[PATCH v34 0/9] MR3103: server: Create and use a desktop shared mapping for GetCursorPos.
First part of Proton shared memory series. The full branch can be seen at https://gitlab.winehq.org/rbernon/wine/-/commits/mr/shared-memories.
-- v34: win32u: Use the desktop shared data for GetCursorPos. server: Move the last cursor time to the desktop session object. server: Move the cursor position to the desktop session object. win32u: Open desktop shared objects from session mapping. server: Return the desktop object info in get_thread_desktop. server: Allocate shared session object for desktops. win32u: Open the global session shared mapping. include: Add ReadNoFence64 inline helpers. server: Create a global session shared mapping.
From: Rémi Bernon rbernon@codeweavers.com
--- server/directory.c | 7 +++++++ server/file.h | 19 +++++++++++++++++++ server/mapping.c | 43 +++++++++++++++++++++++++++++++++++++++++++ server/object.c | 13 ++++++++++++- server/object.h | 2 ++ server/protocol.def | 16 ++++++++++++++++ tools/make_requests | 1 + 7 files changed, 100 insertions(+), 1 deletion(-)
diff --git a/server/directory.c b/server/directory.c index e521a7b38c9..224bd999219 100644 --- a/server/directory.c +++ b/server/directory.c @@ -439,11 +439,14 @@ void init_directories( struct fd *intl_fd ) /* mappings */ static const WCHAR intlW[] = {'N','l','s','S','e','c','t','i','o','n','L','A','N','G','_','I','N','T','L'}; static const WCHAR user_dataW[] = {'_','_','w','i','n','e','_','u','s','e','r','_','s','h','a','r','e','d','_','d','a','t','a'}; + static const WCHAR sessionW[] = {'_','_','w','i','n','e','_','s','e','s','s','i','o','n'}; static const struct unicode_str intl_str = {intlW, sizeof(intlW)}; static const struct unicode_str user_data_str = {user_dataW, sizeof(user_dataW)}; + static const struct unicode_str session_str = {sessionW, sizeof(sessionW)};
struct directory *dir_driver, *dir_device, *dir_global, *dir_kernel, *dir_nls; struct object *named_pipe_device, *mailslot_device, *null_device; + struct mapping *session_mapping; unsigned int i;
root_directory = create_directory( NULL, NULL, OBJ_PERMANENT, HASH_SIZE, NULL ); @@ -491,6 +494,10 @@ void init_directories( struct fd *intl_fd ) release_object( create_user_data_mapping( &dir_kernel->obj, &user_data_str, OBJ_PERMANENT, NULL )); release_object( intl_fd );
+ session_mapping = create_session_mapping( &dir_kernel->obj, &session_str, OBJ_PERMANENT, NULL ); + set_session_mapping( session_mapping ); + release_object( session_mapping ); + release_object( named_pipe_device ); release_object( mailslot_device ); release_object( null_device ); diff --git a/server/file.h b/server/file.h index 7f2d1637863..a7397ffd093 100644 --- a/server/file.h +++ b/server/file.h @@ -188,6 +188,25 @@ extern struct mapping *create_fd_mapping( struct object *root, const struct unic unsigned int attr, const struct security_descriptor *sd ); extern struct object *create_user_data_mapping( struct object *root, const struct unicode_str *name, unsigned int attr, const struct security_descriptor *sd ); +extern struct mapping *create_session_mapping( struct object *root, const struct unicode_str *name, + unsigned int attr, const struct security_descriptor *sd ); +extern void set_session_mapping( struct mapping *mapping ); + +#define SHARED_WRITE_BEGIN( object_shm, type ) \ + do { \ + const type *__shared = (object_shm); \ + type *shared = (type *)__shared; \ + session_object_t *__obj = CONTAINING_RECORD( shared, session_object_t, shm ); \ + LONG64 __seq = __obj->seq + 1, __end = __seq + 1; \ + assert( (__seq & 1) != 0 ); \ + __WINE_ATOMIC_STORE_RELEASE( &__obj->seq, &__seq ); \ + do + +#define SHARED_WRITE_END \ + while(0); \ + assert( __seq == __obj->seq ); \ + __WINE_ATOMIC_STORE_RELEASE( &__obj->seq, &__end ); \ + } while(0)
/* device functions */
diff --git a/server/mapping.c b/server/mapping.c index ff99b45ce51..79072c8b9c8 100644 --- a/server/mapping.c +++ b/server/mapping.c @@ -225,6 +225,14 @@ static const mem_size_t granularity_mask = 0xffff; static struct addr_range ranges32; static struct addr_range ranges64;
+struct session +{ + const session_object_t *objects; + unsigned int object_capacity; +}; +static struct mapping *session_mapping; +static struct session session; + #define ROUND_SIZE(size) (((size) + page_mask) & ~page_mask)
void init_memory(void) @@ -1256,6 +1264,41 @@ int get_page_size(void) return page_mask + 1; }
+struct mapping *create_session_mapping( struct object *root, const struct unicode_str *name, + unsigned int attr, const struct security_descriptor *sd ) +{ + static const unsigned int access = FILE_READ_DATA | FILE_WRITE_DATA; + mem_size_t size = max( sizeof(*session.objects) * 512, 0x10000 ); + + return create_mapping( root, name, attr, size, SEC_COMMIT, 0, access, sd ); +} + +static void mark_session_object_free( const session_object_t *object ) +{ + SHARED_WRITE_BEGIN( &object->shm, object_shm_t ) + { + /* mark the object data as not accessible */ + mark_block_noaccess( (void *)shared, sizeof(*shared) ); + CONTAINING_RECORD( shared, session_object_t, shm )->id = 0; + } + SHARED_WRITE_END; +} + +void set_session_mapping( struct mapping *mapping ) +{ + unsigned int index; + + session.objects = mmap( NULL, mapping->size, PROT_READ | PROT_WRITE, MAP_SHARED, get_unix_fd( mapping->fd ), 0 ); + if (session.objects == MAP_FAILED) return; + + session_mapping = mapping; + session.object_capacity = mapping->size / sizeof(*session.objects); + assert( session.object_capacity != -1 ); + + for (index = 0; index < session.object_capacity; index++) + mark_session_object_free( &session.objects[index] ); +} + struct object *create_user_data_mapping( struct object *root, const struct unicode_str *name, unsigned int attr, const struct security_descriptor *sd ) { diff --git a/server/object.c b/server/object.c index 89e541ffb6b..9204593cb6c 100644 --- a/server/object.c +++ b/server/object.c @@ -102,8 +102,19 @@ void close_objects(void)
/*****************************************************************/
+/* mark a block of memory as not accessible for debugging purposes */ +void mark_block_noaccess( void *ptr, size_t size ) +{ + memset( ptr, 0xfe, size ); +#if defined(VALGRIND_MAKE_MEM_NOACCESS) + VALGRIND_DISCARD( VALGRIND_MAKE_MEM_NOACCESS( ptr, size ) ); +#elif defined(VALGRIND_MAKE_NOACCESS) + VALGRIND_DISCARD( VALGRIND_MAKE_NOACCESS( ptr, size ) ); +#endif +} + /* mark a block of memory as uninitialized for debugging purposes */ -static inline void mark_block_uninitialized( void *ptr, size_t size ) +void mark_block_uninitialized( void *ptr, size_t size ) { memset( ptr, 0x55, size ); #if defined(VALGRIND_MAKE_MEM_UNDEFINED) diff --git a/server/object.h b/server/object.h index d4d66536b81..2337ee88231 100644 --- a/server/object.h +++ b/server/object.h @@ -139,6 +139,8 @@ struct wait_queue_entry struct thread_wait *wait; };
