Alexandre Julliard : server: Use the standard file descriptor signal mechanism for directory changes.
Module: wine Branch: master Commit: a8675531461c21aa8ae0dd43ff1dc403dbbedea5 URL: http://source.winehq.org/git/wine.git/?a=commit;h=a8675531461c21aa8ae0dd43ff... Author: Alexandre Julliard <julliard(a)winehq.org> Date: Wed Apr 4 19:54:33 2007 +0200 server: Use the standard file descriptor signal mechanism for directory changes. --- dlls/ntdll/directory.c | 9 -------- server/change.c | 50 +++-------------------------------------------- 2 files changed, 4 insertions(+), 55 deletions(-) diff --git a/dlls/ntdll/directory.c b/dlls/ntdll/directory.c index 50aaa27..ef6802b 100644 --- a/dlls/ntdll/directory.c +++ b/dlls/ntdll/directory.c @@ -2178,15 +2178,6 @@ static void WINAPI read_changes_apc( void *user, PIO_STATUS_BLOCK iosb, ULONG st TRACE("%p %p %08x\n", info, iosb, status); - /* - * FIXME: race me! - * - * hEvent/hDir is set before the output buffer and iosb is updated. - * Since the thread that called NtNotifyChangeDirectoryFile is usually - * waiting, we'll be safe since we're called in that thread's context. - * If a different thread is waiting on our hEvent/hDir we're going to be - * in trouble... - */ SERVER_START_REQ( read_change ) { req->handle = info->FileHandle; diff --git a/server/change.c b/server/change.c index 30b7346..33034da 100644 --- a/server/change.c +++ b/server/change.c @@ -147,11 +147,9 @@ struct dir struct object obj; /* object header */ struct fd *fd; /* file descriptor to the directory */ struct list entry; /* entry in global change notifications list */ - struct event *event; unsigned int filter; /* notification filter */ int notified; /* SIGIO counter */ int want_data; /* return change data */ - long signaled; /* the file changed */ int subtree; /* do we want to watch subdirectories? */ struct list change_records; /* data for the change */ struct list in_entry; /* entry in the inode dirs list */ @@ -162,7 +160,6 @@ static struct fd *dir_get_fd( struct object *obj ); static unsigned int dir_map_access( struct object *obj, unsigned int access ); static void dir_dump( struct object *obj, int verbose ); static void dir_destroy( struct object *obj ); -static int dir_signaled( struct object *obj, struct thread *thread ); static const struct object_ops dir_ops = { @@ -170,7 +167,7 @@ static const struct object_ops dir_ops = dir_dump, /* dump */ add_queue, /* add_queue */ remove_queue, /* remove_queue */ - dir_signaled, /* signaled */ + default_fd_signaled, /* signaled */ no_satisfied, /* satisfied */ no_signal, /* signal */ dir_get_fd, /* get_fd */ @@ -254,15 +251,7 @@ static void dir_dump( struct object *obj, int verbose ) { struct dir *dir = (struct dir *)obj; assert( obj->ops == &dir_ops ); - fprintf( stderr, "Dirfile fd=%p event=%p filter=%08x\n", - dir->fd, dir->event, dir->filter ); -} - -static int dir_signaled( struct object *obj, struct thread *thread ) -{ - struct dir *dir = (struct dir *)obj; - assert (obj->ops == &dir_ops); - return (dir->event == NULL) && dir->signaled; + fprintf( stderr, "Dirfile fd=%p filter=%08x\n", dir->fd, dir->filter ); } /* enter here directly from SIGIO signal handler */ @@ -279,11 +268,6 @@ void do_change_notify( int unix_fd ) } } -static void dir_signal_changed( struct dir *dir ) -{ - if (!dir->event) wake_up( &dir->obj, 0 ); -} - /* SIGIO callback, called synchronously with the poll loop */ void sigio_callback(void) { @@ -291,13 +275,8 @@ void sigio_callback(void) LIST_FOR_EACH_ENTRY( dir, &change_list, struct dir, entry ) { - long count = interlocked_xchg( &dir->notified, 0 ); - if (count) - { - dir->signaled += count; - if (dir->signaled == count) /* was it 0? */ - dir_signal_changed( dir ); - } + if (interlocked_xchg( &dir->notified, 0 )) + fd_async_wake_up( dir->fd, ASYNC_TYPE_WAIT, STATUS_NOTIFY_ENUM_DIR ); } } @@ -342,7 +321,6 @@ static void dir_destroy( struct object *obj ) while ((record = get_first_change_record( dir ))) free( record ); - if (dir->event) release_object( dir->event ); release_object( dir->fd ); if (inotify_fd && list_empty( &change_list )) @@ -1038,10 +1016,8 @@ struct object *create_dir_obj( struct fd *fd ) return NULL; list_init( &dir->change_records ); - dir->event = NULL; dir->filter = 0; dir->notified = 0; - dir->signaled = 0; dir->want_data = 0; dir->inode = NULL; grab_object( fd ); @@ -1056,7 +1032,6 @@ struct object *create_dir_obj( struct fd *fd ) /* enable change notifications for a directory */ DECL_HANDLER(read_directory_changes) { - struct event *event = NULL; struct dir *dir; struct async *async; @@ -1070,15 +1045,6 @@ DECL_HANDLER(read_directory_changes) if (!dir) return; - /* possibly send changes through an event flag */ - if (req->async.event && - !(event = get_event_obj( current->process, req->async.event, EVENT_MODIFY_STATE ))) - goto end; - - /* discard the current data, and move onto the next event */ - if (dir->event) release_object( dir->event ); - dir->event = event; - /* requests don't timeout */ if (!(async = fd_queue_async( dir->fd, &req->async, ASYNC_TYPE_WAIT, 0 ))) goto end; @@ -1092,10 +1058,6 @@ DECL_HANDLER(read_directory_changes) dir->want_data = req->want_data; } - /* remove any notifications */ - if (dir->signaled>0) - dir->signaled--; - /* if there's already a change in the queue, send it */ if (!list_empty( &dir->change_records )) fd_async_wake_up( dir->fd, ASYNC_TYPE_WAIT, STATUS_ALERTED ); @@ -1129,9 +1091,5 @@ DECL_HANDLER(read_change) else set_error( STATUS_NO_DATA_DETECTED ); - /* now signal it */ - dir->signaled++; - dir_signal_changed( dir ); - release_object( dir ); }
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Alexandre Julliard