23 @@ struct fd
 };
 
 static void fd_dump( struct object *obj, int verbose );
+static int default_fd_signaled( struct object *obj, struct wait_queue_entry *entry );
 static void fd_destroy( struct object *obj );
 
+const struct sync_ops default_fd_sync_ops =
+{
+    add_queue,                    /* add_queue */
+    remove_queue,                 /* remove_queue */
+    default_fd_signaled,          /* signaled */
+    no_satisfied,                 /* satisfied */
+    no_signal,                    /* signal */
+};
+
 static const struct object_ops fd_ops =
 {
     sizeof(struct fd),        /* size */
     &no_type,                 /* type */
     fd_dump,                  /* dump */
-    no_add_queue,             /* add_queue */
-    NULL,                     /* remove_queue */
-    NULL,                     /* signaled */
-    NULL,                     /* satisfied */
-    no_signal,                /* signal */
     no_get_fd,                /* get_fd */
     default_map_access,       /* map_access */
     default_get_sd,           /* get_sd */
@@ -205,11 +210,6 @@ static const struct object_ops device_ops =
     sizeof(struct device),    /* size */
     &no_type,                 /* type */
     device_dump,              /* dump */
-    no_add_queue,             /* add_queue */
-    NULL,                     /* remove_queue */
-    NULL,                     /* signaled */
-    NULL,                     /* satisfied */
-    no_signal,                /* signal */
     no_get_fd,                /* get_fd */
     default_map_access,       /* map_access */
     default_get_sd,           /* get_sd */
@@ -245,11 +245,6 @@ static const struct object_ops inode_ops =
     sizeof(struct inode),     /* size */
     &no_type,                 /* type */
     inode_dump,               /* dump */
-    no_add_queue,             /* add_queue */
-    NULL,                     /* remove_queue */
-    NULL,                     /* signaled */
-    NULL,                     /* satisfied */
-    no_signal,                /* signal */
     no_get_fd,                /* get_fd */
     default_map_access,       /* map_access */
     default_get_sd,           /* get_sd */
@@ -282,16 +277,20 @@ struct file_lock
 static void file_lock_dump( struct object *obj, int verbose );
 static int file_lock_signaled( struct object *obj, struct wait_queue_entry *entry );
 
-static const struct object_ops file_lock_ops =
+static const struct sync_ops file_lock_sync_ops =
 {
-    sizeof(struct file_lock),   /* size */
-    &no_type,                   /* type */
-    file_lock_dump,             /* dump */
     add_queue,                  /* add_queue */
     remove_queue,               /* remove_queue */
     file_lock_signaled,         /* signaled */
     no_satisfied,               /* satisfied */
     no_signal,                  /* signal */
+};
+
+static const struct object_ops file_lock_ops =
+{
+    sizeof(struct file_lock),   /* size */
+    &no_type,                   /* type */
+    file_lock_dump,             /* dump */
     no_get_fd,                  /* get_fd */
     default_map_access,         /* map_access */
     default_get_sd,             /* get_sd */
@@ -1422,6 +1421,7 @@ static struct file_lock *add_lock( struct fd *fd, int shared, file_pos_t start,
     struct file_lock *lock;
 
     if (!(lock = alloc_object( &file_lock_ops ))) return NULL;
+    lock->obj.sync.ops = &file_lock_sync_ops;
     lock->shared  = shared;
     lock->start   = start;
     lock->end     = end;
@@ -2170,7 +2170,7 @@ int check_fd_events( struct fd *fd, int events )
 }
 
 /* default signaled() routine for objects that poll() on an fd */
-int default_fd_signaled( struct object *obj, struct wait_queue_entry *entry )
+static int default_fd_signaled( struct object *obj, struct wait_queue_entry *entry )
 {
     struct fd *fd = get_obj_fd( obj );
     int ret = fd->signaled;
diff --git a/server/file.c b/server/file.c
index 8f6566a0077..666b1a6f55e 100644
--- a/server/file.c
+++ b/server/file.c
@@ -91,11 +91,6 @@ static const struct object_ops file_ops =
     sizeof(struct file),          /* size */
     &file_type,                   /* type */
     file_dump,                    /* dump */
-    add_queue,                    /* add_queue */
-    remove_queue,                 /* remove_queue */
-    default_fd_signaled,          /* signaled */
-    no_satisfied,                 /* satisfied */
-    no_signal,                    /* signal */
     file_get_fd,                  /* get_fd */
     default_map_access,           /* map_access */
     file_get_sd,                  /* get_sd */
@@ -145,7 +140,7 @@ struct file *create_file_for_fd( int fd, unsigned int access, unsigned int shari
         close( fd );
         return NULL;
     }
-
+    file->obj.sync.ops = &default_fd_sync_ops;
     file->mode = st.st_mode;
     file->access = default_map_access( &file->obj, access );
     list_init( &file->kernel_object );
@@ -173,6 +168,7 @@ struct file *create_file_for_fd_obj( struct fd *fd, unsigned int access, unsigne
 
     if ((file = alloc_object( &file_ops )))
     {
+        file->obj.sync.ops = &default_fd_sync_ops;
         file->mode = st.st_mode;
         file->access = default_map_access( &file->obj, access );
         list_init( &file->kernel_object );
@@ -188,9 +184,10 @@ struct file *create_file_for_fd_obj( struct fd *fd, unsigned int access, unsigne
 
 static struct object *create_file_obj( struct fd *fd, unsigned int access, mode_t mode )
 {
-    struct file *file = alloc_object( &file_ops );
+    struct file *file;
 
-    if (!file) return NULL;
+    if (!(file = alloc_object( &file_ops ))) return NULL;
+    file->obj.sync.ops = &default_fd_sync_ops;
     file->access  = access;
     file->mode    = mode;
     file->uid     = ~(uid_t)0;
diff --git a/server/file.h b/server/file.h
index 59b73c0245c..66a67ec4a16 100644
--- a/server/file.h
+++ b/server/file.h
@@ -24,6 +24,7 @@
 #include <sys/types.h>
 
 #include "object.h"
+#include "thread.h"
 
 struct fd;
 struct mapping;
@@ -108,7 +109,6 @@ extern void set_fd_signaled( struct fd *fd, int signaled );
 extern char *dup_fd_name( struct fd *root, const char *name ) __WINE_DEALLOC(free) __WINE_MALLOC;
 extern void get_nt_name( struct fd *fd, struct unicode_str *name );
 
-extern int default_fd_signaled( struct object *obj, struct wait_queue_entry *entry );
 extern int default_fd_get_poll_events( struct fd *fd );
 extern void default_poll_event( struct fd *fd, int event );
 extern void fd_cancel_async( struct fd *fd, struct async *async );
@@ -132,6 +132,8 @@ extern void remove_process_locks( struct process *process );
 
 static inline struct fd *get_obj_fd( struct object *obj ) { return obj->ops->get_fd( obj ); }
 
+extern const struct sync_ops default_fd_sync_ops;
+
 /* timeout functions */
 
 struct timeout_user;
diff --git a/server/handle.c b/server/handle.c
index 8968df73647..39dad955ed2 100644
--- a/server/handle.c
+++ b/server/handle.c
@@ -123,11 +123,6 @@ static const struct object_ops handle_table_ops =
     sizeof(struct handle_table),     /* size */
     &no_type,                        /* type */
     handle_table_dump,               /* dump */
-    no_add_queue,                    /* add_queue */
-    NULL,                            /* remove_queue */
-    NULL,                            /* signaled */
-    NULL,                            /* satisfied */
-    no_signal,                       /* signal */
     no_get_fd,                       /* get_fd */
     default_map_access,              /* map_access */
     default_get_sd,                  /* get_sd */
diff --git a/server/hook.c b/server/hook.c
index ffe7206369e..45e185f9896 100644
--- a/server/hook.c
+++ b/server/hook.c
@@ -78,11 +78,6 @@ static const struct object_ops hook_table_ops =
     sizeof(struct hook_table),    /* size */
     &no_type,                     /* type */
     hook_table_dump,              /* dump */
-    no_add_queue,                 /* add_queue */
-    NULL,                         /* remove_queue */
-    NULL,                         /* signaled */
-    NULL,                         /* satisfied */
-    no_signal,                    /* signal */
     no_get_fd,                    /* get_fd */
     default_map_access,           /* map_access */
     default_get_sd,               /* get_sd */
diff --git a/server/mailslot.c b/server/mailslot.c
index c54281c2101..3d338b06e71 100644
--- a/server/mailslot.c
+++ b/server/mailslot.c
@@ -78,11 +78,6 @@ static const struct object_ops mailslot_ops =
     sizeof(struct mailslot),   /* size */
     &file_type,                /* type */
     mailslot_dump,             /* dump */
-    add_queue,                 /* add_queue */
-    remove_queue,              /* remove_queue */
-    default_fd_signaled,       /* signaled */
-    no_satisfied,              /* satisfied */
-    no_signal,                 /* signal */
     mailslot_get_fd,           /* get_fd */
     mailslot_map_access,       /* map_access */
     default_get_sd,            /* get_sd */
@@ -139,11 +134,6 @@ static const struct object_ops mail_writer_ops =
     sizeof(struct mail_writer), /* size */
     &file_type,                 /* type */
     mail_writer_dump,           /* dump */
-    no_add_queue,               /* add_queue */
-    NULL,                       /* remove_queue */
-    NULL,                       /* signaled */
-    NULL,                       /* satisfied */
-    no_signal,                  /* signal */
     mail_writer_get_fd,         /* get_fd */
     mail_writer_map_access,     /* map_access */
     default_get_sd,             /* get_sd */
@@ -204,11 +194,6 @@ static const struct object_ops mailslot_device_ops =
     sizeof(struct mailslot_device), /* size */
     &device_type,                   /* type */
     mailslot_device_dump,           /* dump */
-    no_add_queue,                   /* add_queue */
-    NULL,                           /* remove_queue */
-    NULL,                           /* signaled */
-    no_satisfied,                   /* satisfied */
-    no_signal,                      /* signal */
     no_get_fd,                      /* get_fd */
     default_map_access,             /* map_access */
     default_get_sd,                 /* get_sd */
@@ -234,11 +219,6 @@ static const struct object_ops mailslot_device_file_ops =
     sizeof(struct mailslot_device_file),    /* size */
     &file_type,                             /* type */
     mailslot_device_file_dump,              /* dump */
-    add_queue,                              /* add_queue */
-    remove_queue,                           /* remove_queue */
-    default_fd_signaled,                    /* signaled */
-    no_satisfied,                           /* satisfied */
-    no_signal,                              /* signal */
     mailslot_device_file_get_fd,            /* get_fd */
     default_map_access,                     /* map_access */
     default_get_sd,                         /* get_sd */
@@ -483,6 +463,7 @@ static struct object *mailslot_device_open_file( struct object *obj, unsigned in
     struct mailslot_device_file *file;
 
     if (!(file = alloc_object( &mailslot_device_file_ops ))) return NULL;
+    file->obj.sync.ops = &default_fd_sync_ops;
     file->device = (struct mailslot_device *)grab_object( obj );
     if (!(file->fd = alloc_pseudo_fd( &mailslot_device_fd_ops, obj, options )))
     {
@@ -558,7 +539,7 @@ static struct mailslot *create_mailslot( struct object *root,
     struct mailslot *mailslot;
 
     if (!(mailslot = create_named_object( root, &mailslot_ops, name, attr & ~OBJ_OPENIF, sd ))) return NULL;
-
+    mailslot->obj.sync.ops = &default_fd_sync_ops;
     mailslot->fd = NULL;
     mailslot->max_msgsize = max_msgsize;
     mailslot->read_timeout = read_timeout;
diff --git a/server/mapping.c b/server/mapping.c
index 247b28cf6f5..a755577a77f 100644
--- a/server/mapping.c
+++ b/server/mapping.c
@@ -64,11 +64,6 @@ static const struct object_ops ranges_ops =
     sizeof(struct ranges),     /* size */
     &no_type,                  /* type */
     ranges_dump,               /* dump */
-    no_add_queue,              /* add_queue */
-    NULL,                      /* remove_queue */
-    NULL,                      /* signaled */
-    NULL,                      /* satisfied */
-    no_signal,                 /* signal */
     no_get_fd,                 /* get_fd */
     default_map_access,        /* map_access */
     default_get_sd,            /* get_sd */
@@ -100,11 +95,6 @@ static const struct object_ops shared_map_ops =
     sizeof(struct shared_map), /* size */
     &no_type,                  /* type */
     shared_map_dump,           /* dump */
-    no_add_queue,              /* add_queue */
-    NULL,                      /* remove_queue */
-    NULL,                      /* signaled */
-    NULL,                      /* satisfied */
-    no_signal,                 /* signal */
     no_get_fd,                 /* get_fd */
     default_map_access,        /* map_access */
     default_get_sd,            /* get_sd */
@@ -173,11 +163,6 @@ static const struct object_ops mapping_ops =
     sizeof(struct mapping),      /* size */
     &mapping_type,               /* type */
     mapping_dump,                /* dump */
-    no_add_queue,                /* add_queue */
-    NULL,                        /* remove_queue */
-    NULL,                        /* signaled */
-    NULL,                        /* satisfied */
-    no_signal,                   /* signal */
     mapping_get_fd,              /* get_fd */
     default_map_access,          /* map_access */
     default_get_sd,              /* get_sd */
diff --git a/server/mutex.c b/server/mutex.c
index af0efe72132..5b7184e6913 100644
--- a/server/mutex.c
+++ b/server/mutex.c
@@ -65,16 +65,20 @@ static void mutex_satisfied( struct object *obj, struct wait_queue_entry *entry
 static void mutex_destroy( struct object *obj );
 static int mutex_signal( struct object *obj, unsigned int access );
 
-static const struct object_ops mutex_ops =
+static const struct sync_ops mutex_sync_ops =
 {
-    sizeof(struct mutex),      /* size */
-    &mutex_type,               /* type */
-    mutex_dump,                /* dump */
     add_queue,                 /* add_queue */
     remove_queue,              /* remove_queue */
     mutex_signaled,            /* signaled */
     mutex_satisfied,           /* satisfied */
     mutex_signal,              /* signal */
+};
+
+static const struct object_ops mutex_ops =
+{
+    sizeof(struct mutex),      /* size */
+    &mutex_type,               /* type */
+    mutex_dump,                /* dump */
     no_get_fd,                 /* get_fd */
     default_map_access,        /* map_access */
     default_get_sd,            /* get_sd */
@@ -123,6 +127,7 @@ static struct mutex *create_mutex( struct object *root, const struct unicode_str
         if (get_error() != STATUS_OBJECT_NAME_EXISTS)
         {
             /* initialize it if it didn't already exist */
+            mutex->obj.sync.ops = &mutex_sync_ops;
             mutex->count = 0;
             mutex->owner = NULL;
             mutex->abandoned = 0;
diff --git a/server/named_pipe.c b/server/named_pipe.c
index 6e4ae371a1b..a281e908fe6 100644
--- a/server/named_pipe.c
+++ b/server/named_pipe.c
@@ -116,11 +116,6 @@ static const struct object_ops named_pipe_ops =
     sizeof(struct named_pipe),    /* size */
     &no_type,                     /* type */
     named_pipe_dump,              /* dump */
-    no_add_queue,                 /* add_queue */
-    NULL,                         /* remove_queue */
-    NULL,                         /* signaled */
-    NULL,                         /* satisfied */
-    no_signal,                    /* signal */
     no_get_fd,                    /* get_fd */
     named_pipe_map_access,        /* map_access */
     default_get_sd,               /* get_sd */
@@ -164,11 +159,6 @@ static const struct object_ops pipe_server_ops =
     sizeof(struct pipe_server),   /* size */
     &file_type,                   /* type */
     pipe_server_dump,             /* dump */
-    add_queue,                    /* add_queue */
-    remove_queue,                 /* remove_queue */
-    default_fd_signaled,          /* signaled */
-    no_satisfied,                 /* satisfied */
-    no_signal,                    /* signal */
     pipe_end_get_fd,              /* get_fd */
     default_map_access,           /* map_access */
     pipe_end_get_sd,              /* get_sd */
@@ -208,11 +198,6 @@ static const struct object_ops pipe_client_ops =
     sizeof(struct pipe_end),      /* size */
     &file_type,                   /* type */
     pipe_client_dump,             /* dump */
-    add_queue,                    /* add_queue */
-    remove_queue,                 /* remove_queue */
-    default_fd_signaled,          /* signaled */
-    no_satisfied,                 /* satisfied */
-    no_signal,                    /* signal */
     pipe_end_get_fd,              /* get_fd */
     default_map_access,           /* map_access */
     pipe_end_get_sd,              /* get_sd */
@@ -255,11 +240,6 @@ static const struct object_ops named_pipe_device_ops =
     sizeof(struct named_pipe_device), /* size */
     &device_type,                     /* type */
     named_pipe_device_dump,           /* dump */
-    no_add_queue,                     /* add_queue */
-    NULL,                             /* remove_queue */
-    NULL,                             /* signaled */
-    no_satisfied,                     /* satisfied */
-    no_signal,                        /* signal */
     no_get_fd,                        /* get_fd */
     default_map_access,               /* map_access */
     default_get_sd,                   /* get_sd */
@@ -286,11 +266,6 @@ static const struct object_ops named_pipe_device_file_ops =
     sizeof(struct named_pipe_device_file),   /* size */
     &file_type,                              /* type */
     named_pipe_device_file_dump,             /* dump */
-    add_queue,                               /* add_queue */
-    remove_queue,                            /* remove_queue */
-    default_fd_signaled,                     /* signaled */
-    no_satisfied,                            /* satisfied */
-    no_signal,                               /* signal */
     named_pipe_device_file_get_fd,           /* get_fd */
     default_map_access,                      /* map_access */
     default_get_sd,                          /* get_sd */
@@ -336,11 +311,6 @@ static const struct object_ops named_pipe_dir_ops =
     sizeof(struct named_pipe_device_file),   /* size */
     &file_type,                              /* type */
     named_pipe_dir_dump,                     /* dump */
-    add_queue,                               /* add_queue */
-    remove_queue,                            /* remove_queue */
-    default_fd_signaled,                     /* signaled */
-    no_satisfied,                            /* satisfied */
-    no_signal,                               /* signal */
     named_pipe_dir_get_fd,                   /* get_fd */
     default_map_access,                      /* map_access */
     default_get_sd,                          /* get_sd */
@@ -554,10 +524,10 @@ static struct object *named_pipe_device_lookup_name( struct object *obj, struct
     if (!name->len && name->str)
     {
         /* open the root directory */
-        struct named_pipe_device_file *dir = alloc_object( &named_pipe_dir_ops );
-
-        if (!dir) return NULL;
+        struct named_pipe_device_file *dir;
 