+extern void mark_block_noaccess( void *ptr, size_t size ); +extern void mark_block_uninitialized( void *ptr, size_t size ); extern void *mem_alloc( size_t size ) __WINE_ALLOC_SIZE(1) __WINE_DEALLOC(free) __WINE_MALLOC; extern void *memdup( const void *data, size_t len ) __WINE_ALLOC_SIZE(2) __WINE_DEALLOC(free); extern void *alloc_object( const struct object_ops *ops ); diff --git a/server/protocol.def b/server/protocol.def index f6d644d6182..81ac7a65c14 100644 --- a/server/protocol.def +++ b/server/protocol.def @@ -45,6 +45,7 @@ typedef unsigned __int64 mem_size_t; typedef unsigned __int64 file_pos_t; typedef unsigned __int64 client_ptr_t; typedef unsigned __int64 affinity_t; +typedef unsigned __int64 object_id_t; typedef client_ptr_t mod_handle_t;
struct request_header @@ -887,6 +888,21 @@ typedef struct lparam_t info; } cursor_pos_t;
+/****************************************************************/ +/* shared session mapping structures */ + +typedef volatile union +{ + char placeholder; +} object_shm_t; + +typedef volatile struct +{ + LONG64 seq; /* sequence number - server updating if (seq & 1) != 0 */ + object_id_t id; /* object unique id, object data is valid if != 0 */ + object_shm_t shm; /* object shared data */ +} session_object_t; + /****************************************************************/ /* Request declarations */
diff --git a/tools/make_requests b/tools/make_requests index 419b1264ea4..b20b53096ca 100755 --- a/tools/make_requests +++ b/tools/make_requests @@ -42,6 +42,7 @@ my %formats = "file_pos_t" => [ 8, 8, "&dump_uint64" ], "mem_size_t" => [ 8, 8, "&dump_uint64" ], "affinity_t" => [ 8, 8, "&dump_uint64" ], + "object_id_t" => [ 8, 8, "&dump_uint64" ], "timeout_t" => [ 8, 8, "&dump_timeout" ], "abstime_t" => [ 8, 8, "&dump_abstime" ], "rectangle_t" => [ 16, 4, "&dump_rectangle" ],
From: Rémi Bernon rbernon@codeweavers.com
--- include/winnt.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)
diff --git a/include/winnt.h b/include/winnt.h index b18d255a79c..42f3dc05a28 100644 --- a/include/winnt.h +++ b/include/winnt.h @@ -7064,11 +7064,14 @@ static FORCEINLINE void MemoryBarrier(void) */ #if _MSC_VER >= 1700 #pragma intrinsic(__iso_volatile_load32) +#pragma intrinsic(__iso_volatile_load64) #pragma intrinsic(__iso_volatile_store32) #define __WINE_LOAD32_NO_FENCE(src) (__iso_volatile_load32(src)) +#define __WINE_LOAD64_NO_FENCE(src) (__iso_volatile_load64(src)) #define __WINE_STORE32_NO_FENCE(dest, value) (__iso_volatile_store32(dest, value)) #else /* _MSC_VER >= 1700 */ #define __WINE_LOAD32_NO_FENCE(src) (*(src)) +#define __WINE_LOAD64_NO_FENCE(src) (*(src)) #define __WINE_STORE32_NO_FENCE(dest, value) ((void)(*(dest) = (value))) #endif /* _MSC_VER >= 1700 */
@@ -7102,6 +7105,12 @@ static FORCEINLINE LONG ReadNoFence( LONG const volatile *src ) return value; }
+static FORCEINLINE LONG64 ReadNoFence64( LONG64 const volatile *src ) +{ + LONG64 value = __WINE_LOAD64_NO_FENCE( (__int64 const volatile *)src ); + return value; +} + static FORCEINLINE void WriteRelease( LONG volatile *dest, LONG value ) { __wine_memory_barrier_acq_rel(); @@ -7288,6 +7297,13 @@ static FORCEINLINE LONG ReadNoFence( LONG const volatile *src ) return value; }
+static FORCEINLINE LONG64 ReadNoFence64( LONG64 const volatile *src ) +{ + LONG64 value; + __WINE_ATOMIC_LOAD_RELAXED( src, &value ); + return value; +} + static FORCEINLINE void WriteRelease( LONG volatile *dest, LONG value ) { __WINE_ATOMIC_STORE_RELEASE( dest, &value );
From: Rémi Bernon rbernon@codeweavers.com
--- dlls/win32u/winstation.c | 103 ++++++++++++++++++++++++++++++++++++++- 1 file changed, 102 insertions(+), 1 deletion(-)
diff --git a/dlls/win32u/winstation.c b/dlls/win32u/winstation.c index 3e71218200a..8148975487e 100644 --- a/dlls/win32u/winstation.c +++ b/dlls/win32u/winstation.c @@ -22,9 +22,14 @@ #pragma makedep unix #endif
+#include <assert.h> +#include <stdarg.h> +#include <stddef.h> + +#include <pthread.h> + #include "ntstatus.h" #define WIN32_NO_STATUS -#include <stdarg.h> #include "windef.h" #include "winbase.h" #include "ntuser.h" @@ -40,6 +45,97 @@ WINE_DECLARE_DEBUG_CHANNEL(win);
#define DESKTOP_ALL_ACCESS 0x01ff
+struct shared_session +{ + LONG ref; + unsigned int object_capacity; + const session_object_t *objects; +}; + +static pthread_mutex_t session_lock = PTHREAD_MUTEX_INITIALIZER; +static struct shared_session *shared_session; + +static struct shared_session *shared_session_acquire( struct shared_session *session ) +{ + int ref = InterlockedIncrement( &session->ref ); + TRACE( "session %p incrementing ref to %d\n", session, ref ); + return session; +} + +static void shared_session_release( struct shared_session *session ) +{ + int ref = InterlockedDecrement( &session->ref ); + TRACE( "session %p decrementing ref to %d\n", session, ref ); + if (!ref) + { + NtUnmapViewOfSection( GetCurrentProcess(), (void *)session->objects ); + free( session ); + } +} + +static NTSTATUS open_shared_session_section( struct shared_session *session ) +{ + static const WCHAR nameW[] = + { + '\','K','e','r','n','e','l','O','b','j','e','c','t','s','\', + '_','_','w','i','n','e','_','s','e','s','s','i','o','n',0 + }; + UNICODE_STRING name = RTL_CONSTANT_STRING( nameW ); + OBJECT_ATTRIBUTES attr; + unsigned int status; + SIZE_T size = 0; + HANDLE handle; + + InitializeObjectAttributes( &attr, &name, 0, NULL, NULL ); + if ((status = NtOpenSection( &handle, SECTION_MAP_READ, &attr ))) return status; + if (!(status = NtMapViewOfSection( handle, GetCurrentProcess(), (void **)&session->objects, 0, 0, + NULL, &size, ViewUnmap, 0, PAGE_READONLY ))) + { + session->object_capacity = size / sizeof(*session->objects); + assert( session->object_capacity != -1 ); + } + + NtClose( handle ); + return status; +} + +static NTSTATUS get_shared_session( BOOL force, struct shared_session **ret ) +{ + TRACE( "force %u\n", force ); + + pthread_mutex_lock( &session_lock ); + + if (force || !shared_session) + { + struct shared_session *session; + unsigned int status; + + if (!(session = calloc( 1, sizeof(*session) ))) + { + pthread_mutex_unlock( &session_lock ); + return STATUS_NO_MEMORY; + } + session->ref = 1; + + if ((status = open_shared_session_section( session ))) + { + pthread_mutex_unlock( &session_lock ); + ERR( "Failed to open shared session mapping, status %#x\n", status ); + free( session ); + return STATUS_UNSUCCESSFUL; + } + + if (shared_session) shared_session_release( shared_session ); + shared_session = session; + } + + *ret = shared_session_acquire( shared_session ); + + pthread_mutex_unlock( &session_lock ); + + return STATUS_SUCCESS; +} + BOOL is_virtual_desktop(void) { HANDLE desktop = NtUserGetThreadDesktop( GetCurrentThreadId() ); @@ -630,12 +726,17 @@ void winstation_init(void) { RTL_USER_PROCESS_PARAMETERS *params = NtCurrentTeb()->Peb->ProcessParameters; WCHAR *winstation = NULL, *desktop = NULL, *buffer = NULL; + struct shared_session *session; HANDLE handle, dir = NULL; OBJECT_ATTRIBUTES attr; UNICODE_STRING str; + NTSTATUS status;