+        if (!(dir = alloc_object( &named_pipe_dir_ops ))) return NULL;
+        dir->obj.sync.ops = &default_fd_sync_ops;
         dir->fd = NULL;  /* defer alloc_pseudo_fd() until after we have options */
         dir->device = (struct named_pipe_device *)grab_object( obj );
 
@@ -576,6 +546,7 @@ static struct object *named_pipe_device_open_file( struct object *obj, unsigned
     struct named_pipe_device_file *file;
 
     if (!(file = alloc_object( &named_pipe_device_file_ops ))) return NULL;
+    file->obj.sync.ops = &default_fd_sync_ops;
     file->device = (struct named_pipe_device *)grab_object( obj );
     if (!(file->fd = alloc_pseudo_fd( &named_pipe_device_fd_ops, obj, options )))
     {
@@ -1406,10 +1377,8 @@ static struct pipe_server *create_pipe_server( struct named_pipe *pipe, unsigned
 {
     struct pipe_server *server;
 
-    server = alloc_object( &pipe_server_ops );
-    if (!server)
-        return NULL;
-
+    if (!(server = alloc_object( &pipe_server_ops ))) return NULL;
+    server->pipe_end.obj.sync.ops = &default_fd_sync_ops;
     server->options = options;
     init_pipe_end( &server->pipe_end, pipe, pipe_flags, pipe->insize );
     server->pipe_end.state = FILE_PIPE_LISTENING_STATE;
@@ -1432,10 +1401,8 @@ static struct pipe_end *create_pipe_client( struct named_pipe *pipe, data_size_t
 {
     struct pipe_end *client;
 
-    client = alloc_object( &pipe_client_ops );
-    if (!client)
-        return NULL;
-
+    if (!(client = alloc_object( &pipe_client_ops ))) return NULL;
+    client->obj.sync.ops = &default_fd_sync_ops;
     init_pipe_end( client, pipe, 0, buffer_size );
     client->state = FILE_PIPE_CONNECTED_STATE;
     client->client_pid = get_process_id( current->process );
diff --git a/server/object.c b/server/object.c
index cd368ef724a..70f83870bf7 100644
--- a/server/object.c
+++ b/server/object.c
@@ -105,11 +105,6 @@ static const struct object_ops apc_reserve_ops =
     sizeof(struct reserve),     /* size */
     &apc_reserve_type,          /* type */
     dump_reserve,               /* dump */
-    no_add_queue,               /* add_queue */
-    NULL,                       /* remove_queue */
-    NULL,                       /* signaled */
-    no_satisfied,               /* satisfied */
-    no_signal,                  /* signal */
     no_get_fd,                  /* get_fd */
     default_map_access,         /* map_access */
     default_get_sd,             /* get_sd */
@@ -129,11 +124,6 @@ static const struct object_ops completion_reserve_ops =
     sizeof(struct reserve),    /* size */
     &completion_reserve_type,  /* type */
     dump_reserve,              /* dump */
-    no_add_queue,              /* add_queue */
-    NULL,                      /* remove_queue */
-    NULL,                      /* signaled */
-    no_satisfied,              /* satisfied */
-    no_signal,                 /* signal */
     no_get_fd,                 /* get_fd */
     default_map_access,        /* map_access */
     default_get_sd,            /* get_sd */
@@ -295,6 +285,15 @@ WCHAR *default_get_full_name( struct object *obj, data_size_t *ret_len )
     return (WCHAR *)ret;
 }
 
+static const struct sync_ops no_sync_ops =
+{
+    no_add_queue,                   /* add_queue */
+    NULL,                           /* remove_queue */
+    NULL,                           /* signaled */
+    NULL,                           /* satisfied */
+    no_signal,                      /* signal */
+};
+
 /* allocate and initialize an object */
 void *alloc_object( const struct object_ops *ops )
 {
@@ -305,6 +304,7 @@ void *alloc_object( const struct object_ops *ops )
         obj->handle_count = 0;
         obj->is_permanent = 0;
         obj->ops          = ops;
+        obj->sync.ops     = &no_sync_ops;
         obj->name         = NULL;
         obj->sd           = NULL;
         list_init( &obj->wait_queue );
diff --git a/server/object.h b/server/object.h
index 1058f9bfb0a..199ce98ed65 100644
--- a/server/object.h
+++ b/server/object.h
@@ -63,15 +63,9 @@ struct type_descr
     unsigned int       handle_max;    /* max count of handles of this type */
 };
 
-/* operations valid on all objects */
-struct object_ops
+/* operations valid on waitable objects */
+struct sync_ops
 {
-    /* size of this object type */
-    size_t size;
-    /* type descriptor */
-    struct type_descr *type;
-    /* dump the object (for debugging) */
-    void (*dump)(struct object *,int);
     /* add a thread to the object wait queue */
     int  (*add_queue)(struct object *,struct wait_queue_entry *);
     /* remove a thread from the object wait queue */
@@ -82,6 +76,22 @@ struct object_ops
     void (*satisfied)(struct object *,struct wait_queue_entry *);
     /* signal an object */
     int  (*signal)(struct object *, unsigned int);
+};
+
+struct sync
+{
+    const struct sync_ops *ops;
+};
+
+/* operations valid on all objects */
+struct object_ops
+{
+    /* size of this object type */
+    size_t size;
+    /* type descriptor */
+    struct type_descr *type;
+    /* dump the object (for debugging) */
+    void (*dump)(struct object *,int);
     /* return an fd object that can be used to read/write from the object */
     struct fd *(*get_fd)(struct object *);
     /* map access rights to the specific rights for this object */
@@ -114,6 +124,7 @@ struct object
     unsigned int              refcount;    /* reference count */
     unsigned int              handle_count;/* handle count */
     const struct object_ops  *ops;
+    struct sync               sync;
     struct list               wait_queue;
     struct object_name       *name;
     struct security_descriptor *sd;
diff --git a/server/process.c b/server/process.c
index b161e3394ba..19ece8c56c4 100644
--- a/server/process.c
+++ b/server/process.c
@@ -97,16 +97,20 @@ static struct list *process_get_kernel_obj_list( struct object *obj );
 static void process_destroy( struct object *obj );
 static void terminate_process( struct process *process, struct thread *skip, int exit_code );
 
-static const struct object_ops process_ops =
+static const struct sync_ops process_sync_ops =
 {
-    sizeof(struct process),      /* size */
-    &process_type,               /* type */
-    process_dump,                /* dump */
     add_queue,                   /* add_queue */
     remove_queue,                /* remove_queue */
     process_signaled,            /* signaled */
     no_satisfied,                /* satisfied */
     no_signal,                   /* signal */
+};
+
+static const struct object_ops process_ops =
+{
+    sizeof(struct process),      /* size */
+    &process_type,               /* type */
+    process_dump,                /* dump */
     no_get_fd,                   /* get_fd */
     process_map_access,          /* map_access */
     process_get_sd,              /* get_sd */
@@ -148,16 +152,20 @@ static void startup_info_dump( struct object *obj, int verbose );
 static int startup_info_signaled( struct object *obj, struct wait_queue_entry *entry );
 static void startup_info_destroy( struct object *obj );
 
-static const struct object_ops startup_info_ops =
+static const struct sync_ops startup_info_sync_ops =
 {
-    sizeof(struct startup_info),   /* size */
-    &no_type,                      /* type */
-    startup_info_dump,             /* dump */
     add_queue,                     /* add_queue */
     remove_queue,                  /* remove_queue */
     startup_info_signaled,         /* signaled */
     no_satisfied,                  /* satisfied */
     no_signal,                     /* signal */
+};
+
+static const struct object_ops startup_info_ops =
+{
+    sizeof(struct startup_info),   /* size */
+    &no_type,                      /* type */
+    startup_info_dump,             /* dump */
     no_get_fd,                     /* get_fd */
     default_map_access,            /* map_access */
     default_get_sd,                /* get_sd */
@@ -209,16 +217,20 @@ struct job
     struct list child_job_list;    /* list of child jobs */
 };
 
-static const struct object_ops job_ops =
+static const struct sync_ops job_sync_ops =
 {
-    sizeof(struct job),            /* size */
-    &job_type,                     /* type */
-    job_dump,                      /* dump */
     add_queue,                     /* add_queue */
     remove_queue,                  /* remove_queue */
     job_signaled,                  /* signaled */
     no_satisfied,                  /* satisfied */
     no_signal,                     /* signal */
+};
+
+static const struct object_ops job_ops =
+{
+    sizeof(struct job),            /* size */
+    &job_type,                     /* type */
+    job_dump,                      /* dump */
     no_get_fd,                     /* get_fd */
     default_map_access,            /* map_access */
     default_get_sd,                /* get_sd */
@@ -243,6 +255,7 @@ static struct job *create_job_object( struct object *root, const struct unicode_
         if (get_error() != STATUS_OBJECT_NAME_EXISTS)
         {
             /* initialize it if it didn't already exist */
+            job->obj.sync.ops = &job_sync_ops;
             list_init( &job->process_list );
             list_init( &job->child_job_list );
             job->num_processes = 0;
@@ -650,6 +663,7 @@ struct process *create_process( int fd, struct process *parent, unsigned int fla
         close( fd );
         goto error;
     }
+    process->obj.sync.ops    = &process_sync_ops;
     process->parent_id       = 0;
     process->debug_obj       = NULL;
     process->debug_event     = NULL;
@@ -1199,6 +1213,7 @@ DECL_HANDLER(new_process)
         release_object( parent );
         return;
     }
+    info->obj.sync.ops = &startup_info_sync_ops;
     info->process  = NULL;
     info->data     = NULL;
 
diff --git a/server/queue.c b/server/queue.c
index b4b6069f927..7146ee51a2c 100644
--- a/server/queue.c
+++ b/server/queue.c
@@ -157,16 +157,20 @@ static void thread_input_dump( struct object *obj, int verbose );
 static void thread_input_destroy( struct object *obj );
 static void timer_callback( void *private );
 
-static const struct object_ops msg_queue_ops =
+static const struct sync_ops msg_queue_sync_ops =
 {
-    sizeof(struct msg_queue),  /* size */
-    &no_type,                  /* type */
-    msg_queue_dump,            /* dump */
     msg_queue_add_queue,       /* add_queue */
     msg_queue_remove_queue,    /* remove_queue */
     msg_queue_signaled,        /* signaled */
     msg_queue_satisfied,       /* satisfied */
     no_signal,                 /* signal */
+};
+
+static const struct object_ops msg_queue_ops =
+{
+    sizeof(struct msg_queue),  /* size */
+    &no_type,                  /* type */
+    msg_queue_dump,            /* dump */
     no_get_fd,                 /* get_fd */
     default_map_access,        /* map_access */
     default_get_sd,            /* get_sd */
@@ -199,11 +203,6 @@ static const struct object_ops thread_input_ops =
     sizeof(struct thread_input),  /* size */
     &no_type,                     /* type */
     thread_input_dump,            /* dump */
-    no_add_queue,                 /* add_queue */
-    NULL,                         /* remove_queue */
-    NULL,                         /* signaled */
-    NULL,                         /* satisfied */
-    no_signal,                    /* signal */
     no_get_fd,                    /* get_fd */
     default_map_access,           /* map_access */
     default_get_sd,               /* get_sd */
@@ -301,6 +300,7 @@ static struct msg_queue *create_msg_queue( struct thread *thread, struct thread_
 
     if ((queue = alloc_object( &msg_queue_ops )))
     {
+        queue->obj.sync.ops    = &msg_queue_sync_ops;
         queue->fd              = NULL;
         queue->paint_count     = 0;
         queue->hotkey_count    = 0;
diff --git a/server/registry.c b/server/registry.c
index c60c737feff..bd80d3e7399 100644
--- a/server/registry.c
+++ b/server/registry.c
@@ -177,11 +177,6 @@ static const struct object_ops key_ops =
     sizeof(struct key),      /* size */
     &key_type,               /* type */
     key_dump,                /* dump */
-    no_add_queue,            /* add_queue */
-    NULL,                    /* remove_queue */
-    NULL,                    /* signaled */
-    NULL,                    /* satisfied */
-    no_signal,               /* signal */
     no_get_fd,               /* get_fd */
     key_map_access,          /* map_access */
     key_get_sd,              /* get_sd */
diff --git a/server/request.c b/server/request.c
index 2254315b79e..474750523bf 100644
--- a/server/request.c
+++ b/server/request.c
@@ -86,11 +86,6 @@ static const struct object_ops master_socket_ops =
     sizeof(struct master_socket),  /* size */
     &no_type,                      /* type */
     master_socket_dump,            /* dump */
-    no_add_queue,                  /* add_queue */
-    NULL,                          /* remove_queue */
-    NULL,                          /* signaled */
-    NULL,                          /* satisfied */
-    no_signal,                     /* signal */
     no_get_fd,                     /* get_fd */
     default_map_access,            /* map_access */
     default_get_sd,                /* get_sd */
diff --git a/server/semaphore.c b/server/semaphore.c
index 53b42a886df..7c7de0f77f7 100644
--- a/server/semaphore.c
+++ b/server/semaphore.c
@@ -62,16 +62,20 @@ static int semaphore_signaled( struct object *obj, struct wait_queue_entry *entr
 static void semaphore_satisfied( struct object *obj, struct wait_queue_entry *entry );
 static int semaphore_signal( struct object *obj, unsigned int access );
 
-static const struct object_ops semaphore_ops =
+static const struct sync_ops semaphore_sync_ops =
 {
-    sizeof(struct semaphore),      /* size */
-    &semaphore_type,               /* type */
-    semaphore_dump,                /* dump */
     add_queue,                     /* add_queue */
     remove_queue,                  /* remove_queue */
     semaphore_signaled,            /* signaled */
     semaphore_satisfied,           /* satisfied */
     semaphore_signal,              /* signal */
+};
+
+static const struct object_ops semaphore_ops =
+{
+    sizeof(struct semaphore),      /* size */
+    &semaphore_type,               /* type */
+    semaphore_dump,                /* dump */
     no_get_fd,                     /* get_fd */
     default_map_access,            /* map_access */
     default_get_sd,                /* get_sd */
@@ -103,6 +107,7 @@ static struct semaphore *create_semaphore( struct object *root, const struct uni
         if (get_error() != STATUS_OBJECT_NAME_EXISTS)
         {
             /* initialize it if it didn't already exist */
+            sem->obj.sync.ops = &semaphore_sync_ops;
             sem->count = initial;
             sem->max   = max;
         }
diff --git a/server/serial.c b/server/serial.c
index 209f2e9174e..aedc962174a 100644
--- a/server/serial.c
+++ b/server/serial.c
@@ -88,11 +88,6 @@ static const struct object_ops serial_ops =
     sizeof(struct serial),        /* size */
     &file_type,                   /* type */
     serial_dump,                  /* dump */
-    add_queue,                    /* add_queue */
-    remove_queue,                 /* remove_queue */
-    default_fd_signaled,          /* signaled */
-    no_satisfied,                 /* satisfied */
-    no_signal,                    /* signal */
     serial_get_fd,                /* get_fd */
     default_map_access,           /* map_access */
     default_get_sd,               /* get_sd */
@@ -137,7 +132,7 @@ struct object *create_serial( struct fd *fd )
     struct serial *serial;
 
     if (!(serial = alloc_object( &serial_ops ))) return NULL;
-
+    serial->obj.sync.ops = &default_fd_sync_ops;
     serial->read_timer   = NULL;
     serial->eventmask    = 0;
     serial->pending_write = 0;
diff --git a/server/signal.c b/server/signal.c
index 19b76d44c16..8016c507367 100644
--- a/server/signal.c
+++ b/server/signal.c
@@ -59,11 +59,6 @@ static const struct object_ops handler_ops =
     sizeof(struct handler),   /* size */
     &no_type,                 /* type */
     handler_dump,             /* dump */
-    no_add_queue,             /* add_queue */
-    NULL,                     /* remove_queue */
-    NULL,                     /* signaled */
-    NULL,                     /* satisfied */
-    no_signal,                /* signal */
     no_get_fd,                /* get_fd */
     default_map_access,       /* map_access */
     default_get_sd,           /* get_sd */
diff --git a/server/sock.c b/server/sock.c
index e064f867ff4..4dd973ae7d8 100644
--- a/server/sock.c
+++ b/server/sock.c
@@ -483,11 +483,6 @@ static const struct object_ops sock_ops =
     sizeof(struct sock),          /* size */
     &file_type,                   /* type */
     sock_dump,                    /* dump */
-    add_queue,                    /* add_queue */
-    remove_queue,                 /* remove_queue */
-    default_fd_signaled,          /* signaled */
-    no_satisfied,                 /* satisfied */
-    no_signal,                    /* signal */
     sock_get_fd,                  /* get_fd */
     default_map_access,           /* map_access */
     default_get_sd,               /* get_sd */
@@ -1782,6 +1777,7 @@ static struct sock *create_socket(void)
     struct sock *sock;
 
     if (!(sock = alloc_object( &sock_ops ))) return NULL;
+    sock->obj.sync.ops = &default_fd_sync_ops;
     sock->fd      = NULL;
     sock->state   = SOCK_UNCONNECTED;
     sock->mask    = 0;
@@ -3692,11 +3688,6 @@ static const struct object_ops ifchange_ops =
     sizeof(struct ifchange), /* size */
     &no_type,                /* type */
     ifchange_dump,           /* dump */
-    no_add_queue,            /* add_queue */
-    NULL,                    /* remove_queue */
-    NULL,                    /* signaled */
-    no_satisfied,            /* satisfied */
-    no_signal,               /* signal */
     ifchange_get_fd,         /* get_fd */
     default_map_access,      /* map_access */
     default_get_sd,          /* get_sd */
@@ -3913,11 +3904,6 @@ static const struct object_ops socket_device_ops =
     sizeof(struct object),      /* size */
     &device_type,               /* type */
     socket_device_dump,         /* dump */
-    no_add_queue,               /* add_queue */
-    NULL,                       /* remove_queue */
-    NULL,                       /* signaled */
-    no_satisfied,               /* satisfied */
-    no_signal,                  /* signal */
     no_get_fd,                  /* get_fd */
     default_map_access,         /* map_access */
     default_get_sd,             /* get_sd */
diff --git a/server/symlink.c b/server/symlink.c
index 74b60162c01..125130fc90c 100644
--- a/server/symlink.c
+++ b/server/symlink.c
@@ -68,11 +68,6 @@ static const struct object_ops symlink_ops =
     sizeof(struct symlink),       /* size */
     &symlink_type,                /* type */
     symlink_dump,                 /* dump */
-    no_add_queue,                 /* add_queue */
-    NULL,                         /* remove_queue */
-    NULL,                         /* signaled */
-    NULL,                         /* satisfied */
-    no_signal,                    /* signal */
     no_get_fd,                    /* get_fd */
     default_map_access,           /* map_access */
     default_get_sd,               /* get_sd */
diff --git a/server/thread.c b/server/thread.c
index ffc016bfa56..ea4432ec6a6 100644
--- a/server/thread.c
+++ b/server/thread.c
@@ -98,16 +98,20 @@ static int thread_apc_signaled( struct object *obj, struct wait_queue_entry *ent
 static void thread_apc_destroy( struct object *obj );
 static void clear_apc_queue( struct list *queue );
 
-static const struct object_ops thread_apc_ops =
+static const struct sync_ops thread_apc_sync_ops =
 {
-    sizeof(struct thread_apc),  /* size */
-    &no_type,                   /* type */
-    dump_thread_apc,            /* dump */
     add_queue,                  /* add_queue */
     remove_queue,               /* remove_queue */
     thread_apc_signaled,        /* signaled */
     no_satisfied,               /* satisfied */
     no_signal,                  /* signal */
+};
+
+static const struct object_ops thread_apc_ops =
+{
+    sizeof(struct thread_apc),  /* size */
+    &no_type,                   /* type */
+    dump_thread_apc,            /* dump */
     no_get_fd,                  /* get_fd */
     default_map_access,         /* map_access */
     default_get_sd,             /* get_sd */
@@ -140,16 +144,20 @@ static const unsigned int system_flags = SERVER_CTX_DEBUG_REGISTERS;
 static void dump_context( struct object *obj, int verbose );
 static int context_signaled( struct object *obj, struct wait_queue_entry *entry );
 
-static const struct object_ops context_ops =
+static const struct sync_ops context_sync_ops =
 {
-    sizeof(struct context),     /* size */
-    &no_type,                   /* type */
-    dump_context,               /* dump */
     add_queue,                  /* add_queue */
     remove_queue,               /* remove_queue */
     context_signaled,           /* signaled */
     no_satisfied,               /* satisfied */
     no_signal,                  /* signal */
+};
+
+static const struct object_ops context_ops =
+{
+    sizeof(struct context),     /* size */
+    &no_type,                   /* type */
+    dump_context,               /* dump */
     no_get_fd,                  /* get_fd */
     default_map_access,         /* map_access */
     default_get_sd,             /* get_sd */
@@ -189,16 +197,20 @@ static void thread_poll_event( struct fd *fd, int event );
 static struct list *thread_get_kernel_obj_list( struct object *obj );
 static void destroy_thread( struct object *obj );
 
-static const struct object_ops thread_ops =
+static const struct sync_ops thread_sync_ops =
 {
-    sizeof(struct thread),      /* size */
-    &thread_type,               /* type */
-    dump_thread,                /* dump */
     add_queue,                  /* add_queue */
     remove_queue,               /* remove_queue */
     thread_signaled,            /* signaled */
     no_satisfied,               /* satisfied */
     no_signal,                  /* signal */
+};
+
+static const struct object_ops thread_ops =
+{
+    sizeof(struct thread),      /* size */
+    &thread_type,               /* type */
+    dump_thread,                /* dump */
     no_get_fd,                  /* get_fd */
     thread_map_access,          /* map_access */
     default_get_sd,             /* get_sd */
@@ -389,6 +401,7 @@ static inline void init_thread_structure( struct thread *thread )
 {
     int i;
 
+    thread->obj.sync.ops    = &thread_sync_ops;
     thread->unix_pid        = -1;  /* not known yet */
     thread->unix_tid        = -1;  /* not known yet */
     thread->context         = NULL;
@@ -458,6 +471,7 @@ static struct context *create_thread_context( struct thread *thread )
 {
     struct context *context;
     if (!(context = alloc_object( &context_ops ))) return NULL;
+    context->obj.sync.ops = &context_sync_ops;
     context->status = STATUS_PENDING;
     memset( &context->regs, 0, sizeof(context->regs) );
     context->regs[CTX_NATIVE].machine = native_machine;
@@ -683,6 +697,7 @@ static struct thread_apc *create_apc( struct object *owner, const union apc_call
 
     if ((apc = alloc_object( &thread_apc_ops )))
     {
+        apc->obj.sync.ops = &thread_apc_sync_ops;
         if (call_data) apc->call = *call_data;
         else apc->call.type = APC_NONE;
         apc->caller      = NULL;
@@ -976,18 +991,18 @@ static unsigned int end_wait( struct thread *thread, unsigned int status )
         if (wait->select == SELECT_WAIT_ALL)
         {
             for (i = 0, entry = wait->queues; i < wait->count; i++, entry++)
-                entry->obj->ops->satisfied( entry->obj, entry );
+                entry->obj->sync.ops->satisfied( entry->obj, entry );
         }
         else
         {
             entry = wait->queues + status;
-            entry->obj->ops->satisfied( entry->obj, entry );
+            entry->obj->sync.ops->satisfied( entry->obj, entry );
         }
         status = wait->status;
         if (wait->abandoned) status += STATUS_ABANDONED_WAIT_0;
     }
     for (i = 0, entry = wait->queues; i < wait->count; i++, entry++)
-        entry->obj->ops->remove_queue( entry->obj, entry );
+        entry->obj->sync.ops->remove_queue( entry->obj, entry );
     if (wait->user) remove_timeout_user( wait->user );
     free( wait );
     return status;
@@ -1017,7 +1032,7 @@ static int wait_on( const union select_op *select_op, unsigned int count, struct
     {
         struct object *obj = objects[i];
         entry->wait = wait;
-        if (!obj->ops->add_queue( obj, entry ))
+        if (!obj->sync.ops->add_queue( obj, entry ))
         {
             wait->count = i;
             end_wait( current, get_error() );
@@ -1071,13 +1086,13 @@ static int check_wait( struct thread *thread )
         /* Note: we must check them all anyway, as some objects may
          * want to do something when signaled, even if others are not */
         for (i = 0, entry = wait->queues; i < wait->count; i++, entry++)
-            not_ok |= !entry->obj->ops->signaled( entry->obj, entry );
+            not_ok |= !entry->obj->sync.ops->signaled( entry->obj, entry );
         if (!not_ok) return STATUS_WAIT_0;
     }
     else
     {
         for (i = 0, entry = wait->queues; i < wait->count; i++, entry++)
-            if (entry->obj->ops->signaled( entry->obj, entry )) return i;
+            if (entry->obj->sync.ops->signaled( entry->obj, entry )) return i;
     }
 
     if ((wait->flags & SELECT_ALERTABLE) && !list_empty(&thread->user_apc)) return STATUS_USER_APC;
@@ -1193,7 +1208,7 @@ static int signal_object( obj_handle_t handle )
     obj = get_handle_obj( current->process, handle, 0, NULL );
     if (obj)
     {
-        ret = obj->ops->signal( obj, get_handle_access( current->process, handle ));
+        ret = obj->sync.ops->signal( obj, get_handle_access( current->process, handle ));
         release_object( obj );
     }
     return ret;
diff --git a/server/timer.c b/server/timer.c
index b0b6ec81535..c82845cf80f 100644
--- a/server/timer.c
+++ b/server/timer.c
@@ -68,16 +68,20 @@ static int timer_signaled( struct object *obj, struct wait_queue_entry *entry );
 static void timer_satisfied( struct object *obj, struct wait_queue_entry *entry );
 static void timer_destroy( struct object *obj );
 
-static const struct object_ops timer_ops =
+static const struct sync_ops timer_sync_ops =
 {
-    sizeof(struct timer),      /* size */
-    &timer_type,               /* type */
-    timer_dump,                /* dump */
     add_queue,                 /* add_queue */
     remove_queue,              /* remove_queue */
     timer_signaled,            /* signaled */
     timer_satisfied,           /* satisfied */
     no_signal,                 /* signal */
+};
+
+static const struct object_ops timer_ops =
+{
+    sizeof(struct timer),      /* size */
+    &timer_type,               /* type */
+    timer_dump,                /* dump */
     no_get_fd,                 /* get_fd */
     default_map_access,        /* map_access */
     default_get_sd,            /* get_sd */
@@ -104,6 +108,7 @@ static struct timer *create_timer( struct object *root, const struct unicode_str
         if (get_error() != STATUS_OBJECT_NAME_EXISTS)
         {
             /* initialize it if it didn't already exist */
+            timer->obj.sync.ops = &timer_sync_ops;
             timer->manual   = manual;
             timer->signaled = 0;
             timer->when     = 0;
diff --git a/server/token.c b/server/token.c
index 7e20c670a16..e7a975ae793 100644
--- a/server/token.c
+++ b/server/token.c
@@ -142,11 +142,6 @@ static const struct object_ops token_ops =
     sizeof(struct token),      /* size */
     &token_type,               /* type */
     token_dump,                /* dump */
-    no_add_queue,              /* add_queue */
-    NULL,                      /* remove_queue */
-    NULL,                      /* signaled */
-    NULL,                      /* satisfied */
-    no_signal,                 /* signal */
     no_get_fd,                 /* get_fd */
     default_map_access,        /* map_access */
     default_get_sd,            /* get_sd */
diff --git a/server/window.c b/server/window.c
index f7f9d5e517f..da215ab5b78 100644
--- a/server/window.c
+++ b/server/window.c
@@ -104,11 +104,6 @@ static const struct object_ops window_ops =
     sizeof(struct window),    /* size */
     &no_type,                 /* type */
     window_dump,              /* dump */
-    no_add_queue,             /* add_queue */
-    NULL,                     /* remove_queue */
-    NULL,                     /* signaled */
-    NULL,                     /* satisfied */
-    no_signal,                /* signal */
     no_get_fd,                /* get_fd */
     default_map_access,       /* map_access */
     default_get_sd,           /* get_sd */
diff --git a/server/winstation.c b/server/winstation.c
index b3746090ccf..5b33abb257f 100644
--- a/server/winstation.c
+++ b/server/winstation.c
@@ -73,11 +73,6 @@ static const struct object_ops winstation_ops =
     sizeof(struct winstation),    /* size */
     &winstation_type,             /* type */
     winstation_dump,              /* dump */
-    no_add_queue,                 /* add_queue */
-    NULL,                         /* remove_queue */
-    NULL,                         /* signaled */
-    NULL,                         /* satisfied */
-    no_signal,                    /* signal */
     no_get_fd,                    /* get_fd */
     default_map_access,           /* map_access */
     default_get_sd,               /* get_sd */
@@ -113,11 +108,6 @@ static const struct object_ops desktop_ops =
     sizeof(struct desktop),       /* size */
     &desktop_type,                /* type */
     desktop_dump,                 /* dump */
-    no_add_queue,                 /* add_queue */
-    NULL,                         /* remove_queue */
-    NULL,                         /* signaled */
-    NULL,                         /* satisfied */
-    no_signal,                    /* signal */
     no_get_fd,                    /* get_fd */
     default_map_access,           /* map_access */
     default_get_sd,               /* get_sd */
-- 
GitLab


https://gitlab.winehq.org/wine/wine/-/merge_requests/7848

[PATCH 2/8] server: Redirect fd-based objects sync to the fd.

[Rémi Bernon]

From: Rémi Bernon <rbernon(a)codeweavers.com>

---
 server/async.c      | 10 ++++++
 server/atom.c       |  1 +
 server/change.c     |  2 +-
 server/clipboard.c  |  1 +
 server/completion.c | 19 +++++++++-
 server/console.c    | 47 ++++++++++++++++++++++++
 server/debugger.c   | 18 ++++++++++
 server/device.c     | 13 ++++++-
 server/directory.c  |  2 ++
 server/event.c      | 18 ++++++++++
 server/fd.c         | 54 ++++++++++++++++++++--------
 server/file.c       |  4 +--
 server/file.h       |  3 +-
 server/handle.c     |  1 +
 server/hook.c       |  1 +
 server/mailslot.c   |  6 ++--
 server/mapping.c    |  3 ++
 server/mutex.c      |  9 +++++
 server/named_pipe.c | 10 +++---
 server/object.c     | 12 +++++++
 server/object.h     |  3 ++
 server/process.c    | 27 ++++++++++++++
 server/queue.c      | 10 ++++++
 server/registry.c   |  1 +
 server/request.c    |  1 +
 server/semaphore.c  |  9 +++++
 server/serial.c     |  2 +-
 server/signal.c     |  1 +
 server/sock.c       |  4 ++-
 server/symlink.c    |  1 +
 server/thread.c     | 87 +++++++++++++++++++++++++++++++++++++++++----
 server/timer.c      |  9 +++++
 server/token.c      |  1 +
 server/window.c     |  1 +
 server/winstation.c |  2 ++
 35 files changed, 356 insertions(+), 37 deletions(-)

diff --git a/server/async.c b/server/async.c
index 46ce1e3b6bc..50c4bcf58c2 100644
--- a/server/async.c
+++ b/server/async.c
@@ -66,6 +66,7 @@ struct async
 };
 
 static void async_dump( struct object *obj, int verbose );
+static struct sync *async_get_sync( struct object *obj );
 static int async_signaled( struct object *obj, struct wait_queue_entry *entry );
 static void async_satisfied( struct object * obj, struct wait_queue_entry *entry );
 static void async_destroy( struct object *obj );
@@ -85,6 +86,7 @@ static const struct object_ops async_ops =
     &no_type,                  /* type */
     async_dump,                /* dump */
     no_get_fd,                 /* get_fd */
+    async_get_sync,            /* get_sync */
     default_map_access,        /* map_access */
     default_get_sd,            /* get_sd */
     default_set_sd,            /* set_sd */
@@ -110,6 +112,13 @@ static void async_dump( struct object *obj, int verbose )
     fprintf( stderr, "Async thread=%p\n", async->thread );
 }
 
+static struct sync *async_get_sync( struct object *obj )
+{
+    struct async *async = (struct async *)obj;
+    assert( obj->ops == &async_ops );
+    return &async->obj.sync;
+}
+
 static int async_signaled( struct object *obj, struct wait_queue_entry *entry )
 {
     struct async *async = (struct async *)obj;
@@ -700,6 +709,7 @@ static const struct object_ops iosb_ops =
     &no_type,                 /* type */
     iosb_dump,                /* dump */
     no_get_fd,                /* get_fd */
+    no_get_sync,              /* get_sync */
     default_map_access,       /* map_access */
     default_get_sd,           /* get_sd */
     default_set_sd,           /* set_sd */
diff --git a/server/atom.c b/server/atom.c
index 04feea060fc..ef2ca3b360a 100644
--- a/server/atom.c
+++ b/server/atom.c
@@ -77,6 +77,7 @@ static const struct object_ops atom_table_ops =
     &no_type,                     /* type */
     atom_table_dump,              /* dump */
     no_get_fd,                    /* get_fd */
+    no_get_sync,                  /* get_sync */
     default_map_access,           /* map_access */
     default_get_sd,               /* get_sd */
     default_set_sd,               /* set_sd */
diff --git a/server/change.c b/server/change.c
index 31fa33f2e96..bdc7c7fe7d3 100644
--- a/server/change.c
+++ b/server/change.c
@@ -110,6 +110,7 @@ static const struct object_ops dir_ops =
     &file_type,               /* type */
     dir_dump,                 /* dump */
     dir_get_fd,               /* get_fd */
+    default_fd_get_sync,      /* get_sync */
     default_map_access,       /* map_access */
     dir_get_sd,               /* get_sd */
     dir_set_sd,               /* set_sd */
@@ -1133,7 +1134,6 @@ struct object *create_dir_obj( struct fd *fd, unsigned int access, mode_t mode )
     struct dir *dir;
 
     if (!(dir = alloc_object( &dir_ops ))) return NULL;
-    dir->obj.sync.ops = &default_fd_sync_ops;
     list_init( &dir->change_records );
     dir->filter = 0;
     dir->notified = 0;
diff --git a/server/clipboard.c b/server/clipboard.c
index 814d3c8f901..bc7855cd081 100644
--- a/server/clipboard.c
+++ b/server/clipboard.c
@@ -74,6 +74,7 @@ static const struct object_ops clipboard_ops =
     &no_type,                     /* type */
     clipboard_dump,               /* dump */
     no_get_fd,                    /* get_fd */
+    no_get_sync,                  /* get_sync */
     default_map_access,           /* map_access */
     default_get_sd,               /* get_sd */
     default_set_sd,               /* set_sd */
diff --git a/server/completion.c b/server/completion.c
index ad257a57f4d..052112866a4 100644
--- a/server/completion.c
+++ b/server/completion.c
@@ -80,6 +80,7 @@ struct completion
 };
 
 static void completion_wait_dump( struct object*, int );
+static struct sync *completion_wait_get_sync( struct object * );
 static int completion_wait_signaled( struct object *obj, struct wait_queue_entry *entry );
 static void completion_wait_satisfied( struct object *obj, struct wait_queue_entry *entry );
 static void completion_wait_destroy( struct object * );
@@ -99,6 +100,7 @@ static const struct object_ops completion_wait_ops =
     &no_type,                       /* type */
     completion_wait_dump,           /* dump */
     no_get_fd,                      /* get_fd */
+    completion_wait_get_sync,       /* get_sync */
     default_map_access,             /* map_access */
     default_get_sd,                 /* get_sd */
     default_set_sd,                 /* set_sd */
@@ -115,7 +117,6 @@ static const struct object_ops completion_wait_ops =
 static void completion_wait_destroy( struct object *obj )
 {
     struct completion_wait *wait = (struct completion_wait *)obj;
-
     free( wait->msg );
 }
 
@@ -127,6 +128,13 @@ static void completion_wait_dump( struct object *obj, int verbose )
     fprintf( stderr, "Completion wait completion=%p\n", wait->completion );
 }
 