static const WCHAR winsta0[] = {'W','i','n','S','t','a','0',0};
+ if (!(status = get_shared_session( FALSE, &session ))) + shared_session_release( session ); + if (params->Desktop.Length) { buffer = malloc( params->Desktop.Length + sizeof(WCHAR) );
From: Rémi Bernon rbernon@codeweavers.com
--- server/file.h | 4 +++ server/mapping.c | 77 +++++++++++++++++++++++++++++++++++++++++++++ server/protocol.def | 7 ++++- server/user.h | 1 + server/winstation.c | 8 +++++ 5 files changed, 96 insertions(+), 1 deletion(-)
diff --git a/server/file.h b/server/file.h index a7397ffd093..691487179aa 100644 --- a/server/file.h +++ b/server/file.h @@ -192,6 +192,10 @@ extern struct mapping *create_session_mapping( struct object *root, const struct unsigned int attr, const struct security_descriptor *sd ); extern void set_session_mapping( struct mapping *mapping );
+extern unsigned int alloc_shared_object(void); +extern void free_shared_object( unsigned int index ); +extern const desktop_shm_t *get_shared_desktop( unsigned int index ); + #define SHARED_WRITE_BEGIN( object_shm, type ) \ do { \ const type *__shared = (object_shm); \ diff --git a/server/mapping.c b/server/mapping.c index 79072c8b9c8..218c9456d4b 100644 --- a/server/mapping.c +++ b/server/mapping.c @@ -229,6 +229,8 @@ struct session { const session_object_t *objects; unsigned int object_capacity; + unsigned int last_object_index; + object_id_t last_object_id; }; static struct mapping *session_mapping; static struct session session; @@ -1294,11 +1296,86 @@ void set_session_mapping( struct mapping *mapping ) session_mapping = mapping; session.object_capacity = mapping->size / sizeof(*session.objects); assert( session.object_capacity != -1 ); + session.last_object_index = -1;
for (index = 0; index < session.object_capacity; index++) mark_session_object_free( &session.objects[index] ); }
+static int grow_session_mapping(void) +{ + unsigned int index, capacity; + mem_size_t size; + int unix_fd; + void *tmp; + + capacity = session.object_capacity * 3 / 2; + size = sizeof(*session.objects) * capacity; + size = (size + page_mask) & ~((mem_size_t)page_mask); + capacity = size / sizeof(*session.objects); + assert( capacity > session.object_capacity ); + + unix_fd = get_unix_fd( session_mapping->fd ); + if (!grow_file( unix_fd, size )) return -1; + + if ((tmp = mmap( NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, unix_fd, 0 )) == MAP_FAILED) + { + file_set_error(); + return -1; + } + munmap( (void *)session.objects, session_mapping->size ); + session.objects = tmp; + + for (index = session.object_capacity; index < capacity; index++) + mark_session_object_free( &session.objects[index] ); + + session_mapping->size = size; + session.object_capacity = capacity; + assert( session.object_capacity != -1 ); + + return 0; +} + +unsigned int alloc_shared_object(void) +{ + unsigned int index, offset = session.last_object_index + 1, capacity = session.object_capacity; + + for (index = offset; index != offset + capacity; index++) + if (!session.objects[index % capacity].id) + break; + if (index != offset + capacity) index %= capacity; + else + { + if (grow_session_mapping()) return -1; + index = capacity; + } + + assert( index < session.object_capacity ); + session.last_object_index = index; + + SHARED_WRITE_BEGIN( &session.objects[index].shm, object_shm_t ) + { + /* mark the object data as uninitialized */ + mark_block_uninitialized( (void *)shared, sizeof(*shared) ); + CONTAINING_RECORD( shared, session_object_t, shm )->id = ++session.last_object_id; + } + SHARED_WRITE_END; + + return index; +} + +void free_shared_object( unsigned int index ) +{ + if (index >= session.object_capacity) return; + mark_session_object_free( &session.objects[index] ); +} + +const desktop_shm_t *get_shared_desktop( unsigned int index ) +{ + if (index >= session.object_capacity) return NULL; + return &session.objects[index].shm.desktop; +} + struct object *create_user_data_mapping( struct object *root, const struct unicode_str *name, unsigned int attr, const struct security_descriptor *sd ) { diff --git a/server/protocol.def b/server/protocol.def index 81ac7a65c14..1062e0ca689 100644 --- a/server/protocol.def +++ b/server/protocol.def @@ -891,9 +891,14 @@ typedef struct /****************************************************************/ /* shared session mapping structures */
-typedef volatile union +typedef volatile struct { char placeholder; +} desktop_shm_t; + +typedef volatile union +{ + desktop_shm_t desktop; } object_shm_t;
typedef volatile struct diff --git a/server/user.h b/server/user.h index d805a179d16..6079ab92451 100644 --- a/server/user.h +++ b/server/user.h @@ -82,6 +82,7 @@ struct desktop unsigned int users; /* processes and threads using this desktop */ struct global_cursor cursor; /* global cursor information */ unsigned char keystate[256]; /* asynchronous key state */ + unsigned int session_index; /* desktop index in session shared memory */ };
/* user handles functions */ diff --git a/server/winstation.c b/server/winstation.c index 80126ad5d60..167ac8aeb62 100644 --- a/server/winstation.c +++ b/server/winstation.c @@ -297,6 +297,13 @@ static struct desktop *create_desktop( const struct unicode_str *name, unsigned list_add_tail( &winstation->desktops, &desktop->entry ); list_init( &desktop->hotkeys ); list_init( &desktop->pointers ); + desktop->session_index = alloc_shared_object(); + + if (!get_shared_desktop( desktop->session_index )) + { + release_object( desktop ); + return NULL; + } } else { @@ -366,6 +373,7 @@ static void desktop_destroy( struct object *obj ) if (desktop->global_hooks) release_object( desktop->global_hooks ); if (desktop->close_timeout) remove_timeout_user( desktop->close_timeout ); release_object( desktop->winstation ); + free_shared_object( desktop->session_index ); }