+static struct sync *completion_wait_get_sync( struct object *obj )
+{
+    struct completion_wait *wait = (struct completion_wait *)obj;
+    assert( obj->ops == &completion_wait_ops );
+    return &wait->obj.sync;
+}
+
 static int completion_wait_signaled( struct object *obj, struct wait_queue_entry *entry )
 {
     struct completion_wait *wait = (struct completion_wait *)obj;
@@ -158,6 +166,7 @@ static void completion_wait_satisfied( struct object *obj, struct wait_queue_ent
 }
 
 static void completion_dump( struct object*, int );
+static struct sync *completion_get_sync( struct object * );
 static int completion_signaled( struct object *obj, struct wait_queue_entry *entry );
 static int completion_close_handle( struct object *obj, struct process *process, obj_handle_t handle );
 static void completion_destroy( struct object * );
@@ -177,6 +186,7 @@ static const struct object_ops completion_ops =
     &completion_type,          /* type */
     completion_dump,           /* dump */
     no_get_fd,                 /* get_fd */
+    completion_get_sync,       /* get_sync */
     default_map_access,        /* map_access */
     default_get_sd,            /* get_sd */
     default_set_sd,            /* set_sd */
@@ -209,6 +219,13 @@ static void completion_dump( struct object *obj, int verbose )
     fprintf( stderr, "Completion depth=%u\n", completion->depth );
 }
 
+static struct sync *completion_get_sync( struct object *obj )
+{
+    struct completion *completion = (struct completion *)obj;
+    assert( obj->ops == &completion_ops );
+    return &completion->obj.sync;
+}
+
 static int completion_signaled( struct object *obj, struct wait_queue_entry *entry )
 {
     struct completion *completion = (struct completion *)obj;
diff --git a/server/console.c b/server/console.c
index e0fb85e8cc5..8ee1690551b 100644
--- a/server/console.c
+++ b/server/console.c
@@ -70,6 +70,7 @@ static void console_dump( struct object *obj, int verbose );
 static void console_destroy( struct object *obj );
 static int console_signaled( struct object *obj, struct wait_queue_entry *entry );
 static struct fd *console_get_fd( struct object *obj );
+static struct sync *console_get_sync( struct object *obj );
 static struct object *console_lookup_name( struct object *obj, struct unicode_str *name,
                                            unsigned int attr, struct object *root );
 static struct object *console_open_file( struct object *obj, unsigned int access,
@@ -91,6 +92,7 @@ static const struct object_ops console_ops =
     &file_type,                       /* type */
     console_dump,                     /* dump */
     console_get_fd,                   /* get_fd */
+    console_get_sync,                 /* get_sync */
     default_map_access,               /* map_access */
     default_get_sd,                   /* get_sd */
     default_set_sd,                   /* set_sd */
@@ -152,6 +154,7 @@ static void console_server_dump( struct object *obj, int verbose );
 static void console_server_destroy( struct object *obj );
 static int console_server_signaled( struct object *obj, struct wait_queue_entry *entry );
 static struct fd *console_server_get_fd( struct object *obj );
+static struct sync *console_server_get_sync( struct object *obj );
 static struct object *console_server_lookup_name( struct object *obj, struct unicode_str *name,
                                                 unsigned int attr, struct object *root );
 static struct object *console_server_open_file( struct object *obj, unsigned int access,
@@ -172,6 +175,7 @@ static const struct object_ops console_server_ops =
     &file_type,                       /* type */
     console_server_dump,              /* dump */
     console_server_get_fd,            /* get_fd */
+    console_server_get_sync,          /* get_sync */
     default_map_access,               /* map_access */
     default_get_sd,                   /* get_sd */
     default_set_sd,                   /* set_sd */
@@ -227,6 +231,7 @@ static void screen_buffer_dump( struct object *obj, int verbose );
 static void screen_buffer_destroy( struct object *obj );
 static int screen_buffer_signaled( struct object *obj, struct wait_queue_entry *entry );
 static struct fd *screen_buffer_get_fd( struct object *obj );
+static struct sync *screen_buffer_get_sync( struct object *obj );
 static struct object *screen_buffer_open_file( struct object *obj, unsigned int access,
                                                unsigned int sharing, unsigned int options );
 
@@ -245,6 +250,7 @@ static const struct object_ops screen_buffer_ops =
     &file_type,                       /* type */
     screen_buffer_dump,               /* dump */
     screen_buffer_get_fd,             /* get_fd */
+    screen_buffer_get_sync,           /* get_sync */
     default_map_access,               /* map_access */
     default_get_sd,                   /* get_sd */
     default_set_sd,                   /* set_sd */
@@ -289,6 +295,7 @@ static const struct object_ops console_device_ops =
     &device_type,                     /* type */
     console_device_dump,              /* dump */
     no_get_fd,                        /* get_fd */
+    no_get_sync,                      /* get_sync */
     default_map_access,               /* map_access */
     default_get_sd,                   /* get_sd */
     default_set_sd,                   /* set_sd */
@@ -315,6 +322,7 @@ static int console_input_signaled( struct object *obj, struct wait_queue_entry *
 static struct object *console_input_open_file( struct object *obj, unsigned int access,
                                                unsigned int sharing, unsigned int options );
 static struct fd *console_input_get_fd( struct object *obj );
+static struct sync *console_input_get_sync( struct object *obj );
 static void console_input_destroy( struct object *obj );
 
 static const struct sync_ops console_input_sync_ops =
@@ -332,6 +340,7 @@ static const struct object_ops console_input_ops =
     &device_type,                     /* type */
     console_input_dump,               /* dump */
     console_input_get_fd,             /* get_fd */
+    console_input_get_sync,           /* get_sync */
     default_map_access,               /* map_access */
     default_get_sd,                   /* get_sd */
     default_set_sd,                   /* set_sd */
@@ -376,6 +385,7 @@ struct console_output
 static void console_output_dump( struct object *obj, int verbose );
 static int console_output_signaled( struct object *obj, struct wait_queue_entry *entry );
 static struct fd *console_output_get_fd( struct object *obj );
+static struct sync *console_output_get_sync( struct object *obj );
 static struct object *console_output_open_file( struct object *obj, unsigned int access,
                                                 unsigned int sharing, unsigned int options );
 static void console_output_destroy( struct object *obj );
@@ -395,6 +405,7 @@ static const struct object_ops console_output_ops =
     &device_type,                     /* type */
     console_output_dump,              /* dump */
     console_output_get_fd,            /* get_fd */
+    console_output_get_sync,          /* get_sync */
     default_map_access,               /* map_access */
     default_get_sd,                   /* get_sd */
     default_set_sd,                   /* set_sd */
@@ -448,6 +459,7 @@ static const struct object_ops console_connection_ops =
     &device_type,                     /* type */
     console_connection_dump,          /* dump */
     console_connection_get_fd,        /* get_fd */
+    no_get_sync,                      /* get_sync */
     default_map_access,               /* map_access */
     default_get_sd,                   /* get_sd */
     default_set_sd,                   /* set_sd */
@@ -509,6 +521,13 @@ static struct fd *console_get_fd( struct object *obj )
     return (struct fd *)grab_object( console->fd );
 }
 
+static struct sync *console_get_sync( struct object *obj )
+{
+    struct console *console = (struct console *)obj;
+    assert( obj->ops == &console_ops );
+    return &console->obj.sync;
+}
+
 static enum server_fd_type console_get_fd_type( struct fd *fd )
 {
     return FD_TYPE_CHAR;
@@ -888,6 +907,13 @@ static struct fd *screen_buffer_get_fd( struct object *obj )
     return NULL;
 }
 
+static struct sync *screen_buffer_get_sync( struct object *obj )
+{
+    struct screen_buffer *screen_buffer = (struct screen_buffer *)obj;
+    assert( obj->ops == &screen_buffer_ops );
+    return &screen_buffer->obj.sync;
+}
+
 static void console_server_dump( struct object *obj, int verbose )
 {
     assert( obj->ops == &console_server_ops );
@@ -954,6 +980,13 @@ static struct fd *console_server_get_fd( struct object* obj )
     return (struct fd *)grab_object( server->fd );
 }
 
+static struct sync *console_server_get_sync( struct object *obj )
+{
+    struct console_server *server = (struct console_server *)obj;
+    assert( obj->ops == &console_server_ops );
+    return &server->obj.sync;
+}
+
 static struct object *console_server_open_file( struct object *obj, unsigned int access,
                                                 unsigned int sharing, unsigned int options )
 {
@@ -1449,6 +1482,13 @@ static struct fd *console_input_get_fd( struct object *obj )
     return (struct fd *)grab_object( console_input->fd );
 }
 
+static struct sync *console_input_get_sync( struct object *obj )
+{
+    struct console_input *console_input = (struct console_input *)obj;
+    assert( obj->ops == &console_input_ops );
+    return &console_input->obj.sync;
+}
+
 static struct object *console_input_open_file( struct object *obj, unsigned int access,
                                                unsigned int sharing, unsigned int options )
 {
@@ -1520,6 +1560,13 @@ static struct fd *console_output_get_fd( struct object *obj )
     return (struct fd *)grab_object( console_output->fd );
 }
 
+static struct sync *console_output_get_sync( struct object *obj )
+{
+    struct console_output *console_output = (struct console_output *)obj;
+    assert( obj->ops == &console_output_ops );
+    return &console_output->obj.sync;
+}
+
 static struct object *console_output_open_file( struct object *obj, unsigned int access,
                                                 unsigned int sharing, unsigned int options )
 {
diff --git a/server/debugger.c b/server/debugger.c
index 09c17712d17..8024556d77d 100644
--- a/server/debugger.c
+++ b/server/debugger.c
@@ -75,6 +75,7 @@ struct debug_obj
 
 
 static void debug_event_dump( struct object *obj, int verbose );
+static struct sync *debug_event_get_sync( struct object *obj );
 static int debug_event_signaled( struct object *obj, struct wait_queue_entry *entry );
 static void debug_event_destroy( struct object *obj );
 
@@ -93,6 +94,7 @@ static const struct object_ops debug_event_ops =
     &no_type,                      /* type */
     debug_event_dump,              /* dump */
     no_get_fd,                     /* get_fd */
+    debug_event_get_sync,          /* get_sync */
     default_map_access,            /* map_access */
     default_get_sd,                /* get_sd */
     default_set_sd,                /* set_sd */
@@ -107,6 +109,7 @@ static const struct object_ops debug_event_ops =
 };
 
 static void debug_obj_dump( struct object *obj, int verbose );
+static struct sync *debug_obj_get_sync( struct object *obj );
 static int debug_obj_signaled( struct object *obj, struct wait_queue_entry *entry );
 static void debug_obj_destroy( struct object *obj );
 
@@ -125,6 +128,7 @@ static const struct object_ops debug_obj_ops =
     &debug_obj_type,               /* type */
     debug_obj_dump,                /* dump */
     no_get_fd,                     /* get_fd */
+    debug_obj_get_sync,            /* get_sync */
     default_map_access,            /* map_access */
     default_get_sd,                /* get_sd */
     default_set_sd,                /* set_sd */
@@ -307,6 +311,13 @@ static void debug_event_dump( struct object *obj, int verbose )
              debug_event->sender, debug_event->data.code, debug_event->state );
 }
 
+static struct sync *debug_event_get_sync( struct object *obj )
+{
+    struct debug_event *debug_event = (struct debug_event *)obj;
+    assert( obj->ops == &debug_event_ops );
+    return &debug_event->obj.sync;
+}
+
 static int debug_event_signaled( struct object *obj, struct wait_queue_entry *entry )
 {
     struct debug_event *debug_event = (struct debug_event *)obj;
@@ -331,6 +342,13 @@ static void debug_obj_dump( struct object *obj, int verbose )
              debug_obj->event_queue.next, debug_obj->event_queue.prev );
 }
 
+static struct sync *debug_obj_get_sync( struct object *obj )
+{
+    struct debug_obj *debug_obj = (struct debug_obj *)obj;
+    assert( obj->ops == &debug_obj_ops );
+    return &debug_obj->obj.sync;
+}
+
 static int debug_obj_signaled( struct object *obj, struct wait_queue_entry *entry )
 {
     struct debug_obj *debug_obj = (struct debug_obj *)obj;
diff --git a/server/device.c b/server/device.c
index 13a6728939b..85e448447a0 100644
--- a/server/device.c
+++ b/server/device.c
@@ -64,6 +64,7 @@ static const struct object_ops irp_call_ops =
     &no_type,                         /* type */
     irp_call_dump,                    /* dump */
     no_get_fd,                        /* get_fd */
+    no_get_sync,                      /* get_sync */
     default_map_access,               /* map_access */
     default_get_sd,                   /* get_sd */
     default_set_sd,                   /* set_sd */
@@ -90,6 +91,7 @@ struct device_manager
 };
 
 static void device_manager_dump( struct object *obj, int verbose );
+static struct sync *device_manager_get_sync( struct object *obj );
 static int device_manager_signaled( struct object *obj, struct wait_queue_entry *entry );
 static void device_manager_destroy( struct object *obj );
 
@@ -108,6 +110,7 @@ static const struct object_ops device_manager_ops =
     &no_type,                         /* type */
     device_manager_dump,              /* dump */
     no_get_fd,                        /* get_fd */
+    device_manager_get_sync,          /* get_sync */
     default_map_access,               /* map_access */
     default_get_sd,                   /* get_sd */
     default_set_sd,                   /* set_sd */
@@ -160,6 +163,7 @@ static const struct object_ops device_ops =
     &device_type,                     /* type */
     device_dump,                      /* dump */
     no_get_fd,                        /* get_fd */
+    no_get_sync,                      /* get_sync */
     default_map_access,               /* map_access */
     default_get_sd,                   /* get_sd */
     default_set_sd,                   /* set_sd */
@@ -207,6 +211,7 @@ static const struct object_ops device_file_ops =
     &file_type,                       /* type */
     device_file_dump,                 /* dump */
     device_file_get_fd,               /* get_fd */
+    default_fd_get_sync,              /* get_sync */
     default_map_access,               /* map_access */
     default_get_sd,                   /* get_sd */
     default_set_sd,                   /* set_sd */
@@ -418,7 +423,6 @@ static struct object *device_open_file( struct object *obj, unsigned int access,
     struct unicode_str nt_name;
 
     if (!(file = alloc_object( &device_file_ops ))) return NULL;
-    file->obj.sync.ops = &default_fd_sync_ops;
     file->device = (struct device *)grab_object( device );
     file->closed = 0;
     list_init( &file->kernel_object );
@@ -765,6 +769,13 @@ static void device_manager_dump( struct object *obj, int verbose )
     fprintf( stderr, "Device manager\n" );
 }
 
+static struct sync *device_manager_get_sync( struct object *obj )
+{
+    struct device_manager *manager = (struct device_manager *)obj;
+    assert( obj->ops == &device_manager_ops );
+    return &manager->obj.sync;
+}
+
 static int device_manager_signaled( struct object *obj, struct wait_queue_entry *entry )
 {
     struct device_manager *manager = (struct device_manager *)obj;
diff --git a/server/directory.c b/server/directory.c
index 6abd7e5c238..70f62263d35 100644
--- a/server/directory.c
+++ b/server/directory.c
@@ -67,6 +67,7 @@ static const struct object_ops object_type_ops =
     &objtype_type,                /* type */
     object_type_dump,             /* dump */
     no_get_fd,                    /* get_fd */
+    no_get_sync,                  /* get_sync */
     default_map_access,           /* map_access */
     default_get_sd,               /* get_sd */
     default_set_sd,               /* set_sd */
@@ -112,6 +113,7 @@ static const struct object_ops directory_ops =
     &directory_type,              /* type */
     directory_dump,               /* dump */
     no_get_fd,                    /* get_fd */
+    no_get_sync,                  /* get_sync */
     default_map_access,           /* map_access */
     default_get_sd,               /* get_sd */
     default_set_sd,               /* set_sd */
diff --git a/server/event.c b/server/event.c
index f9aa2d6244d..eeba7fcaf58 100644
--- a/server/event.c
+++ b/server/event.c
@@ -59,6 +59,7 @@ struct event
 };
 
 static void event_dump( struct object *obj, int verbose );
+static struct sync *event_get_sync( struct object *obj );
 static int event_signaled( struct object *obj, struct wait_queue_entry *entry );
 static void event_satisfied( struct object *obj, struct wait_queue_entry *entry );
 static int event_signal( struct object *obj, unsigned int access);
@@ -79,6 +80,7 @@ static const struct object_ops event_ops =
     &event_type,               /* type */
     event_dump,                /* dump */
     no_get_fd,                 /* get_fd */
+    event_get_sync,            /* get_sync */
     default_map_access,        /* map_access */
     default_get_sd,            /* get_sd */
     default_set_sd,            /* set_sd */
@@ -113,6 +115,7 @@ struct keyed_event
 };
 
 static void keyed_event_dump( struct object *obj, int verbose );
+static struct sync *keyed_event_get_sync( struct object *obj );
 static int keyed_event_signaled( struct object *obj, struct wait_queue_entry *entry );
 
 static const struct sync_ops keyed_event_sync_ops =
@@ -130,6 +133,7 @@ static const struct object_ops keyed_event_ops =
     &keyed_event_type,           /* type */
     keyed_event_dump,            /* dump */
     no_get_fd,                   /* get_fd */
+    keyed_event_get_sync,        /* get_sync */
     default_map_access,          /* map_access */
     default_get_sd,              /* get_sd */
     default_set_sd,              /* set_sd */
@@ -197,6 +201,13 @@ static void event_dump( struct object *obj, int verbose )
              event->manual_reset, event->signaled );
 }
 
+static struct sync *event_get_sync( struct object *obj )
+{
+    struct event *event = (struct event *)obj;
+    assert( obj->ops == &event_ops );
+    return &event->obj.sync;
+}
+
 static int event_signaled( struct object *obj, struct wait_queue_entry *entry )
 {
     struct event *event = (struct event *)obj;
@@ -258,6 +269,13 @@ static void keyed_event_dump( struct object *obj, int verbose )
     fputs( "Keyed event\n", stderr );
 }
 
+static struct sync *keyed_event_get_sync( struct object *obj )
+{
+    struct keyed_event *event = (struct keyed_event *)obj;
+    assert( obj->ops == &keyed_event_ops );
+    return &event->obj.sync;
+}
+
 static enum select_opcode matching_op( enum select_opcode op )
 {
     return op ^ (SELECT_KEYED_EVENT_WAIT ^ SELECT_KEYED_EVENT_RELEASE);
diff --git a/server/fd.c b/server/fd.c
index b9366ee69e0..7859d9adbcd 100644
--- a/server/fd.c
+++ b/server/fd.c
@@ -157,14 +157,15 @@ struct fd
 };
 
 static void fd_dump( struct object *obj, int verbose );
-static int default_fd_signaled( struct object *obj, struct wait_queue_entry *entry );
+static struct sync *fd_get_sync( struct object *obj );
+static int fd_signaled( struct object *obj, struct wait_queue_entry *entry );
 static void fd_destroy( struct object *obj );
 
-const struct sync_ops default_fd_sync_ops =
+const struct sync_ops fd_sync_ops =
 {
     add_queue,                    /* add_queue */
     remove_queue,                 /* remove_queue */
-    default_fd_signaled,          /* signaled */
+    fd_signaled,                  /* signaled */
     no_satisfied,                 /* satisfied */
     no_signal,                    /* signal */
 };
@@ -175,6 +176,7 @@ static const struct object_ops fd_ops =
     &no_type,                 /* type */
     fd_dump,                  /* dump */
     no_get_fd,                /* get_fd */
+    fd_get_sync,              /* get_sync */
     default_map_access,       /* map_access */
     default_get_sd,           /* get_sd */
     default_set_sd,           /* set_sd */
@@ -211,6 +213,7 @@ static const struct object_ops device_ops =
     &no_type,                 /* type */
     device_dump,              /* dump */
     no_get_fd,                /* get_fd */
+    no_get_sync,              /* get_sync */
     default_map_access,       /* map_access */
     default_get_sd,           /* get_sd */
     default_set_sd,           /* set_sd */
@@ -246,6 +249,7 @@ static const struct object_ops inode_ops =
     &no_type,                 /* type */
     inode_dump,               /* dump */
     no_get_fd,                /* get_fd */
+    no_get_sync,              /* get_sync */
     default_map_access,       /* map_access */
     default_get_sd,           /* get_sd */
     default_set_sd,           /* set_sd */
@@ -275,6 +279,7 @@ struct file_lock
 };
 
 static void file_lock_dump( struct object *obj, int verbose );
+static struct sync *file_lock_get_sync( struct object *obj );
 static int file_lock_signaled( struct object *obj, struct wait_queue_entry *entry );
 
 static const struct sync_ops file_lock_sync_ops =
@@ -292,6 +297,7 @@ static const struct object_ops file_lock_ops =
     &no_type,                   /* type */
     file_lock_dump,             /* dump */
     no_get_fd,                  /* get_fd */
+    file_lock_get_sync,         /* get_sync */
     default_map_access,         /* map_access */
     default_get_sd,             /* get_sd */
     default_set_sd,             /* set_sd */
@@ -1235,6 +1241,13 @@ static void file_lock_dump( struct object *obj, int verbose )
     fprintf( stderr, "\n" );
 }
 
+static struct sync *file_lock_get_sync( struct object *obj )
+{
+    struct file_lock *lock = (struct file_lock *)obj;
+    assert( obj->ops == &file_lock_ops );
+    return &lock->obj.sync;
+}
+
 static int file_lock_signaled( struct object *obj, struct wait_queue_entry *entry )
 {
     struct file_lock *lock = (struct file_lock *)obj;
@@ -1560,6 +1573,12 @@ static void fd_dump( struct object *obj, int verbose )
     fprintf( stderr, "\n" );
 }
 
+static struct sync *fd_get_sync( struct object *obj )
+{
+    struct fd *fd = (struct fd *)obj;
+    return &fd->obj.sync;
+}
+
 static void fd_destroy( struct object *obj )
 {
     struct fd *fd = (struct fd *)obj;
@@ -1679,10 +1698,10 @@ static inline void unmount_fd( struct fd *fd )
 /* allocate an fd object, without setting the unix fd yet */
 static struct fd *alloc_fd_object(void)
 {
-    struct fd *fd = alloc_object( &fd_ops );
-
-    if (!fd) return NULL;
+    struct fd *fd;
 
+    if (!(fd = alloc_object( &fd_ops ))) return NULL;
+    fd->obj.sync.ops = &fd_sync_ops;
     fd->fd_ops     = NULL;
     fd->user       = NULL;
     fd->inode      = NULL;
@@ -1719,10 +1738,10 @@ static struct fd *alloc_fd_object(void)
 /* allocate a pseudo fd object, for objects that need to behave like files but don't have a unix fd */
 struct fd *alloc_pseudo_fd( const struct fd_ops *fd_user_ops, struct object *user, unsigned int options )
 {
-    struct fd *fd = alloc_object( &fd_ops );
-
-    if (!fd) return NULL;
+    struct fd *fd;
 
+    if (!(fd = alloc_object( &fd_ops ))) return NULL;
+    fd->obj.sync.ops = &fd_sync_ops;
     fd->fd_ops     = fd_user_ops;
     fd->user       = user;
     fd->inode      = NULL;
@@ -2152,7 +2171,7 @@ void set_fd_signaled( struct fd *fd, int signaled )
 {
     if (fd->comp_flags & FILE_SKIP_SET_EVENT_ON_HANDLE) return;
     fd->signaled = signaled;
-    if (signaled) wake_up( fd->user, 0 );
+    if (signaled) wake_up( &fd->obj, 0 );
 }
 
 /* check if events are pending and if yes return which one(s) */
@@ -2169,13 +2188,20 @@ int check_fd_events( struct fd *fd, int events )
     return pfd.revents;
 }
 
-/* default signaled() routine for objects that poll() on an fd */
-static int default_fd_signaled( struct object *obj, struct wait_queue_entry *entry )
+static int fd_signaled( struct object *obj, struct wait_queue_entry *entry )
+{
+    struct fd *fd = (struct fd *)obj;
+    assert( obj->ops == &fd_ops );
+    return fd->signaled;
+}
+
+/* default get_sync() routine for objects that poll() on an fd */
+struct sync *default_fd_get_sync( struct object *obj )
 {
     struct fd *fd = get_obj_fd( obj );
-    int ret = fd->signaled;
+    struct sync *sync = &fd->obj.sync;
     release_object( fd );
-    return ret;
+    return sync;
 }
 
 int default_fd_get_poll_events( struct fd *fd )
diff --git a/server/file.c b/server/file.c
index 666b1a6f55e..d1d695b934c 100644
--- a/server/file.c
+++ b/server/file.c
@@ -92,6 +92,7 @@ static const struct object_ops file_ops =
     &file_type,                   /* type */
     file_dump,                    /* dump */
     file_get_fd,                  /* get_fd */
+    default_fd_get_sync,          /* get_sync */
     default_map_access,           /* map_access */
     file_get_sd,                  /* get_sd */
     file_set_sd,                  /* set_sd */
@@ -140,7 +141,6 @@ struct file *create_file_for_fd( int fd, unsigned int access, unsigned int shari
         close( fd );
         return NULL;
     }
-    file->obj.sync.ops = &default_fd_sync_ops;
     file->mode = st.st_mode;
     file->access = default_map_access( &file->obj, access );
     list_init( &file->kernel_object );
@@ -168,7 +168,6 @@ struct file *create_file_for_fd_obj( struct fd *fd, unsigned int access, unsigne
 
     if ((file = alloc_object( &file_ops )))
     {
-        file->obj.sync.ops = &default_fd_sync_ops;
         file->mode = st.st_mode;
         file->access = default_map_access( &file->obj, access );
         list_init( &file->kernel_object );
@@ -187,7 +186,6 @@ static struct object *create_file_obj( struct fd *fd, unsigned int access, mode_
     struct file *file;
 
     if (!(file = alloc_object( &file_ops ))) return NULL;
-    file->obj.sync.ops = &default_fd_sync_ops;
     file->access  = access;
     file->mode    = mode;
     file->uid     = ~(uid_t)0;
diff --git a/server/file.h b/server/file.h
index 66a67ec4a16..06622c40783 100644
--- a/server/file.h
+++ b/server/file.h
@@ -109,6 +109,7 @@ extern void set_fd_signaled( struct fd *fd, int signaled );
 extern char *dup_fd_name( struct fd *root, const char *name ) __WINE_DEALLOC(free) __WINE_MALLOC;
 extern void get_nt_name( struct fd *fd, struct unicode_str *name );
 
+extern struct sync *default_fd_get_sync( struct object *obj );
 extern int default_fd_get_poll_events( struct fd *fd );
 extern void default_poll_event( struct fd *fd, int event );
 extern void fd_cancel_async( struct fd *fd, struct async *async );
@@ -132,8 +133,6 @@ extern void remove_process_locks( struct process *process );
 
 static inline struct fd *get_obj_fd( struct object *obj ) { return obj->ops->get_fd( obj ); }
 
-extern const struct sync_ops default_fd_sync_ops;
-
 /* timeout functions */
 
 struct timeout_user;
diff --git a/server/handle.c b/server/handle.c
index 39dad955ed2..38d9f87b5a3 100644
--- a/server/handle.c
+++ b/server/handle.c
@@ -124,6 +124,7 @@ static const struct object_ops handle_table_ops =
     &no_type,                        /* type */
     handle_table_dump,               /* dump */
     no_get_fd,                       /* get_fd */
+    no_get_sync,                     /* get_sync */
     default_map_access,              /* map_access */
     default_get_sd,                  /* get_sd */
     default_set_sd,                  /* set_sd */
diff --git a/server/hook.c b/server/hook.c
index 45e185f9896..2cc321310f4 100644
--- a/server/hook.c
+++ b/server/hook.c
@@ -79,6 +79,7 @@ static const struct object_ops hook_table_ops =
     &no_type,                     /* type */
     hook_table_dump,              /* dump */
     no_get_fd,                    /* get_fd */
+    no_get_sync,                  /* get_sync */
     default_map_access,           /* map_access */
     default_get_sd,               /* get_sd */
     default_set_sd,               /* set_sd */
diff --git a/server/mailslot.c b/server/mailslot.c
index 3d338b06e71..5970af120f5 100644
--- a/server/mailslot.c
+++ b/server/mailslot.c
@@ -79,6 +79,7 @@ static const struct object_ops mailslot_ops =
     &file_type,                /* type */
     mailslot_dump,             /* dump */
     mailslot_get_fd,           /* get_fd */
+    default_fd_get_sync,       /* get_sync */
     mailslot_map_access,       /* map_access */
     default_get_sd,            /* get_sd */
     default_set_sd,            /* set_sd */
@@ -135,6 +136,7 @@ static const struct object_ops mail_writer_ops =
     &file_type,                 /* type */
     mail_writer_dump,           /* dump */
     mail_writer_get_fd,         /* get_fd */
+    no_get_sync,                /* get_sync */
     mail_writer_map_access,     /* map_access */
     default_get_sd,             /* get_sd */
     default_set_sd,             /* set_sd */
@@ -195,6 +197,7 @@ static const struct object_ops mailslot_device_ops =
     &device_type,                   /* type */
     mailslot_device_dump,           /* dump */
     no_get_fd,                      /* get_fd */
+    no_get_sync,                    /* get_sync */
     default_map_access,             /* map_access */
     default_get_sd,                 /* get_sd */
     default_set_sd,                 /* set_sd */
@@ -220,6 +223,7 @@ static const struct object_ops mailslot_device_file_ops =
     &file_type,                             /* type */
     mailslot_device_file_dump,              /* dump */
     mailslot_device_file_get_fd,            /* get_fd */
+    default_fd_get_sync,                    /* get_sync */
     default_map_access,                     /* map_access */
     default_get_sd,                         /* get_sd */
     default_set_sd,                         /* set_sd */
@@ -463,7 +467,6 @@ static struct object *mailslot_device_open_file( struct object *obj, unsigned in
     struct mailslot_device_file *file;
 
     if (!(file = alloc_object( &mailslot_device_file_ops ))) return NULL;
-    file->obj.sync.ops = &default_fd_sync_ops;
     file->device = (struct mailslot_device *)grab_object( obj );
     if (!(file->fd = alloc_pseudo_fd( &mailslot_device_fd_ops, obj, options )))
     {
@@ -539,7 +542,6 @@ static struct mailslot *create_mailslot( struct object *root,
     struct mailslot *mailslot;
 
     if (!(mailslot = create_named_object( root, &mailslot_ops, name, attr & ~OBJ_OPENIF, sd ))) return NULL;
-    mailslot->obj.sync.ops = &default_fd_sync_ops;
     mailslot->fd = NULL;
     mailslot->max_msgsize = max_msgsize;
     mailslot->read_timeout = read_timeout;
diff --git a/server/mapping.c b/server/mapping.c
index a755577a77f..6fb2d4f3a01 100644
--- a/server/mapping.c
+++ b/server/mapping.c
@@ -65,6 +65,7 @@ static const struct object_ops ranges_ops =
     &no_type,                  /* type */
     ranges_dump,               /* dump */
     no_get_fd,                 /* get_fd */
+    no_get_sync,               /* get_sync */
     default_map_access,        /* map_access */
     default_get_sd,            /* get_sd */
     default_set_sd,            /* set_sd */
@@ -96,6 +97,7 @@ static const struct object_ops shared_map_ops =
     &no_type,                  /* type */
     shared_map_dump,           /* dump */
     no_get_fd,                 /* get_fd */
+    no_get_sync,               /* get_sync */
     default_map_access,        /* map_access */
     default_get_sd,            /* get_sd */
     default_set_sd,            /* set_sd */
@@ -164,6 +166,7 @@ static const struct object_ops mapping_ops =
     &mapping_type,               /* type */
     mapping_dump,                /* dump */
     mapping_get_fd,              /* get_fd */
+    no_get_sync,                 /* get_sync */
     default_map_access,          /* map_access */
     default_get_sd,              /* get_sd */
     default_set_sd,              /* set_sd */
diff --git a/server/mutex.c b/server/mutex.c
index 5b7184e6913..f2ddbe9cc1e 100644
--- a/server/mutex.c
+++ b/server/mutex.c
@@ -60,6 +60,7 @@ struct mutex
 };
 
 static void mutex_dump( struct object *obj, int verbose );
+static struct sync *mutex_get_sync( struct object *obj );
 static int mutex_signaled( struct object *obj, struct wait_queue_entry *entry );
 static void mutex_satisfied( struct object *obj, struct wait_queue_entry *entry );
 static void mutex_destroy( struct object *obj );
@@ -80,6 +81,7 @@ static const struct object_ops mutex_ops =
     &mutex_type,               /* type */
     mutex_dump,                /* dump */
     no_get_fd,                 /* get_fd */
+    mutex_get_sync,            /* get_sync */
     default_map_access,        /* map_access */
     default_get_sd,            /* get_sd */
     default_set_sd,            /* set_sd */
@@ -158,6 +160,13 @@ static void mutex_dump( struct object *obj, int verbose )
     fprintf( stderr, "Mutex count=%u owner=%p\n", mutex->count, mutex->owner );
 }
 
+static struct sync *mutex_get_sync( struct object *obj )
+{
+    struct mutex *mutex = (struct mutex *)obj;
+    assert( obj->ops == &mutex_ops );
+    return &mutex->obj.sync;
+}
+
 static int mutex_signaled( struct object *obj, struct wait_queue_entry *entry )
 {
     struct mutex *mutex = (struct mutex *)obj;
diff --git a/server/named_pipe.c b/server/named_pipe.c
index a281e908fe6..88f17f74713 100644
--- a/server/named_pipe.c
+++ b/server/named_pipe.c
@@ -117,6 +117,7 @@ static const struct object_ops named_pipe_ops =
     &no_type,                     /* type */
     named_pipe_dump,              /* dump */
     no_get_fd,                    /* get_fd */
+    no_get_sync,                  /* get_sync */
     named_pipe_map_access,        /* map_access */
     default_get_sd,               /* get_sd */
     default_set_sd,               /* set_sd */
@@ -160,6 +161,7 @@ static const struct object_ops pipe_server_ops =
     &file_type,                   /* type */
     pipe_server_dump,             /* dump */
     pipe_end_get_fd,              /* get_fd */
+    default_fd_get_sync,          /* get_sync */
     default_map_access,           /* map_access */
     pipe_end_get_sd,              /* get_sd */
     pipe_end_set_sd,              /* set_sd */
@@ -199,6 +201,7 @@ static const struct object_ops pipe_client_ops =
     &file_type,                   /* type */
     pipe_client_dump,             /* dump */
     pipe_end_get_fd,              /* get_fd */
+    default_fd_get_sync,          /* get_sync */
     default_map_access,           /* map_access */
     pipe_end_get_sd,              /* get_sd */
     pipe_end_set_sd,              /* set_sd */
@@ -241,6 +244,7 @@ static const struct object_ops named_pipe_device_ops =
     &device_type,                     /* type */
     named_pipe_device_dump,           /* dump */
     no_get_fd,                        /* get_fd */
+    no_get_sync,                      /* get_sync */
     default_map_access,               /* map_access */
     default_get_sd,                   /* get_sd */
     default_set_sd,                   /* set_sd */
@@ -267,6 +271,7 @@ static const struct object_ops named_pipe_device_file_ops =
     &file_type,                              /* type */
     named_pipe_device_file_dump,             /* dump */
     named_pipe_device_file_get_fd,           /* get_fd */
+    default_fd_get_sync,                     /* get_sync */
     default_map_access,                      /* map_access */
     default_get_sd,                          /* get_sd */
     default_set_sd,                          /* set_sd */
@@ -312,6 +317,7 @@ static const struct object_ops named_pipe_dir_ops =
     &file_type,                              /* type */
     named_pipe_dir_dump,                     /* dump */
     named_pipe_dir_get_fd,                   /* get_fd */
+    default_fd_get_sync,                     /* get_sync */
     default_map_access,                      /* map_access */
     default_get_sd,                          /* get_sd */
     default_set_sd,                          /* set_sd */
@@ -527,7 +533,6 @@ static struct object *named_pipe_device_lookup_name( struct object *obj, struct
         struct named_pipe_device_file *dir;
 
         if (!(dir = alloc_object( &named_pipe_dir_ops ))) return NULL;
-        dir->obj.sync.ops = &default_fd_sync_ops;
         dir->fd = NULL;  /* defer alloc_pseudo_fd() until after we have options */
         dir->device = (struct named_pipe_device *)grab_object( obj );
 