/* retrieve the thread desktop, checking the handle access rights */
From: Rémi Bernon rbernon@codeweavers.com
--- server/file.h | 1 + server/mapping.c | 7 +++++++ server/protocol.def | 10 +++++++++- server/trace.c | 7 +++++++ server/winstation.c | 11 +++++++++++ tools/make_requests | 1 + 6 files changed, 36 insertions(+), 1 deletion(-)
diff --git a/server/file.h b/server/file.h index 691487179aa..0242fb3b3e7 100644 --- a/server/file.h +++ b/server/file.h @@ -194,6 +194,7 @@ extern void set_session_mapping( struct mapping *mapping );
extern unsigned int alloc_shared_object(void); extern void free_shared_object( unsigned int index ); +extern obj_locator_t get_session_object_locator( unsigned int index ); extern const desktop_shm_t *get_shared_desktop( unsigned int index );
#define SHARED_WRITE_BEGIN( object_shm, type ) \ diff --git a/server/mapping.c b/server/mapping.c index 218c9456d4b..3937817d264 100644 --- a/server/mapping.c +++ b/server/mapping.c @@ -1370,6 +1370,13 @@ void free_shared_object( unsigned int index ) mark_session_object_free( &session.objects[index] ); }
+obj_locator_t get_session_object_locator( unsigned int index ) +{ + obj_locator_t locator = {.index = index}; + if (index < session.object_capacity) locator.id = session.objects[index].id; + return locator; +} + const desktop_shm_t *get_shared_desktop( unsigned int index ) { if (index >= session.object_capacity) return NULL; diff --git a/server/protocol.def b/server/protocol.def index 1062e0ca689..b9eb8b6108e 100644 --- a/server/protocol.def +++ b/server/protocol.def @@ -908,6 +908,13 @@ typedef volatile struct object_shm_t shm; /* object shared data */ } session_object_t;
+typedef struct +{ + object_id_t id; /* object unique id, object data is valid if != 0 */ + unsigned int index; /* index of the object in session shared memory */ + int __pad; +} obj_locator_t; + /****************************************************************/ /* Request declarations */
@@ -2819,7 +2826,8 @@ enum coords_relative @REQ(get_thread_desktop) thread_id_t tid; /* thread id */ @REPLY - obj_handle_t handle; /* handle to the desktop */ + obj_handle_t handle; /* handle to the desktop */ + obj_locator_t locator; /* locator for the shared session object */ @END
diff --git a/server/trace.c b/server/trace.c index d76d13152aa..94e74e3e3c1 100644 --- a/server/trace.c +++ b/server/trace.c @@ -467,6 +467,13 @@ static void dump_hw_input( const char *prefix, const hw_input_t *input ) } }
+static void dump_obj_locator( const char *prefix, const obj_locator_t *locator ) +{ + fprintf( stderr, "%s{", prefix ); + dump_uint64( "id=", &locator->id ); + fprintf( stderr, ",index=%u}", locator->index ); +} + static void dump_luid( const char *prefix, const struct luid *luid ) { fprintf( stderr, "%s%d.%u", prefix, luid->high_part, luid->low_part ); diff --git a/server/winstation.c b/server/winstation.c index 167ac8aeb62..6c47811c6f6 100644 --- a/server/winstation.c +++ b/server/winstation.c @@ -741,10 +741,21 @@ DECL_HANDLER(close_desktop) /* get the thread current desktop */ DECL_HANDLER(get_thread_desktop) { + struct desktop *desktop; struct thread *thread;
+ reply->locator.id = 0; + if (!(thread = get_thread_from_id( req->tid ))) return; reply->handle = thread->desktop; + + if (!(desktop = get_thread_desktop( thread, 0 ))) clear_error(); + else + { + reply->locator = get_session_object_locator( desktop->session_index ); + release_object( desktop ); + } + release_object( thread ); }
diff --git a/tools/make_requests b/tools/make_requests index b20b53096ca..36254faec40 100755 --- a/tools/make_requests +++ b/tools/make_requests @@ -53,6 +53,7 @@ my %formats = "generic_map_t" => [ 16, 4, "&dump_generic_map" ], "ioctl_code_t" => [ 4, 4, "&dump_ioctl_code" ], "hw_input_t" => [ 40, 8, "&dump_hw_input" ], + "obj_locator_t" => [ 16, 8, "&dump_obj_locator" ], # varargs-only structures "apc_call_t" => [ 64, 8 ], "context_t" => [ 1728, 8 ],
From: Rémi Bernon rbernon@codeweavers.com
--- dlls/win32u/ntuser_private.h | 1 + dlls/win32u/sysparams.c | 1 + dlls/win32u/win32u_private.h | 19 +++++ dlls/win32u/winstation.c | 143 +++++++++++++++++++++++++++++++++-- 4 files changed, 159 insertions(+), 5 deletions(-)
diff --git a/dlls/win32u/ntuser_private.h b/dlls/win32u/ntuser_private.h index 11b1a3ff8a1..960e82dc15f 100644 --- a/dlls/win32u/ntuser_private.h +++ b/dlls/win32u/ntuser_private.h @@ -128,6 +128,7 @@ struct user_thread_info UINT spy_indent; /* Current spy indent */ BOOL clipping_cursor; /* thread is currently clipping */ DWORD clipping_reset; /* time when clipping was last reset */ + struct session_thread_data *session_data; /* shared session thread data */ };
C_ASSERT( sizeof(struct user_thread_info) <= sizeof(((TEB *)0)->Win32ClientInfo) ); diff --git a/dlls/win32u/sysparams.c b/dlls/win32u/sysparams.c index 6993373ca54..891b2ca8589 100644 --- a/dlls/win32u/sysparams.c +++ b/dlls/win32u/sysparams.c @@ -6201,6 +6201,7 @@ static void thread_detach(void)
cleanup_imm_thread(); NtClose( thread_info->server_queue ); + free( thread_info->session_data );
exiting_thread_id = 0; } diff --git a/dlls/win32u/win32u_private.h b/dlls/win32u/win32u_private.h index ff861db4dd9..0c800e4d10e 100644 --- a/dlls/win32u/win32u_private.h +++ b/dlls/win32u/win32u_private.h @@ -194,6 +194,25 @@ extern void user_check_not_lock(void); extern BOOL get_vulkan_uuid_from_luid( const LUID *luid, GUID *uuid );
/* winstation.c */ + +struct shared_session; + +struct object_lock +{ + UINT64 id; + UINT64 seq; + struct shared_session *session; /* only valid when locked */ +}; +#define OBJECT_LOCK_INIT {0} + +/* Get shared session object's data pointer, must be called in a loop while STATUS_PENDING + * is returned, lock must be initialized with OBJECT_LOCK_INIT. + * + * The data read from the objects may be transient and no logic should be executed based + * on it, within the loop, or after, unless the function has returned STATUS_SUCCESS. + */ +extern NTSTATUS get_shared_desktop( struct object_lock *lock, const desktop_shm_t **desktop_shm ); + extern BOOL is_virtual_desktop(void);
/* window.c */ diff --git a/dlls/win32u/winstation.c b/dlls/win32u/winstation.c index 8148975487e..f8d9b76238c 100644 --- a/dlls/win32u/winstation.c +++ b/dlls/win32u/winstation.c @@ -45,6 +45,11 @@ WINE_DECLARE_DEBUG_CHANNEL(win);
#define DESKTOP_ALL_ACCESS 0x01ff