@@ -546,7 +551,6 @@ static struct object *named_pipe_device_open_file( struct object *obj, unsigned
     struct named_pipe_device_file *file;
 
     if (!(file = alloc_object( &named_pipe_device_file_ops ))) return NULL;
-    file->obj.sync.ops = &default_fd_sync_ops;
     file->device = (struct named_pipe_device *)grab_object( obj );
     if (!(file->fd = alloc_pseudo_fd( &named_pipe_device_fd_ops, obj, options )))
     {
@@ -1378,7 +1382,6 @@ static struct pipe_server *create_pipe_server( struct named_pipe *pipe, unsigned
     struct pipe_server *server;
 
     if (!(server = alloc_object( &pipe_server_ops ))) return NULL;
-    server->pipe_end.obj.sync.ops = &default_fd_sync_ops;
     server->options = options;
     init_pipe_end( &server->pipe_end, pipe, pipe_flags, pipe->insize );
     server->pipe_end.state = FILE_PIPE_LISTENING_STATE;
@@ -1402,7 +1405,6 @@ static struct pipe_end *create_pipe_client( struct named_pipe *pipe, data_size_t
     struct pipe_end *client;
 
     if (!(client = alloc_object( &pipe_client_ops ))) return NULL;
-    client->obj.sync.ops = &default_fd_sync_ops;
     init_pipe_end( client, pipe, 0, buffer_size );
     client->state = FILE_PIPE_CONNECTED_STATE;
     client->client_pid = get_process_id( current->process );
diff --git a/server/object.c b/server/object.c
index 70f83870bf7..302bbb53523 100644
--- a/server/object.c
+++ b/server/object.c
@@ -106,6 +106,7 @@ static const struct object_ops apc_reserve_ops =
     &apc_reserve_type,          /* type */
     dump_reserve,               /* dump */
     no_get_fd,                  /* get_fd */
+    no_get_sync,                /* get_sync */
     default_map_access,         /* map_access */
     default_get_sd,             /* get_sd */
     default_set_sd,             /* set_sd */
@@ -125,6 +126,7 @@ static const struct object_ops completion_reserve_ops =
     &completion_reserve_type,  /* type */
     dump_reserve,              /* dump */
     no_get_fd,                 /* get_fd */
+    no_get_sync,               /* get_sync */
     default_map_access,        /* map_access */
     default_get_sd,            /* get_sd */
     default_set_sd,            /* set_sd */
@@ -294,6 +296,11 @@ static const struct sync_ops no_sync_ops =
     no_signal,                      /* signal */
 };
 
+static struct sync no_sync =
+{
+    &no_sync_ops,
+};
+
 /* allocate and initialize an object */
 void *alloc_object( const struct object_ops *ops )
 {
@@ -639,6 +646,11 @@ struct fd *no_get_fd( struct object *obj )
     return NULL;
 }
 
+struct sync *no_get_sync( struct object *obj )
+{
+    return &no_sync;
+}
+
 unsigned int default_map_access( struct object *obj, unsigned int access )
 {
     return map_access( access, &obj->ops->type->mapping );
diff --git a/server/object.h b/server/object.h
index 199ce98ed65..3db4f3d56cb 100644
--- a/server/object.h
+++ b/server/object.h
@@ -94,6 +94,8 @@ struct object_ops
     void (*dump)(struct object *,int);
     /* return an fd object that can be used to read/write from the object */
     struct fd *(*get_fd)(struct object *);
+    /* return a sync that can be used to wait/signal the object */
+    struct sync *(*get_sync)(struct object *);
     /* map access rights to the specific rights for this object */
     unsigned int (*map_access)(struct object *, unsigned int);
     /* returns the security descriptor of the object */
@@ -181,6 +183,7 @@ extern int no_add_queue( struct object *obj, struct wait_queue_entry *entry );
 extern void no_satisfied( struct object *obj, struct wait_queue_entry *entry );
 extern int no_signal( struct object *obj, unsigned int access );
 extern struct fd *no_get_fd( struct object *obj );
+extern struct sync *no_get_sync( struct object *obj );
 extern unsigned int default_map_access( struct object *obj, unsigned int access );
 extern struct security_descriptor *default_get_sd( struct object *obj );
 extern int default_set_sd( struct object *obj, const struct security_descriptor *sd, unsigned int set_info );
diff --git a/server/process.c b/server/process.c
index 19ece8c56c4..eac2df227c9 100644
--- a/server/process.c
+++ b/server/process.c
@@ -89,6 +89,7 @@ struct type_descr process_type =
 };
 
 static void process_dump( struct object *obj, int verbose );
+static struct sync *process_get_sync( struct object *obj );
 static int process_signaled( struct object *obj, struct wait_queue_entry *entry );
 static unsigned int process_map_access( struct object *obj, unsigned int access );
 static struct security_descriptor *process_get_sd( struct object *obj );
@@ -112,6 +113,7 @@ static const struct object_ops process_ops =
     &process_type,               /* type */
     process_dump,                /* dump */
     no_get_fd,                   /* get_fd */
+    process_get_sync,            /* get_sync */
     process_map_access,          /* map_access */
     process_get_sd,              /* get_sd */
     default_set_sd,              /* set_sd */
@@ -149,6 +151,7 @@ struct startup_info
 };
 
 static void startup_info_dump( struct object *obj, int verbose );
+static struct sync *startup_info_get_sync( struct object *obj );
 static int startup_info_signaled( struct object *obj, struct wait_queue_entry *entry );
 static void startup_info_destroy( struct object *obj );
 
@@ -167,6 +170,7 @@ static const struct object_ops startup_info_ops =
     &no_type,                      /* type */
     startup_info_dump,             /* dump */
     no_get_fd,                     /* get_fd */
+    startup_info_get_sync,         /* get_sync */
     default_map_access,            /* map_access */
     default_get_sd,                /* get_sd */
     default_set_sd,                /* set_sd */
@@ -197,6 +201,7 @@ struct type_descr job_type =
 };
 
 static void job_dump( struct object *obj, int verbose );
+static struct sync *job_get_sync( struct object *obj );
 static int job_signaled( struct object *obj, struct wait_queue_entry *entry );
 static int job_close_handle( struct object *obj, struct process *process, obj_handle_t handle );
 static void job_destroy( struct object *obj );
@@ -232,6 +237,7 @@ static const struct object_ops job_ops =
     &job_type,                     /* type */
     job_dump,                      /* dump */
     no_get_fd,                     /* get_fd */
+    job_get_sync,                  /* get_sync */
     default_map_access,            /* map_access */
     default_get_sd,                /* get_sd */
     default_set_sd,                /* set_sd */
@@ -462,6 +468,13 @@ static void job_dump( struct object *obj, int verbose )
              list_count(&job->process_list), list_count(&job->child_job_list), job->parent );
 }
 
+static struct sync *job_get_sync( struct object *obj )
+{
+    struct job *job = (struct job *)obj;
+    assert( obj->ops == &job_ops );
+    return &job->obj.sync;
+}
+
 static int job_signaled( struct object *obj, struct wait_queue_entry *entry )
 {
     struct job *job = (struct job *)obj;
@@ -809,6 +822,13 @@ static void process_dump( struct object *obj, int verbose )
     fprintf( stderr, "Process id=%04x handles=%p\n", process->id, process->handles );
 }
 
+static struct sync *process_get_sync( struct object *obj )
+{
+    struct process *process = (struct process *)obj;
+    assert( obj->ops == &process_ops );
+    return &process->obj.sync;
+}
+
 static int process_signaled( struct object *obj, struct wait_queue_entry *entry )
 {
     struct process *process = (struct process *)obj;
@@ -899,6 +919,13 @@ static void startup_info_dump( struct object *obj, int verbose )
     fputc( '\n', stderr );
 }
 
+static struct sync *startup_info_get_sync( struct object *obj )
+{
+    struct startup_info *info = (struct startup_info *)obj;
+    assert( obj->ops == &startup_info_ops );
+    return &info->obj.sync;
+}
+
 static int startup_info_signaled( struct object *obj, struct wait_queue_entry *entry )
 {
     struct startup_info *info = (struct startup_info *)obj;
diff --git a/server/queue.c b/server/queue.c
index 7146ee51a2c..f607fafa882 100644
--- a/server/queue.c
+++ b/server/queue.c
@@ -147,6 +147,7 @@ struct hotkey
 };
 
 static void msg_queue_dump( struct object *obj, int verbose );
+static struct sync *msg_queue_get_sync( struct object *obj );
 static int msg_queue_add_queue( struct object *obj, struct wait_queue_entry *entry );
 static void msg_queue_remove_queue( struct object *obj, struct wait_queue_entry *entry );
 static int msg_queue_signaled( struct object *obj, struct wait_queue_entry *entry );
@@ -172,6 +173,7 @@ static const struct object_ops msg_queue_ops =
     &no_type,                  /* type */
     msg_queue_dump,            /* dump */
     no_get_fd,                 /* get_fd */
+    msg_queue_get_sync,        /* get_sync */
     default_map_access,        /* map_access */
     default_get_sd,            /* get_sd */
     default_set_sd,            /* set_sd */
@@ -204,6 +206,7 @@ static const struct object_ops thread_input_ops =
     &no_type,                     /* type */
     thread_input_dump,            /* dump */
     no_get_fd,                    /* get_fd */
+    no_get_sync,                  /* get_sync */
     default_map_access,           /* map_access */
     default_get_sd,               /* get_sd */
     default_set_sd,               /* set_sd */
@@ -1305,6 +1308,13 @@ static void msg_queue_dump( struct object *obj, int verbose )
              queue_shm->wake_bits, queue_shm->wake_mask );
 }
 
+static struct sync *msg_queue_get_sync( struct object *obj )
+{
+    struct msg_queue *queue = (struct msg_queue *)obj;
+    assert( obj->ops == &msg_queue_ops );
+    return &queue->obj.sync;
+}
+
 static int msg_queue_signaled( struct object *obj, struct wait_queue_entry *entry )
 {
     struct msg_queue *queue = (struct msg_queue *)obj;
diff --git a/server/registry.c b/server/registry.c
index bd80d3e7399..169833f53e6 100644
--- a/server/registry.c
+++ b/server/registry.c
@@ -178,6 +178,7 @@ static const struct object_ops key_ops =
     &key_type,               /* type */
     key_dump,                /* dump */
     no_get_fd,               /* get_fd */
+    no_get_sync,             /* get_sync */
     key_map_access,          /* map_access */
     key_get_sd,              /* get_sd */
     default_set_sd,          /* set_sd */
diff --git a/server/request.c b/server/request.c
index 474750523bf..83ecdff286e 100644
--- a/server/request.c
+++ b/server/request.c
@@ -87,6 +87,7 @@ static const struct object_ops master_socket_ops =
     &no_type,                      /* type */
     master_socket_dump,            /* dump */
     no_get_fd,                     /* get_fd */
+    no_get_sync,                   /* get_sync */
     default_map_access,            /* map_access */
     default_get_sd,                /* get_sd */
     default_set_sd,                /* set_sd */
diff --git a/server/semaphore.c b/server/semaphore.c
index 7c7de0f77f7..3ac9ff23a2d 100644
--- a/server/semaphore.c
+++ b/server/semaphore.c
@@ -58,6 +58,7 @@ struct semaphore
 };
 
 static void semaphore_dump( struct object *obj, int verbose );
+static struct sync *semaphore_get_sync( struct object *obj );
 static int semaphore_signaled( struct object *obj, struct wait_queue_entry *entry );
 static void semaphore_satisfied( struct object *obj, struct wait_queue_entry *entry );
 static int semaphore_signal( struct object *obj, unsigned int access );
@@ -77,6 +78,7 @@ static const struct object_ops semaphore_ops =
     &semaphore_type,               /* type */
     semaphore_dump,                /* dump */
     no_get_fd,                     /* get_fd */
+    semaphore_get_sync,            /* get_sync */
     default_map_access,            /* map_access */
     default_get_sd,                /* get_sd */
     default_set_sd,                /* set_sd */
@@ -144,6 +146,13 @@ static void semaphore_dump( struct object *obj, int verbose )
     fprintf( stderr, "Semaphore count=%d max=%d\n", sem->count, sem->max );
 }
 
+static struct sync *semaphore_get_sync( struct object *obj )
+{
+    struct semaphore *semaphore = (struct semaphore *)obj;
+    assert( obj->ops == &semaphore_ops );
+    return &semaphore->obj.sync;
+}
+
 static int semaphore_signaled( struct object *obj, struct wait_queue_entry *entry )
 {
     struct semaphore *sem = (struct semaphore *)obj;
diff --git a/server/serial.c b/server/serial.c
index aedc962174a..5f29dff7948 100644
--- a/server/serial.c
+++ b/server/serial.c
@@ -89,6 +89,7 @@ static const struct object_ops serial_ops =
     &file_type,                   /* type */
     serial_dump,                  /* dump */
     serial_get_fd,                /* get_fd */
+    default_fd_get_sync,          /* get_sync */
     default_map_access,           /* map_access */
     default_get_sd,               /* get_sd */
     default_set_sd,               /* set_sd */
@@ -132,7 +133,6 @@ struct object *create_serial( struct fd *fd )
     struct serial *serial;
 
     if (!(serial = alloc_object( &serial_ops ))) return NULL;
-    serial->obj.sync.ops = &default_fd_sync_ops;
     serial->read_timer   = NULL;
     serial->eventmask    = 0;
     serial->pending_write = 0;
diff --git a/server/signal.c b/server/signal.c
index 8016c507367..6b18d5f2412 100644
--- a/server/signal.c
+++ b/server/signal.c
@@ -60,6 +60,7 @@ static const struct object_ops handler_ops =
     &no_type,                 /* type */
     handler_dump,             /* dump */
     no_get_fd,                /* get_fd */
+    no_get_sync,              /* get_sync */
     default_map_access,       /* map_access */
     default_get_sd,           /* get_sd */
     default_set_sd,           /* set_sd */
diff --git a/server/sock.c b/server/sock.c
index 4dd973ae7d8..fc7a181534e 100644
--- a/server/sock.c
+++ b/server/sock.c
@@ -484,6 +484,7 @@ static const struct object_ops sock_ops =
     &file_type,                   /* type */
     sock_dump,                    /* dump */
     sock_get_fd,                  /* get_fd */
+    default_fd_get_sync,          /* get_sync */
     default_map_access,           /* map_access */
     default_get_sd,               /* get_sd */
     default_set_sd,               /* set_sd */
@@ -1777,7 +1778,6 @@ static struct sock *create_socket(void)
     struct sock *sock;
 
     if (!(sock = alloc_object( &sock_ops ))) return NULL;
-    sock->obj.sync.ops = &default_fd_sync_ops;
     sock->fd      = NULL;
     sock->state   = SOCK_UNCONNECTED;
     sock->mask    = 0;
@@ -3689,6 +3689,7 @@ static const struct object_ops ifchange_ops =
     &no_type,                /* type */
     ifchange_dump,           /* dump */
     ifchange_get_fd,         /* get_fd */
+    no_get_sync,             /* get_sync */
     default_map_access,      /* map_access */
     default_get_sd,          /* get_sd */
     default_set_sd,          /* set_sd */
@@ -3905,6 +3906,7 @@ static const struct object_ops socket_device_ops =
     &device_type,               /* type */
     socket_device_dump,         /* dump */
     no_get_fd,                  /* get_fd */
+    no_get_sync,                /* get_sync */
     default_map_access,         /* map_access */
     default_get_sd,             /* get_sd */
     default_set_sd,             /* set_sd */
diff --git a/server/symlink.c b/server/symlink.c
index 125130fc90c..391facc355f 100644
--- a/server/symlink.c
+++ b/server/symlink.c
@@ -69,6 +69,7 @@ static const struct object_ops symlink_ops =
     &symlink_type,                /* type */
     symlink_dump,                 /* dump */
     no_get_fd,                    /* get_fd */
+    no_get_sync,                  /* get_sync */
     default_map_access,           /* map_access */
     default_get_sd,               /* get_sd */
     default_set_sd,               /* set_sd */
diff --git a/server/thread.c b/server/thread.c
index ea4432ec6a6..5100045b7f2 100644
--- a/server/thread.c
+++ b/server/thread.c
@@ -94,6 +94,7 @@ struct thread_apc
 };
 
 static void dump_thread_apc( struct object *obj, int verbose );
+static struct sync *thread_apc_get_sync( struct object *obj );
 static int thread_apc_signaled( struct object *obj, struct wait_queue_entry *entry );
 static void thread_apc_destroy( struct object *obj );
 static void clear_apc_queue( struct list *queue );
@@ -113,6 +114,7 @@ static const struct object_ops thread_apc_ops =
     &no_type,                   /* type */
     dump_thread_apc,            /* dump */
     no_get_fd,                  /* get_fd */
+    thread_apc_get_sync,        /* get_sync */
     default_map_access,         /* map_access */
     default_get_sd,             /* get_sd */
     default_set_sd,             /* set_sd */
@@ -142,6 +144,7 @@ struct context
 static const unsigned int system_flags = SERVER_CTX_DEBUG_REGISTERS;
 
 static void dump_context( struct object *obj, int verbose );
+static struct sync *context_get_sync( struct object *obj );
 static int context_signaled( struct object *obj, struct wait_queue_entry *entry );
 
 static const struct sync_ops context_sync_ops =
@@ -159,6 +162,7 @@ static const struct object_ops context_ops =
     &no_type,                   /* type */
     dump_context,               /* dump */
     no_get_fd,                  /* get_fd */
+    context_get_sync,           /* get_sync */
     default_map_access,         /* map_access */
     default_get_sd,             /* get_sd */
     default_set_sd,             /* set_sd */
@@ -191,6 +195,7 @@ struct type_descr thread_type =
 };
 
 static void dump_thread( struct object *obj, int verbose );
+static struct sync *thread_get_sync( struct object *obj );
 static int thread_signaled( struct object *obj, struct wait_queue_entry *entry );
 static unsigned int thread_map_access( struct object *obj, unsigned int access );
 static void thread_poll_event( struct fd *fd, int event );
@@ -212,6 +217,7 @@ static const struct object_ops thread_ops =
     &thread_type,               /* type */
     dump_thread,                /* dump */
     no_get_fd,                  /* get_fd */
+    thread_get_sync,            /* get_sync */
     thread_map_access,          /* map_access */
     default_get_sd,             /* get_sd */
     default_set_sd,             /* set_sd */
@@ -459,6 +465,13 @@ static void dump_context( struct object *obj, int verbose )
              context->regs[CTX_NATIVE].flags, context->regs[CTX_WOW].flags );
 }
 