+struct session_thread_data +{ + obj_locator_t shared_desktop; /* thread desktop shared session object locator */ +}; + struct shared_session { LONG ref; @@ -55,6 +60,32 @@ struct shared_session static pthread_mutex_t session_lock = PTHREAD_MUTEX_INITIALIZER; static struct shared_session *shared_session;
+static struct session_thread_data *get_session_thread_data(void) +{ + struct user_thread_info *thread_info = get_user_thread_info(); + if (!thread_info->session_data) thread_info->session_data = calloc(1, sizeof(*thread_info->session_data)); + return thread_info->session_data; +} + +#if defined(__i386__) || defined(__x86_64__) +/* this prevents compilers from incorrectly reordering non-volatile reads (e.g., memcpy) from shared memory */ +#define __SHARED_READ_FENCE do { __asm__ __volatile__( "" ::: "memory" ); } while (0) +#else +#define __SHARED_READ_FENCE __atomic_thread_fence( __ATOMIC_ACQUIRE ) +#endif + +static void session_object_acquire_seqlock( const session_object_t *object, UINT64 *seq ) +{ + while ((*seq = ReadNoFence64( &object->seq )) & 1) YieldProcessor(); + __SHARED_READ_FENCE; +} + +static BOOL session_object_release_seqlock( const session_object_t *object, UINT64 seq ) +{ + __SHARED_READ_FENCE; + return ReadNoFence64( &object->seq ) == seq; +} + static struct shared_session *shared_session_acquire( struct shared_session *session ) { int ref = InterlockedIncrement( &session->ref ); @@ -136,6 +167,104 @@ static NTSTATUS get_shared_session( BOOL force, struct shared_session **ret ) return STATUS_SUCCESS; }
+enum object_type +{ + OBJECT_TYPE_DESKTOP = 1, +}; + +static NTSTATUS get_thread_session_object_locator( UINT tid, enum object_type type, obj_locator_t *locator ) +{ + NTSTATUS status; + + TRACE( "tid %04x, type %u, locator %p\n", tid, type, locator ); + + switch (type) + { + case OBJECT_TYPE_DESKTOP: + SERVER_START_REQ( get_thread_desktop ) + { + req->tid = tid; + if (!(status = wine_server_call( req ))) + { + if (!reply->locator.id) status = STATUS_INVALID_HANDLE; + else *locator = reply->locator; + } + } + SERVER_END_REQ; + break; + default: + ERR( "Invalid session object type %u\n", type ); + return STATUS_INVALID_PARAMETER; + } + + return status; +} + +/* return a locked session object for a thread id and type */ +static NTSTATUS get_thread_session_object( UINT tid, enum object_type type, obj_locator_t *locator, + struct object_lock *lock, const object_shm_t **object_shm ) +{ + struct shared_session *session; + BOOL session_valid = TRUE; + NTSTATUS status; + + assert( !lock->id || *object_shm ); + + TRACE( "tid %04x, type %u, locator %p, lock %p, object_shm %p\n", tid, type, locator, lock, object_shm ); + + if (lock->id) + { + /* lock was previously acquired, finish reading and check data consistency */ + const session_object_t *object = CONTAINING_RECORD( *object_shm, session_object_t, shm ); + BOOL valid = lock->id == object->id; + + if (!session_object_release_seqlock( object, lock->seq )) + { + /* retry if seq doesn't match, wineserver has written to it */ + session_object_acquire_seqlock( object, &lock->seq ); + return STATUS_PENDING; + } + + shared_session_release( lock->session ); + memset( lock, 0, sizeof(*lock) ); + + if (valid) return STATUS_SUCCESS; + locator->id = 0; /* invalidate locator if the lock was abandoned due to id mismatch */ + } + + while (!(status = get_shared_session( !session_valid, &session ))) + { + if (!locator->id && (status = get_thread_session_object_locator( tid, type, locator ))) break; + if ((session_valid = locator->index < session->object_capacity)) + { + const session_object_t *object = &session->objects[locator->index]; + lock->id = locator->id; + lock->session = session; + *object_shm = &object->shm; + session_object_acquire_seqlock( object, &lock->seq ); + return STATUS_PENDING; + } + shared_session_release( session ); + memset( locator, 0, sizeof(*locator) ); + } + + WARN( "Failed to find object type %u for thread %04x\n", type, tid ); + if (!status) shared_session_release( session ); + memset( locator, 0, sizeof(*locator) ); + return STATUS_UNSUCCESSFUL; +} + +NTSTATUS get_shared_desktop( struct object_lock *lock, const desktop_shm_t **desktop_shm ) +{ + struct session_thread_data *data = get_session_thread_data(); + obj_locator_t *locator = &data->shared_desktop; + + TRACE( "lock %p, desktop_shm %p\n", lock, desktop_shm ); + + return get_thread_session_object( GetCurrentThreadId(), OBJECT_TYPE_DESKTOP, locator, + lock, (const object_shm_t **)desktop_shm ); +} + BOOL is_virtual_desktop(void) { HANDLE desktop = NtUserGetThreadDesktop( GetCurrentThreadId() ); @@ -357,9 +486,18 @@ BOOL WINAPI NtUserSetThreadDesktop( HDESK handle ) { struct user_thread_info *thread_info = get_user_thread_info(); struct user_key_state_info *key_state_info = thread_info->key_state; + obj_locator_t *locator = &get_session_thread_data()->shared_desktop; + struct object_lock lock = OBJECT_LOCK_INIT; + const desktop_shm_t *desktop_shm; + thread_info->client_info.top_window = 0; thread_info->client_info.msg_window = 0; if (key_state_info) key_state_info->time = 0; + memset( locator, 0, sizeof(*locator) ); + + while (get_shared_desktop( &lock, &desktop_shm ) == STATUS_PENDING) + /* nothing */; + if (was_virtual_desktop != is_virtual_desktop()) update_display_cache( FALSE ); } return ret; @@ -726,17 +864,12 @@ void winstation_init(void) { RTL_USER_PROCESS_PARAMETERS *params = NtCurrentTeb()->Peb->ProcessParameters; WCHAR *winstation = NULL, *desktop = NULL, *buffer = NULL; - struct shared_session *session; HANDLE handle, dir = NULL; OBJECT_ATTRIBUTES attr; UNICODE_STRING str; - NTSTATUS status;
static const WCHAR winsta0[] = {'W','i','n','S','t','a','0',0};
- if (!(status = get_shared_session( FALSE, &session ))) - shared_session_release( session ); - if (params->Desktop.Length) { buffer = malloc( params->Desktop.Length + sizeof(WCHAR) );
From: Rémi Bernon rbernon@codeweavers.com
Based on a patch by Huw Davies huw@codeweavers.com. --- server/protocol.def | 8 ++++- server/queue.c | 78 ++++++++++++++++++++++++++++----------------- server/user.h | 2 -- server/winstation.c | 11 ++++++- 4 files changed, 65 insertions(+), 34 deletions(-)
diff --git a/server/protocol.def b/server/protocol.def index b9eb8b6108e..c55f1d03136 100644 --- a/server/protocol.def +++ b/server/protocol.def @@ -891,9 +891,15 @@ typedef struct /****************************************************************/ /* shared session mapping structures */
+struct shared_cursor +{ + int x; /* cursor position */ + int y; +}; + typedef volatile struct { - char placeholder; + struct shared_cursor cursor; /* global cursor information */ } desktop_shm_t;
typedef volatile union diff --git a/server/queue.c b/server/queue.c index ed099b3b989..3780e35d83e 100644 --- a/server/queue.c +++ b/server/queue.c @@ -418,6 +418,7 @@ static void queue_cursor_message( struct desktop *desktop, user_handle_t win, un lparam_t wparam, lparam_t lparam ) { static const struct hw_msg_source source = { IMDT_UNAVAILABLE, IMO_SYSTEM }; + const desktop_shm_t *desktop_shm = get_shared_desktop( desktop->session_index ); struct thread_input *input; struct message *msg;
@@ -426,8 +427,8 @@ static void queue_cursor_message( struct desktop *desktop, user_handle_t win, un msg->msg = message; msg->wparam = wparam; msg->lparam = lparam; - msg->x = desktop->cursor.x; - msg->y = desktop->cursor.y; + msg->x = desktop_shm->cursor.x; + msg->y = desktop_shm->cursor.y; if (!(msg->win = win) && (input = desktop->foreground_input)) msg->win = input->active; queue_hardware_message( desktop, msg, 1 ); } @@ -465,13 +466,20 @@ static int update_desktop_cursor_window( struct desktop *desktop, user_handle_t
static int update_desktop_cursor_pos( struct desktop *desktop, user_handle_t win, int x, int y ) { + const desktop_shm_t *desktop_shm = get_shared_desktop( desktop->session_index ); int updated;
x = max( min( x, desktop->cursor.clip.right - 1 ), desktop->cursor.clip.left ); y = max( min( y, desktop->cursor.clip.bottom - 1 ), desktop->cursor.clip.top ); - updated = (desktop->cursor.x != x || desktop->cursor.y != y); - desktop->cursor.x = x; - desktop->cursor.y = y; + + SHARED_WRITE_BEGIN( desktop_shm, desktop_shm_t ) + { + updated = shared->cursor.x != x || shared->cursor.y != y; + shared->cursor.x = x; + shared->cursor.y = y; + } + SHARED_WRITE_END; + desktop->cursor.last_change = get_tick_count();
if (!win || !is_window_visible( win ) || is_window_transparent( win )) @@ -517,15 +525,17 @@ static void set_cursor_pos( struct desktop *desktop, int x, int y ) static void get_message_defaults( struct msg_queue *queue, int *x, int *y, unsigned int *time ) { struct desktop *desktop = queue->input->desktop; + const desktop_shm_t *desktop_shm = get_shared_desktop( desktop->session_index );
- *x = desktop->cursor.x; - *y = desktop->cursor.y; + *x = desktop_shm->cursor.x; + *y = desktop_shm->cursor.y; *time = get_tick_count(); }
/* set the cursor clip rectangle */ void set_clip_rectangle( struct desktop *desktop, const rectangle_t *rect, unsigned int flags, int reset ) { + const desktop_shm_t *desktop_shm = get_shared_desktop( desktop->session_index ); rectangle_t top_rect; unsigned int old_flags; int x, y; @@ -547,9 +557,9 @@ void set_clip_rectangle( struct desktop *desktop, const rectangle_t *rect, unsig desktop->cursor.clip_flags = flags;
/* warp the mouse to be inside the clip rect */ - x = max( min( desktop->cursor.x, desktop->cursor.clip.right - 1 ), desktop->cursor.clip.left ); - y = max( min( desktop->cursor.y, desktop->cursor.clip.bottom - 1 ), desktop->cursor.clip.top ); - if (x != desktop->cursor.x || y != desktop->cursor.y) set_cursor_pos( desktop, x, y ); + x = max( min( desktop_shm->cursor.x, desktop->cursor.clip.right - 1 ), desktop->cursor.clip.left ); + y = max( min( desktop_shm->cursor.y, desktop->cursor.clip.bottom - 1 ), desktop->cursor.clip.top ); + if (x != desktop_shm->cursor.x || y != desktop_shm->cursor.y) set_cursor_pos( desktop, x, y );
/* request clip cursor rectangle reset to the desktop thread */ if (reset) post_desktop_message( desktop, WM_WINE_CLIPCURSOR, flags, FALSE ); @@ -1673,6 +1683,7 @@ static void prepend_cursor_history( int x, int y, unsigned int time, lparam_t in /* queue a hardware message into a given thread input */ static void queue_hardware_message( struct desktop *desktop, struct message *msg, int always_queue ) { + const desktop_shm_t *desktop_shm = get_shared_desktop( desktop->session_index ); user_handle_t win; struct thread *thread; struct thread_input *input; @@ -1705,8 +1716,8 @@ static void queue_hardware_message( struct desktop *desktop, struct message *msg if (desktop->keystate[VK_XBUTTON2] & 0x80) msg->wparam |= MK_XBUTTON2; break; } - msg->x = desktop->cursor.x; - msg->y = desktop->cursor.y; + msg->x = desktop_shm->cursor.x; + msg->y = desktop_shm->cursor.y;
if (msg->win && (thread = get_window_thread( msg->win ))) { @@ -1988,6 +1999,7 @@ static void dispatch_rawinput_message( struct desktop *desktop, struct rawinput_ static int queue_mouse_message( struct desktop *desktop, user_handle_t win, const hw_input_t *input, unsigned int origin, struct msg_queue *sender ) { + const desktop_shm_t *desktop_shm = get_shared_desktop( desktop->session_index ); const struct rawinput_device *device; struct hardware_msg_data *msg_data; struct rawinput_message raw_msg; @@ -2026,19 +2038,19 @@ static int queue_mouse_message( struct desktop *desktop, user_handle_t win, cons x = input->mouse.x; y = input->mouse.y; if (flags & ~(MOUSEEVENTF_MOVE | MOUSEEVENTF_ABSOLUTE) && - x == desktop->cursor.x && y == desktop->cursor.y) + x == desktop_shm->cursor.x && y == desktop_shm->cursor.y) flags &= ~MOUSEEVENTF_MOVE; } else { - x = desktop->cursor.x + input->mouse.x; - y = desktop->cursor.y + input->mouse.y; + x = desktop_shm->cursor.x + input->mouse.x; + y = desktop_shm->cursor.y + input->mouse.y; } } else { - x = desktop->cursor.x; - y = desktop->cursor.y; + x = desktop_shm->cursor.x; + y = desktop_shm->cursor.y; }
if ((foreground = get_foreground_thread( desktop, win ))) @@ -2049,7 +2061,7 @@ static int queue_mouse_message( struct desktop *desktop, user_handle_t win, cons raw_msg.time = time; raw_msg.message = WM_INPUT; raw_msg.flags = flags; - rawmouse_init( &raw_msg.rawinput, &raw_msg.data.mouse, x - desktop->cursor.x, y - desktop->cursor.y, + rawmouse_init( &raw_msg.rawinput, &raw_msg.data.mouse, x - desktop_shm->cursor.x, y - desktop_shm->cursor.y, raw_msg.flags, input->mouse.data, input->mouse.info );
dispatch_rawinput_message( desktop, &raw_msg ); @@ -2251,6 +2263,7 @@ static void queue_pointer_message( struct pointer *pointer, int repeated ) }; struct hw_msg_source source = { IMDT_UNAVAILABLE, IMDT_TOUCH }; struct desktop *desktop = pointer->desktop; + const desktop_shm_t *desktop_shm = get_shared_desktop( desktop->session_index ); const hw_input_t *input = &pointer->input; unsigned int i, wparam = input->hw.wparam; timeout_t time = get_tick_count(); @@ -2273,8 +2286,8 @@ static void queue_pointer_message( struct pointer *pointer, int repeated ) msg->msg = messages[input->hw.msg - WM_POINTERUPDATE][i]; msg->wparam = wparam; msg->lparam = MAKELONG(x, y); - msg->x = desktop->cursor.x; - msg->y = desktop->cursor.y; + msg->x = desktop_shm->cursor.x; + msg->y = desktop_shm->cursor.y;