+static struct sync *context_get_sync( struct object *obj )
+{
+    struct context *context = (struct context *)obj;
+    assert( obj->ops == &context_ops );
+    return &context->obj.sync;
+}
+
 
 static int context_signaled( struct object *obj, struct wait_queue_entry *entry )
 {
@@ -647,6 +660,13 @@ static void dump_thread( struct object *obj, int verbose )
              thread->id, thread->unix_pid, thread->unix_tid, thread->state );
 }
 
+static struct sync *thread_get_sync( struct object *obj )
+{
+    struct thread *thread = (struct thread *)obj;
+    assert( obj->ops == &thread_ops );
+    return &thread->obj.sync;
+}
+
 static int thread_signaled( struct object *obj, struct wait_queue_entry *entry )
 {
     struct thread *mythread = (struct thread *)obj;
@@ -669,6 +689,13 @@ static void dump_thread_apc( struct object *obj, int verbose )
     fprintf( stderr, "APC owner=%p type=%u\n", apc->owner, apc->call.type );
 }
 
+static struct sync *thread_apc_get_sync( struct object *obj )
+{
+    struct thread_apc *apc = (struct thread_apc *)obj;
+    assert( obj->ops == &thread_apc_ops );
+    return &apc->obj.sync;
+}
+
 static int thread_apc_signaled( struct object *obj, struct wait_queue_entry *entry )
 {
     struct thread_apc *apc = (struct thread_apc *)obj;
@@ -975,6 +1002,36 @@ void set_wait_status( struct wait_queue_entry *entry, int status )
     entry->wait->status = status;
 }
 
+static void sync_satisfied( struct sync *sync, struct wait_queue_entry *entry )
+{
+    struct object *obj = CONTAINING_RECORD( sync, struct object, sync );
+    sync->ops->satisfied( obj, entry );
+}
+
+static void sync_remove_queue( struct sync *sync, struct wait_queue_entry *entry )
+{
+    struct object *obj = CONTAINING_RECORD( sync, struct object, sync );
+    sync->ops->remove_queue( obj, entry );
+}
+
+static int sync_add_queue( struct sync *sync, struct wait_queue_entry *entry )
+{
+    struct object *obj = CONTAINING_RECORD( sync, struct object, sync );
+    return sync->ops->add_queue( obj, entry );
+}
+
+static int sync_signaled( struct sync *sync, struct wait_queue_entry *entry )
+{
+    struct object *obj = CONTAINING_RECORD( sync, struct object, sync );
+    return sync->ops->signaled( obj, entry );
+}
+
+static int sync_signal( struct sync *sync, unsigned int access )
+{
+    struct object *obj = CONTAINING_RECORD( sync, struct object, sync );
+    return sync->ops->signal( obj, access );
+}
+
 /* finish waiting */
 static unsigned int end_wait( struct thread *thread, unsigned int status )
 {
@@ -991,18 +1048,26 @@ static unsigned int end_wait( struct thread *thread, unsigned int status )
         if (wait->select == SELECT_WAIT_ALL)
         {
             for (i = 0, entry = wait->queues; i < wait->count; i++, entry++)
-                entry->obj->sync.ops->satisfied( entry->obj, entry );
+            {
+                struct sync *sync = entry->obj->ops->get_sync( entry->obj );
+                sync_satisfied( sync, entry );
+            }
         }
         else
         {
+            struct sync *sync;
             entry = wait->queues + status;
-            entry->obj->sync.ops->satisfied( entry->obj, entry );
+            sync = entry->obj->ops->get_sync( entry->obj );
+            sync_satisfied( sync, entry );
         }
         status = wait->status;
         if (wait->abandoned) status += STATUS_ABANDONED_WAIT_0;
     }
     for (i = 0, entry = wait->queues; i < wait->count; i++, entry++)
-        entry->obj->sync.ops->remove_queue( entry->obj, entry );
+    {
+        struct sync *sync = entry->obj->ops->get_sync( entry->obj );
+        sync_remove_queue( sync, entry );
+    }
     if (wait->user) remove_timeout_user( wait->user );
     free( wait );
     return status;
@@ -1031,8 +1096,9 @@ static int wait_on( const union select_op *select_op, unsigned int count, struct
     for (i = 0, entry = wait->queues; i < count; i++, entry++)
     {
         struct object *obj = objects[i];
+        struct sync *sync = obj->ops->get_sync( obj );
         entry->wait = wait;
-        if (!obj->sync.ops->add_queue( obj, entry ))
+        if (!sync_add_queue( sync, entry ))
         {
             wait->count = i;
             end_wait( current, get_error() );
@@ -1086,13 +1152,19 @@ static int check_wait( struct thread *thread )
         /* Note: we must check them all anyway, as some objects may
          * want to do something when signaled, even if others are not */
         for (i = 0, entry = wait->queues; i < wait->count; i++, entry++)
-            not_ok |= !entry->obj->sync.ops->signaled( entry->obj, entry );
+        {
+            struct sync *sync = entry->obj->ops->get_sync( entry->obj );
+            not_ok |= !sync_signaled( sync, entry );
+        }
         if (!not_ok) return STATUS_WAIT_0;
     }
     else
     {
         for (i = 0, entry = wait->queues; i < wait->count; i++, entry++)
-            if (entry->obj->sync.ops->signaled( entry->obj, entry )) return i;
+        {
+            struct sync *sync = entry->obj->ops->get_sync( entry->obj );
+            if (sync_signaled( sync, entry )) return i;
+        }
     }
 
     if ((wait->flags & SELECT_ALERTABLE) && !list_empty(&thread->user_apc)) return STATUS_USER_APC;
@@ -1208,7 +1280,8 @@ static int signal_object( obj_handle_t handle )
     obj = get_handle_obj( current->process, handle, 0, NULL );
     if (obj)
     {
-        ret = obj->sync.ops->signal( obj, get_handle_access( current->process, handle ));
+        struct sync *sync = obj->ops->get_sync( obj );
+        ret = sync_signal( sync, get_handle_access( current->process, handle ) );
         release_object( obj );
     }
     return ret;
diff --git a/server/timer.c b/server/timer.c
index c82845cf80f..50cb7a618e5 100644
--- a/server/timer.c
+++ b/server/timer.c
@@ -64,6 +64,7 @@ struct timer
 };
 
 static void timer_dump( struct object *obj, int verbose );
+static struct sync *timer_get_sync( struct object *obj );
 static int timer_signaled( struct object *obj, struct wait_queue_entry *entry );
 static void timer_satisfied( struct object *obj, struct wait_queue_entry *entry );
 static void timer_destroy( struct object *obj );
@@ -83,6 +84,7 @@ static const struct object_ops timer_ops =
     &timer_type,               /* type */
     timer_dump,                /* dump */
     no_get_fd,                 /* get_fd */
+    timer_get_sync,            /* get_sync */
     default_map_access,        /* map_access */
     default_get_sd,            /* get_sd */
     default_set_sd,            /* set_sd */
@@ -206,6 +208,13 @@ static void timer_dump( struct object *obj, int verbose )
              timer->manual, get_timeout_str(timeout), timer->period );
 }
 
+static struct sync *timer_get_sync( struct object *obj )
+{
+    struct timer *timer = (struct timer *)obj;
+    assert( obj->ops == &timer_ops );
+    return &timer->obj.sync;
+}
+
 static int timer_signaled( struct object *obj, struct wait_queue_entry *entry )
 {
     struct timer *timer = (struct timer *)obj;
diff --git a/server/token.c b/server/token.c
index e7a975ae793..4f90a673f8e 100644
--- a/server/token.c
+++ b/server/token.c
@@ -143,6 +143,7 @@ static const struct object_ops token_ops =
     &token_type,               /* type */
     token_dump,                /* dump */
     no_get_fd,                 /* get_fd */
+    no_get_sync,               /* get_sync */
     default_map_access,        /* map_access */
     default_get_sd,            /* get_sd */
     token_set_sd,              /* set_sd */
diff --git a/server/window.c b/server/window.c
index da215ab5b78..1d8bf258d02 100644
--- a/server/window.c
+++ b/server/window.c
@@ -105,6 +105,7 @@ static const struct object_ops window_ops =
     &no_type,                 /* type */
     window_dump,              /* dump */
     no_get_fd,                /* get_fd */
+    no_get_sync,              /* get_sync */
     default_map_access,       /* map_access */
     default_get_sd,           /* get_sd */
     default_set_sd,           /* set_sd */
diff --git a/server/winstation.c b/server/winstation.c
index 5b33abb257f..019c2fc810c 100644
--- a/server/winstation.c
+++ b/server/winstation.c
@@ -74,6 +74,7 @@ static const struct object_ops winstation_ops =
     &winstation_type,             /* type */
     winstation_dump,              /* dump */
     no_get_fd,                    /* get_fd */
+    no_get_sync,                  /* get_sync */
     default_map_access,           /* map_access */
     default_get_sd,               /* get_sd */
     default_set_sd,               /* set_sd */
@@ -109,6 +110,7 @@ static const struct object_ops desktop_ops =
     &desktop_type,                /* type */
     desktop_dump,                 /* dump */
     no_get_fd,                    /* get_fd */
+    no_get_sync,                  /* get_sync */
     default_map_access,           /* map_access */
     default_get_sd,               /* get_sd */
     default_set_sd,               /* set_sd */
-- 
GitLab


https://gitlab.winehq.org/wine/wine/-/merge_requests/7848

[PATCH 3/8] server: Use an event as fd sync.

[Rémi Bernon]

From: Rémi Bernon <rbernon(a)codeweavers.com>

---
 server/event.c  | 11 +++++++++++
 server/fd.c     | 34 ++++++++--------------------------
 server/object.h |  2 ++
 3 files changed, 21 insertions(+), 26 deletions(-)

diff --git a/server/event.c b/server/event.c
index eeba7fcaf58..d500129217b 100644
--- a/server/event.c
+++ b/server/event.c
@@ -168,6 +168,12 @@ struct event *create_event( struct object *root, const struct unicode_str *name,
     return event;
 }
 
+/* create a wineserver internal event for sync purposes */
+struct event *create_event_sync( int manual, int signaled )
+{
+    return create_event( NULL, NULL, 0, manual, signaled, NULL );
+}
+
 struct event *get_event_obj( struct process *process, obj_handle_t handle, unsigned int access )
 {
     return (struct event *)get_handle_obj( process, handle, access, &event_ops );
@@ -193,6 +199,11 @@ void reset_event( struct event *event )
     event->signaled = 0;
 }
 
+struct sync *get_event_sync( struct event *event )
+{
+    return &event->obj.sync;
+}
+
 static void event_dump( struct object *obj, int verbose )
 {
     struct event *event = (struct event *)obj;
diff --git a/server/fd.c b/server/fd.c
index 7859d9adbcd..9005c2803d2 100644
--- a/server/fd.c
+++ b/server/fd.c
@@ -128,6 +128,7 @@ struct closed_fd
 struct fd
 {
     struct object        obj;         /* object header */
+    struct event        *sync;        /* event object as sync */
     const struct fd_ops *fd_ops;      /* file descriptor operations */
     struct inode        *inode;       /* inode that this fd belongs to */
     struct list          inode_entry; /* entry in inode fd list */
@@ -145,7 +146,6 @@ struct fd
     int                  unix_fd;     /* unix file descriptor */
     unsigned int         no_fd_status;/* status to return when unix_fd is -1 */
     unsigned int         cacheable :1;/* can the fd be cached on the client side? */
-    unsigned int         signaled :1; /* is the fd signaled? */
     unsigned int         fs_locks :1; /* can we use filesystem locks for this fd? */
     int                  poll_index;  /* index of fd in poll array */
     struct async_queue   read_q;      /* async readers of this fd */
@@ -158,18 +158,8 @@ struct fd
 
 static void fd_dump( struct object *obj, int verbose );
 static struct sync *fd_get_sync( struct object *obj );
-static int fd_signaled( struct object *obj, struct wait_queue_entry *entry );
 static void fd_destroy( struct object *obj );
 
-const struct sync_ops fd_sync_ops =
-{
-    add_queue,                    /* add_queue */
-    remove_queue,                 /* remove_queue */
-    fd_signaled,                  /* signaled */
-    no_satisfied,                 /* satisfied */
-    no_signal,                    /* signal */
-};
-
 static const struct object_ops fd_ops =
 {
     sizeof(struct fd),        /* size */
@@ -1576,7 +1566,7 @@ static void fd_dump( struct object *obj, int verbose )
 static struct sync *fd_get_sync( struct object *obj )
 {
     struct fd *fd = (struct fd *)obj;
-    return &fd->obj.sync;
+    return get_event_sync( fd->sync );
 }
 
 static void fd_destroy( struct object *obj )
@@ -1603,6 +1593,7 @@ static void fd_destroy( struct object *obj )
         if (fd->unix_fd != -1) close( fd->unix_fd );
         free( fd->unix_name );
     }
+    release_object( fd->sync );
 }
 
 /* check if the desired access is possible without violating */
@@ -1701,7 +1692,7 @@ static struct fd *alloc_fd_object(void)
     struct fd *fd;
 
     if (!(fd = alloc_object( &fd_ops ))) return NULL;
-    fd->obj.sync.ops = &fd_sync_ops;
+    fd->sync       = create_event_sync( 1, 1 );
     fd->fd_ops     = NULL;
     fd->user       = NULL;
     fd->inode      = NULL;
@@ -1716,7 +1707,6 @@ static struct fd *alloc_fd_object(void)
     fd->nt_name    = NULL;
     fd->nt_namelen = 0;
     fd->cacheable  = 0;
-    fd->signaled   = 1;
     fd->fs_locks   = 1;
     fd->poll_index = -1;
     fd->completion = NULL;
@@ -1741,7 +1731,7 @@ struct fd *alloc_pseudo_fd( const struct fd_ops *fd_user_ops, struct object *use
     struct fd *fd;
 
     if (!(fd = alloc_object( &fd_ops ))) return NULL;
-    fd->obj.sync.ops = &fd_sync_ops;
+    fd->sync       = create_event_sync( 1, 1 );
     fd->fd_ops     = fd_user_ops;
     fd->user       = user;
     fd->inode      = NULL;
@@ -1756,7 +1746,6 @@ struct fd *alloc_pseudo_fd( const struct fd_ops *fd_user_ops, struct object *use
     fd->nt_namelen = 0;
     fd->unix_fd    = -1;
     fd->cacheable  = 0;
-    fd->signaled   = 1;
     fd->fs_locks   = 0;
     fd->poll_index = -1;
     fd->completion = NULL;
@@ -2170,8 +2159,8 @@ int is_fd_removable( struct fd *fd )
 void set_fd_signaled( struct fd *fd, int signaled )
 {
     if (fd->comp_flags & FILE_SKIP_SET_EVENT_ON_HANDLE) return;
-    fd->signaled = signaled;
-    if (signaled) wake_up( &fd->obj, 0 );
+    if (signaled) set_event( fd->sync );
+    else reset_event( fd->sync );
 }
 
 /* check if events are pending and if yes return which one(s) */
@@ -2188,18 +2177,11 @@ int check_fd_events( struct fd *fd, int events )
     return pfd.revents;
 }
 
-static int fd_signaled( struct object *obj, struct wait_queue_entry *entry )
-{
-    struct fd *fd = (struct fd *)obj;
-    assert( obj->ops == &fd_ops );
-    return fd->signaled;
-}
-
 /* default get_sync() routine for objects that poll() on an fd */
 struct sync *default_fd_get_sync( struct object *obj )
 {
     struct fd *fd = get_obj_fd( obj );
-    struct sync *sync = &fd->obj.sync;
+    struct sync *sync = get_event_sync( fd->sync );
     release_object( fd );
     return sync;
 }
diff --git a/server/object.h b/server/object.h
index 3db4f3d56cb..26f50423197 100644
--- a/server/object.h
+++ b/server/object.h
@@ -231,12 +231,14 @@ struct keyed_event;
 extern struct event *create_event( struct object *root, const struct unicode_str *name,
                                    unsigned int attr, int manual_reset, int initial_state,
                                    const struct security_descriptor *sd );
+extern struct event *create_event_sync( int manual, int signaled );
 extern struct keyed_event *create_keyed_event( struct object *root, const struct unicode_str *name,
                                                unsigned int attr, const struct security_descriptor *sd );
 extern struct event *get_event_obj( struct process *process, obj_handle_t handle, unsigned int access );
 extern struct keyed_event *get_keyed_event_obj( struct process *process, obj_handle_t handle, unsigned int access );
 extern void set_event( struct event *event );
 extern void reset_event( struct event *event );
+extern struct sync *get_event_sync( struct event *event );
 
 /* mutex functions */
 
-- 
GitLab


https://gitlab.winehq.org/wine/wine/-/merge_requests/7848

[PATCH 4/8] server: Use an event as thread apc sync.