queue_hardware_message( desktop, msg, 1 ); } @@ -2329,6 +2342,7 @@ static struct pointer *find_pointer_from_id( struct desktop *desktop, unsigned i static void queue_custom_hardware_message( struct desktop *desktop, user_handle_t win, unsigned int origin, const hw_input_t *input ) { + const desktop_shm_t *desktop_shm = get_shared_desktop( desktop->session_index ); struct hw_msg_source source = { IMDT_UNAVAILABLE, origin }; struct thread *foreground; struct pointer *pointer; @@ -2373,8 +2387,8 @@ static void queue_custom_hardware_message( struct desktop *desktop, user_handle_ msg->msg = input->hw.msg; msg->wparam = input->hw.wparam; msg->lparam = input->hw.lparam; - msg->x = desktop->cursor.x; - msg->y = desktop->cursor.y; + msg->x = desktop_shm->cursor.x; + msg->y = desktop_shm->cursor.y;
queue_hardware_message( desktop, msg, 1 ); } @@ -2922,6 +2936,7 @@ DECL_HANDLER(send_hardware_message) struct desktop *desktop; unsigned int origin = (req->flags & SEND_HWMSG_INJECTED ? IMO_INJECTED : IMO_HARDWARE); struct msg_queue *sender = req->flags & SEND_HWMSG_INJECTED ? get_current_queue() : NULL; + const desktop_shm_t *desktop_shm; int wait = 0;
if (!(desktop = get_hardware_input_desktop( req->win ))) return; @@ -2932,9 +2947,10 @@ DECL_HANDLER(send_hardware_message) set_error( STATUS_ACCESS_DENIED ); return; } + desktop_shm = get_shared_desktop( desktop->session_index );
- reply->prev_x = desktop->cursor.x; - reply->prev_y = desktop->cursor.y; + reply->prev_x = desktop_shm->cursor.x; + reply->prev_y = desktop_shm->cursor.y;
switch (req->input.type) { @@ -2952,8 +2968,8 @@ DECL_HANDLER(send_hardware_message) }
reply->wait = sender ? wait : 0; - reply->new_x = desktop->cursor.x; - reply->new_y = desktop->cursor.y; + reply->new_x = desktop_shm->cursor.x; + reply->new_y = desktop_shm->cursor.y; release_object( desktop ); }
@@ -3646,16 +3662,18 @@ DECL_HANDLER(set_cursor) user_handle_t prev_cursor, new_cursor; struct thread_input *input; struct desktop *desktop; + const desktop_shm_t *desktop_shm;
if (!queue) return; input = queue->input; desktop = input->desktop; + desktop_shm = get_shared_desktop( desktop->session_index ); prev_cursor = input->cursor_count < 0 ? 0 : input->cursor;
reply->prev_handle = input->cursor; reply->prev_count = input->cursor_count; - reply->prev_x = desktop->cursor.x; - reply->prev_y = desktop->cursor.y; + reply->prev_x = desktop_shm->cursor.x; + reply->prev_y = desktop_shm->cursor.y;
if (req->flags & SET_CURSOR_HANDLE) { @@ -3678,8 +3696,8 @@ DECL_HANDLER(set_cursor) new_cursor = input->cursor_count < 0 ? 0 : input->cursor; if (prev_cursor != new_cursor) update_desktop_cursor_handle( desktop, input, new_cursor );
- reply->new_x = desktop->cursor.x; - reply->new_y = desktop->cursor.y; + reply->new_x = desktop_shm->cursor.x; + reply->new_y = desktop_shm->cursor.y; reply->new_clip = desktop->cursor.clip; reply->last_change = desktop->cursor.last_change; } diff --git a/server/user.h b/server/user.h index 6079ab92451..229439fbe5e 100644 --- a/server/user.h +++ b/server/user.h @@ -56,8 +56,6 @@ struct winstation
struct global_cursor { - int x; /* cursor position */ - int y; rectangle_t clip; /* cursor clip rectangle */ unsigned int clip_flags; /* last cursor clip flags */ unsigned int last_change; /* time of last position change */ diff --git a/server/winstation.c b/server/winstation.c index 6c47811c6f6..d547e9b8d86 100644 --- a/server/winstation.c +++ b/server/winstation.c @@ -272,6 +272,8 @@ static struct desktop *create_desktop( const struct unicode_str *name, unsigned { if (get_error() != STATUS_OBJECT_NAME_EXISTS) { + const desktop_shm_t *desktop_shm; + /* initialize it if it didn't already exist */
desktop->flags = flags; @@ -299,11 +301,18 @@ static struct desktop *create_desktop( const struct unicode_str *name, unsigned list_init( &desktop->pointers ); desktop->session_index = alloc_shared_object();
- if (!get_shared_desktop( desktop->session_index )) + if (!(desktop_shm = get_shared_desktop( desktop->session_index ))) { release_object( desktop ); return NULL; } + + SHARED_WRITE_BEGIN( desktop_shm, desktop_shm_t ) + { + shared->cursor.x = 0; + shared->cursor.y = 0; + } + SHARED_WRITE_END; } else {
From: Rémi Bernon rbernon@codeweavers.com
Based on a patch by Huw Davies huw@codeweavers.com. --- server/protocol.def | 1 + server/queue.c | 17 +++++++++++------ server/user.h | 1 - server/winstation.c | 1 + 4 files changed, 13 insertions(+), 7 deletions(-)
diff --git a/server/protocol.def b/server/protocol.def index c55f1d03136..afb508c425a 100644 --- a/server/protocol.def +++ b/server/protocol.def @@ -895,6 +895,7 @@ struct shared_cursor { int x; /* cursor position */ int y; + unsigned int last_change; /* time of last position change */ };
typedef volatile struct diff --git a/server/queue.c b/server/queue.c index 3780e35d83e..3ebf5e18de1 100644 --- a/server/queue.c +++ b/server/queue.c @@ -468,6 +468,7 @@ static int update_desktop_cursor_pos( struct desktop *desktop, user_handle_t win { const desktop_shm_t *desktop_shm = get_shared_desktop( desktop->session_index ); int updated; + unsigned int time = get_tick_count();
x = max( min( x, desktop->cursor.clip.right - 1 ), desktop->cursor.clip.left ); y = max( min( y, desktop->cursor.clip.bottom - 1 ), desktop->cursor.clip.top ); @@ -477,11 +478,10 @@ static int update_desktop_cursor_pos( struct desktop *desktop, user_handle_t win updated = shared->cursor.x != x || shared->cursor.y != y; shared->cursor.x = x; shared->cursor.y = y; + shared->cursor.last_change = time; } SHARED_WRITE_END;
- desktop->cursor.last_change = get_tick_count(); - if (!win || !is_window_visible( win ) || is_window_transparent( win )) win = shallow_window_from_point( desktop, x, y ); if (update_desktop_cursor_window( desktop, win )) updated = 1; @@ -2005,7 +2005,7 @@ static int queue_mouse_message( struct desktop *desktop, user_handle_t win, cons struct rawinput_message raw_msg; struct message *msg; struct thread *foreground; - unsigned int i, time, flags; + unsigned int i, time = get_tick_count(), flags; struct hw_msg_source source = { IMDT_MOUSE, origin }; int wait = 0, x, y;
@@ -2026,10 +2026,15 @@ static int queue_mouse_message( struct desktop *desktop, user_handle_t win, cons WM_MOUSEHWHEEL /* 0x1000 = MOUSEEVENTF_HWHEEL */ };