[Rémi Bernon]

From: Rémi Bernon <rbernon(a)codeweavers.com>

---
 server/thread.c | 30 ++++++++----------------------
 1 file changed, 8 insertions(+), 22 deletions(-)

diff --git a/server/thread.c b/server/thread.c
index 5100045b7f2..6f99b8c0415 100644
--- a/server/thread.c
+++ b/server/thread.c
@@ -85,6 +85,7 @@ struct thread_wait
 struct thread_apc
 {
     struct object       obj;      /* object header */
+    struct event       *sync;     /* event object as sync */
     struct list         entry;    /* queue linked list */
     struct thread      *caller;   /* thread that queued this apc */
     struct object      *owner;    /* object that queued this apc */
@@ -95,19 +96,9 @@ struct thread_apc
 
 static void dump_thread_apc( struct object *obj, int verbose );
 static struct sync *thread_apc_get_sync( struct object *obj );
-static int thread_apc_signaled( struct object *obj, struct wait_queue_entry *entry );
 static void thread_apc_destroy( struct object *obj );
 static void clear_apc_queue( struct list *queue );
 
-static const struct sync_ops thread_apc_sync_ops =
-{
-    add_queue,                  /* add_queue */
-    remove_queue,               /* remove_queue */
-    thread_apc_signaled,        /* signaled */
-    no_satisfied,               /* satisfied */
-    no_signal,                  /* signal */
-};
-
 static const struct object_ops thread_apc_ops =
 {
     sizeof(struct thread_apc),  /* size */
@@ -693,13 +684,7 @@ static struct sync *thread_apc_get_sync( struct object *obj )
 {
     struct thread_apc *apc = (struct thread_apc *)obj;
     assert( obj->ops == &thread_apc_ops );
-    return &apc->obj.sync;
-}
-
-static int thread_apc_signaled( struct object *obj, struct wait_queue_entry *entry )
-{
-    struct thread_apc *apc = (struct thread_apc *)obj;
-    return apc->executed;
+    return get_event_sync( apc->sync );
 }
 
 static void thread_apc_destroy( struct object *obj )
@@ -715,6 +700,7 @@ static void thread_apc_destroy( struct object *obj )
             async_set_result( apc->owner, apc->call.async_io.status, 0 );
         release_object( apc->owner );
     }
+    release_object( apc->sync );
 }
 
 /* queue an async procedure call */
@@ -724,7 +710,7 @@ static struct thread_apc *create_apc( struct object *owner, const union apc_call
 
     if ((apc = alloc_object( &thread_apc_ops )))
     {
-        apc->obj.sync.ops = &thread_apc_sync_ops;
+        apc->sync = create_event_sync( 1, 0 );
         if (call_data) apc->call = *call_data;
         else apc->call.type = APC_NONE;
         apc->caller      = NULL;
@@ -1486,7 +1472,7 @@ void thread_cancel_apc( struct thread *thread, struct object *owner, enum apc_ty
         if (apc->owner != owner) continue;
         list_remove( &apc->entry );
         apc->executed = 1;
-        wake_up( &apc->obj, 0 );
+        set_event( apc->sync );
         release_object( apc );
         return;
     }
@@ -1516,7 +1502,7 @@ static void clear_apc_queue( struct list *queue )
         struct thread_apc *apc = LIST_ENTRY( ptr, struct thread_apc, entry );
         list_remove( &apc->entry );
         apc->executed = 1;
-        wake_up( &apc->obj, 0 );
+        set_event( apc->sync );
         release_object( apc );
     }
 }
@@ -1976,7 +1962,7 @@ DECL_HANDLER(select)
             apc->result.create_thread.handle = handle;
             clear_error();  /* ignore errors from the above calls */
         }
-        wake_up( &apc->obj, 0 );
+        set_event( apc->sync );
         close_handle( current->process, req->prev_apc );
         release_object( apc );
     }
@@ -1999,7 +1985,7 @@ DECL_HANDLER(select)
         else
         {
             apc->executed = 1;
-            wake_up( &apc->obj, 0 );
+            set_event( apc->sync );
         }
         release_object( apc );
     }
-- 
GitLab


https://gitlab.winehq.org/wine/wine/-/merge_requests/7848

[PATCH 5/8] server: Use an event as thread context sync.

[Rémi Bernon]

From: Rémi Bernon <rbernon(a)codeweavers.com>

---
 server/thread.c | 29 ++++++++++-------------------
 1 file changed, 10 insertions(+), 19 deletions(-)

diff --git a/server/thread.c b/server/thread.c
index 6f99b8c0415..a418100d9e0 100644
--- a/server/thread.c
+++ b/server/thread.c
@@ -125,6 +125,7 @@ static const struct object_ops thread_apc_ops =
 struct context
 {
     struct object   obj;        /* object header */
+    struct event   *sync;       /* event object as sync */
     unsigned int    status;     /* status of the context */
     struct context_data regs[2];/* context data */
 };
@@ -136,16 +137,7 @@ static const unsigned int system_flags = SERVER_CTX_DEBUG_REGISTERS;
 
 static void dump_context( struct object *obj, int verbose );
 static struct sync *context_get_sync( struct object *obj );
-static int context_signaled( struct object *obj, struct wait_queue_entry *entry );
-
-static const struct sync_ops context_sync_ops =
-{
-    add_queue,                  /* add_queue */
-    remove_queue,               /* remove_queue */
-    context_signaled,           /* signaled */
-    no_satisfied,               /* satisfied */
-    no_signal,                  /* signal */
-};
+static void context_destroy( struct object *obj );
 
 static const struct object_ops context_ops =
 {
@@ -164,7 +156,7 @@ static const struct object_ops context_ops =
     no_open_file,               /* open_file */
     no_kernel_obj_list,         /* get_kernel_obj_list */
     no_close_handle,            /* close_handle */
-    no_destroy                  /* destroy */
+    context_destroy             /* destroy */
 };
 
 
@@ -460,22 +452,21 @@ static struct sync *context_get_sync( struct object *obj )
 {
     struct context *context = (struct context *)obj;
     assert( obj->ops == &context_ops );
-    return &context->obj.sync;
+    return get_event_sync( context->sync );
 }
 
-
-static int context_signaled( struct object *obj, struct wait_queue_entry *entry )
+static void context_destroy( struct object *obj )
 {
     struct context *context = (struct context *)obj;
-    return context->status != STATUS_PENDING;
+    assert( obj->ops == &context_ops );
+    release_object( context->sync );
 }
 
-
 static struct context *create_thread_context( struct thread *thread )
 {
     struct context *context;
     if (!(context = alloc_object( &context_ops ))) return NULL;
-    context->obj.sync.ops = &context_sync_ops;
+    context->sync = create_event_sync( 1, 0 );
     context->status = STATUS_PENDING;
     memset( &context->regs, 0, sizeof(context->regs) );
     context->regs[CTX_NATIVE].machine = native_machine;
@@ -594,7 +585,7 @@ static void cleanup_thread( struct thread *thread )
     if (thread->context)
     {
         thread->context->status = STATUS_ACCESS_DENIED;
-        wake_up( &thread->context->obj, 0 );
+        set_event( thread->context->sync );
         release_object( thread->context );
         thread->context = NULL;
     }
@@ -1938,7 +1929,7 @@ DECL_HANDLER(select)
         }
         ctx->status = STATUS_SUCCESS;
         current->suspend_cookie = req->cookie;
-        wake_up( &ctx->obj, 0 );
+        set_event( ctx->sync );
     }
 
     if (!req->cookie) goto invalid_param;
-- 
GitLab


https://gitlab.winehq.org/wine/wine/-/merge_requests/7848

[PATCH 6/8] server: Use an event as process startup info sync.

[Rémi Bernon]

From: Rémi Bernon <rbernon(a)codeweavers.com>

---
 server/process.c | 24 +++++-------------------
 1 file changed, 5 insertions(+), 19 deletions(-)

diff --git a/server/process.c b/server/process.c
index eac2df227c9..85e50d8b63b 100644
--- a/server/process.c
+++ b/server/process.c
@@ -144,6 +144,7 @@ static const struct fd_ops process_fd_ops =
 struct startup_info
 {
     struct object       obj;          /* object header */
+    struct event       *sync;         /* event object as sync */
     struct process     *process;      /* created process */
     data_size_t         info_size;    /* size of startup info */
     data_size_t         data_size;    /* size of whole startup data */
@@ -152,18 +153,8 @@ struct startup_info
 
 static void startup_info_dump( struct object *obj, int verbose );
 static struct sync *startup_info_get_sync( struct object *obj );
-static int startup_info_signaled( struct object *obj, struct wait_queue_entry *entry );
 static void startup_info_destroy( struct object *obj );
 
-static const struct sync_ops startup_info_sync_ops =
-{
-    add_queue,                     /* add_queue */
-    remove_queue,                  /* remove_queue */
-    startup_info_signaled,         /* signaled */
-    no_satisfied,                  /* satisfied */
-    no_signal,                     /* signal */
-};
-
 static const struct object_ops startup_info_ops =
 {
     sizeof(struct startup_info),   /* size */
@@ -577,7 +568,7 @@ static void set_process_startup_state( struct process *process, enum startup_sta
     if (process->startup_state == STARTUP_IN_PROGRESS) process->startup_state = state;
     if (process->startup_info)
     {
-        wake_up( &process->startup_info->obj, 0 );
+        set_event( process->startup_info->sync );
         release_object( process->startup_info );
         process->startup_info = NULL;
     }
@@ -905,6 +896,7 @@ static void startup_info_destroy( struct object *obj )
     assert( obj->ops == &startup_info_ops );
     free( info->data );
     if (info->process) release_object( info->process );
+    release_object( info->sync );
 }
 
 static void startup_info_dump( struct object *obj, int verbose )
@@ -923,13 +915,7 @@ static struct sync *startup_info_get_sync( struct object *obj )
 {
     struct startup_info *info = (struct startup_info *)obj;
     assert( obj->ops == &startup_info_ops );
-    return &info->obj.sync;
-}
-
-static int startup_info_signaled( struct object *obj, struct wait_queue_entry *entry )
-{
-    struct startup_info *info = (struct startup_info *)obj;
-    return info->process && info->process->startup_state != STARTUP_IN_PROGRESS;
+    return get_event_sync( info->sync );
 }
 
 /* get a process from an id (and increment the refcount) */
@@ -1240,7 +1226,7 @@ DECL_HANDLER(new_process)
         release_object( parent );
         return;
     }
-    info->obj.sync.ops = &startup_info_sync_ops;
+    info->sync     = create_event_sync( 1, 0 );
     info->process  = NULL;
     info->data     = NULL;
 
-- 
GitLab


https://gitlab.winehq.org/wine/wine/-/merge_requests/7848

[PATCH 7/8] server: Use an event as file lock sync.

[Rémi Bernon]

From: Rémi Bernon <rbernon(a)codeweavers.com>

---
 server/fd.c | 26 +++++++++-----------------
 1 file changed, 9 insertions(+), 17 deletions(-)

diff --git a/server/fd.c b/server/fd.c
index 9005c2803d2..9bcfce560d8 100644
--- a/server/fd.c
+++ b/server/fd.c
@@ -258,6 +258,7 @@ static const struct object_ops inode_ops =
 struct file_lock
 {
     struct object       obj;         /* object header */
+    struct event       *sync;        /* event object as sync */
     struct fd          *fd;          /* fd owning this lock */
     struct list         fd_entry;    /* entry in list of locks on a given fd */
     struct list         inode_entry; /* entry in inode list of locks */
@@ -270,16 +271,7 @@ struct file_lock
 
 static void file_lock_dump( struct object *obj, int verbose );
 static struct sync *file_lock_get_sync( struct object *obj );
-static int file_lock_signaled( struct object *obj, struct wait_queue_entry *entry );
-
-static const struct sync_ops file_lock_sync_ops =
-{
-    add_queue,                  /* add_queue */
-    remove_queue,               /* remove_queue */
-    file_lock_signaled,         /* signaled */
-    no_satisfied,               /* satisfied */
-    no_signal,                  /* signal */
-};
+static void file_lock_destroy( struct object *obj );
 
 static const struct object_ops file_lock_ops =
 {
@@ -298,7 +290,7 @@ static const struct object_ops file_lock_ops =
     no_open_file,               /* open_file */
     no_kernel_obj_list,         /* get_kernel_obj_list */
     no_close_handle,            /* close_handle */
-    no_destroy                  /* destroy */
+    file_lock_destroy           /* destroy */
 };
 
 
@@ -1235,14 +1227,14 @@ static struct sync *file_lock_get_sync( struct object *obj )
 {
     struct file_lock *lock = (struct file_lock *)obj;
     assert( obj->ops == &file_lock_ops );
-    return &lock->obj.sync;
+    return get_event_sync( lock->sync );
 }
 
-static int file_lock_signaled( struct object *obj, struct wait_queue_entry *entry )
+static void file_lock_destroy( struct object *obj )
 {
     struct file_lock *lock = (struct file_lock *)obj;
-    /* lock is signaled if it has lost its owner */
-    return !lock->process;
+    assert( obj->ops == &file_lock_ops );
+    release_object( lock->sync );
 }
 
 /* set (or remove) a Unix lock if possible for the given range */
@@ -1424,7 +1416,7 @@ static struct file_lock *add_lock( struct fd *fd, int shared, file_pos_t start,
     struct file_lock *lock;
 
     if (!(lock = alloc_object( &file_lock_ops ))) return NULL;
-    lock->obj.sync.ops = &file_lock_sync_ops;
+    lock->sync    = create_event_sync( 1, 0 );
     lock->shared  = shared;
     lock->start   = start;
     lock->end     = end;
@@ -1454,7 +1446,7 @@ static void remove_lock( struct file_lock *lock, int remove_unix )
     if (remove_unix) remove_unix_locks( lock->fd, lock->start, lock->end );
     if (list_empty( &inode->locks )) inode_close_pending( inode, 1 );
     lock->process = NULL;
-    wake_up( &lock->obj, 0 );
+    set_event( lock->sync );
     release_object( lock );
 }
 
-- 
GitLab


https://gitlab.winehq.org/wine/wine/-/merge_requests/7848

[PATCH 8/8] server: Use an event as debug event sync.

[Rémi Bernon]

From: Rémi Bernon <rbernon(a)codeweavers.com>

---
 server/debugger.c | 30 +++++++++---------------------
 1 file changed, 9 insertions(+), 21 deletions(-)

diff --git a/server/debugger.c b/server/debugger.c
index 8024556d77d..460483a1591 100644
--- a/server/debugger.c
+++ b/server/debugger.c
@@ -43,6 +43,7 @@ enum debug_event_state { EVENT_QUEUED, EVENT_SENT, EVENT_DELAYED, EVENT_CONTINUE
 struct debug_event
 {
     struct object          obj;       /* object header */
+    struct event          *sync;      /* event object as sync */
     struct list            entry;     /* entry in event queue */
     struct thread         *sender;    /* thread which sent this event */
     struct file           *file;      /* file object for events that need one */
@@ -76,18 +77,8 @@ struct debug_obj
 
 static void debug_event_dump( struct object *obj, int verbose );
 static struct sync *debug_event_get_sync( struct object *obj );
-static int debug_event_signaled( struct object *obj, struct wait_queue_entry *entry );
 static void debug_event_destroy( struct object *obj );
 
-static const struct sync_ops debug_event_sync_ops =
-{
-    add_queue,                     /* add_queue */
-    remove_queue,                  /* remove_queue */
-    debug_event_signaled,          /* signaled */
-    no_satisfied,                  /* satisfied */
-    no_signal,                     /* signal */
-};
-
 static const struct object_ops debug_event_ops =
 {
     sizeof(struct debug_event),    /* size */
@@ -273,6 +264,7 @@ static void link_event( struct debug_obj *debug_obj, struct debug_event *event )
 static void resume_event( struct debug_obj *debug_obj, struct debug_event *event )
 {
     event->state = EVENT_QUEUED;
+    reset_event( event->sync );
     if (!event->sender->process->debug_event)
     {
         grab_object( debug_obj );
@@ -285,6 +277,7 @@ static void resume_event( struct debug_obj *debug_obj, struct debug_event *event
 static void delay_event( struct debug_obj *debug_obj, struct debug_event *event )
 {
     event->state = EVENT_DELAYED;
+    reset_event( event->sync );
     if (event->sender->process->debug_event == event) event->sender->process->debug_event = NULL;
 }
 
@@ -315,14 +308,7 @@ static struct sync *debug_event_get_sync( struct object *obj )
 {
     struct debug_event *debug_event = (struct debug_event *)obj;
     assert( obj->ops == &debug_event_ops );
-    return &debug_event->obj.sync;
-}
-
-static int debug_event_signaled( struct object *obj, struct wait_queue_entry *entry )
-{
-    struct debug_event *debug_event = (struct debug_event *)obj;
-    assert( obj->ops == &debug_event_ops );
-    return debug_event->state == EVENT_CONTINUED;
+    return get_event_sync( debug_event->sync );
 }
 
 static void debug_event_destroy( struct object *obj )
@@ -332,6 +318,7 @@ static void debug_event_destroy( struct object *obj )
 
     if (event->file) release_object( event->file );
     release_object( event->sender );
+    release_object( event->sync );
 }
 
 static void debug_obj_dump( struct object *obj, int verbose )
@@ -433,7 +420,7 @@ static int continue_debug_event( struct debug_obj *debug_obj, struct process *pr
                 assert( event->sender->process->debug_event == event );
                 event->status = status;
                 event->state  = EVENT_CONTINUED;
-                wake_up( &event->obj, 0 );
+                set_event( event->sync );
                 unlink_event( debug_obj, event );
                 resume_process( process );
                 return 1;
@@ -454,7 +441,7 @@ static struct debug_event *alloc_debug_event( struct thread *thread, int code, c
 
     /* build the event */
     if (!(event = alloc_object( &debug_event_ops ))) return NULL;
-    event->obj.sync.ops = &debug_event_sync_ops;
+    event->sync      = create_event_sync( 1, 0 );
     event->state     = EVENT_QUEUED;
     event->sender    = (struct thread *)grab_object( thread );
     event->file      = NULL;
@@ -546,7 +533,7 @@ void debugger_detach( struct process *process, struct debug_obj *debug_obj )
         assert( event->state != EVENT_CONTINUED );
         event->status = DBG_CONTINUE;
         event->state  = EVENT_CONTINUED;
-        wake_up( &event->obj, 0 );
+        set_event( event->sync );
         unlink_event( debug_obj, event );
         /* from queued debug event */
         resume_process( process );
@@ -592,6 +579,7 @@ DECL_HANDLER(wait_debug_event)
     if ((event = find_event_to_send( debug_obj )))
     {
         event->state = EVENT_SENT;
+        reset_event( event->sync );
         event->sender->process->debug_event = event;
         reply->pid = get_process_id( event->sender->process );
         reply->tid = get_thread_id( event->sender );
-- 
GitLab

https://gitlab.winehq.org/wine/wine/-/merge_requests/7848

[Paul Gofman (＠gofman)]

What is meant by inproc syncs here, is it ntsync from MR 7236 or something else?

-- 
https://gitlab.winehq.org/wine/wine/-/merge_requests/7848#note_101375

[Rémi Bernon]

On Fri Apr 18 08:19:13 2025 +0000, Paul Gofman wrote:
> What is meant by inproc syncs here, is it ntsync from MR 7226 or
> something else?
> Yes it is, some objects are still supposed to be signaled from wineserver side, and I think it would be cleaner if they use event objects for it.

Otherwise they each need their own inproc sync fd in addition to their own server signal/wait logic, and it spreads ntsync-specific calls everywhere when inproc sync/server sync logic is usually exclusive.

Using event objects instead reduces the changes needed to introduce ntsync inproc syncs to only a couple of objects (events/mutex/semaphore/queue and a two other object types which have very specific server only sync logic).

-- 
https://gitlab.winehq.org/wine/wine/-/merge_requests/7848#note_101376