- desktop->cursor.last_change = get_tick_count(); + SHARED_WRITE_BEGIN( desktop_shm, desktop_shm_t ) + { + shared->cursor.last_change = time; + } + SHARED_WRITE_END; + flags = input->mouse.flags; time = input->mouse.time; - if (!time) time = desktop->cursor.last_change; + if (!time) time = desktop_shm->cursor.last_change;
if (flags & MOUSEEVENTF_MOVE) { @@ -3699,7 +3704,7 @@ DECL_HANDLER(set_cursor) reply->new_x = desktop_shm->cursor.x; reply->new_y = desktop_shm->cursor.y; reply->new_clip = desktop->cursor.clip; - reply->last_change = desktop->cursor.last_change; + reply->last_change = desktop_shm->cursor.last_change; }
/* Get the history of the 64 last cursor positions */ diff --git a/server/user.h b/server/user.h index 229439fbe5e..3adfe29073b 100644 --- a/server/user.h +++ b/server/user.h @@ -58,7 +58,6 @@ struct global_cursor { rectangle_t clip; /* cursor clip rectangle */ unsigned int clip_flags; /* last cursor clip flags */ - unsigned int last_change; /* time of last position change */ user_handle_t win; /* window that contains the cursor */ };
diff --git a/server/winstation.c b/server/winstation.c index d547e9b8d86..fcfcb8f419e 100644 --- a/server/winstation.c +++ b/server/winstation.c @@ -311,6 +311,7 @@ static struct desktop *create_desktop( const struct unicode_str *name, unsigned { shared->cursor.x = 0; shared->cursor.y = 0; + shared->cursor.last_change = 0; } SHARED_WRITE_END; }
From: Rémi Bernon rbernon@codeweavers.com
Based on a patch by Huw Davies huw@codeweavers.com. --- dlls/win32u/input.c | 18 +++++++++--------- dlls/win32u/winstation.c | 7 ------- 2 files changed, 9 insertions(+), 16 deletions(-)
diff --git a/dlls/win32u/input.c b/dlls/win32u/input.c index 04532e7d015..2b0f59095e2 100644 --- a/dlls/win32u/input.c +++ b/dlls/win32u/input.c @@ -739,22 +739,22 @@ BOOL WINAPI NtUserSetCursorPos( INT x, INT y ) */ BOOL get_cursor_pos( POINT *pt ) { + struct object_lock lock = OBJECT_LOCK_INIT; + const desktop_shm_t *desktop_shm; BOOL ret; - DWORD last_change; + DWORD last_change = 0; + NTSTATUS status; UINT dpi;
if (!pt) return FALSE;
- SERVER_START_REQ( set_cursor ) + while ((status = get_shared_desktop( &lock, &desktop_shm )) == STATUS_PENDING) { - if ((ret = !wine_server_call( req ))) - { - pt->x = reply->new_x; - pt->y = reply->new_y; - last_change = reply->last_change; - } + pt->x = desktop_shm->cursor.x; + pt->y = desktop_shm->cursor.y; + last_change = desktop_shm->cursor.last_change; } - SERVER_END_REQ; + ret = !status;
/* query new position from graphics driver if we haven't updated recently */ if (ret && NtGetTickCount() - last_change > 100) ret = user_driver->pGetCursorPos( pt ); diff --git a/dlls/win32u/winstation.c b/dlls/win32u/winstation.c index f8d9b76238c..c13d35c0e05 100644 --- a/dlls/win32u/winstation.c +++ b/dlls/win32u/winstation.c @@ -487,17 +487,10 @@ BOOL WINAPI NtUserSetThreadDesktop( HDESK handle ) struct user_thread_info *thread_info = get_user_thread_info(); struct user_key_state_info *key_state_info = thread_info->key_state; obj_locator_t *locator = &get_session_thread_data()->shared_desktop; - struct object_lock lock = OBJECT_LOCK_INIT; - const desktop_shm_t *desktop_shm; - thread_info->client_info.top_window = 0; thread_info->client_info.msg_window = 0; if (key_state_info) key_state_info->time = 0; memset( locator, 0, sizeof(*locator) ); - - while (get_shared_desktop( &lock, &desktop_shm ) == STATUS_PENDING) - /* nothing */; - if (was_virtual_desktop != is_virtual_desktop()) update_display_cache( FALSE ); } return ret;
With separate mappings out of the way, it's much closer now to what we will need for user handles. There are some unneeded differences, through. The assumption that shared mapping is an array of fixed size objects is something that would need to be changed to objects like windows. While things like an allocator may be changed later, I'd suggest to keep the layout private to server at this point by replacing object index with a mapping offset.
On Fri May 17 08:36:29 2024 +0000, Jacek Caban wrote:
With separate mappings out of the way, it's much closer now to what we will need for user handles. There are some unneeded differences, through. The assumption that shared mapping is an array of fixed size objects is something that would need to be changed to objects like windows. While things like an allocator may be changed later, I'd suggest to keep the layout private to server at this point by replacing object index with a mapping offset.
I don't think we can make object layout private to the server without changing, again, the object synchronization logic, and it is not trivial.
We use object ids to decide on whether objects have been invalidated, from the client side, and whether server needs to be called. The ids are located in the object headers and are never used for something else, and therefore are safe to use from the client side as an object invalidation marker.
Changing object layouts to be fully variable in size would require knowledge from the server side, of whether objects are still referenced from the client side or not, before they can be actually reused. This introduce an additional synchronization requirement that would IMO be better to avoid.
If we need variable sized window data, we can always put it after the object array, in a completely variable size shared heap and the window objects would have an offset to their variable data. The object synchronization stays the same, and the variable data and offset are valid only while the object itself is valid and may be read only while the object is locked.
Then TBH I don't like much the idea of implementing a shared heap on the server side, it introduces a lot of complexity and potential source of failures, and I avoided it here for that reason.
We use object ids to decide on whether objects have been invalidated, from the client side, and whether server needs to be called. The ids are located in the object headers and are never used for something else, and therefore are safe to use from the client side as an object invalidation marker.
Sure, that's what we need to guarantee from server, but that doesn't require exposing entire mapping layout. Changing index to offset in your patch wouldn't take away anything from the client that it needs, locking could stay the same.
That said, a ref counted session object in client feels like an unneeded complexity. If you simply never unmapped memory, the whole thing wouldn't be needed. If you'd map only new chunks when the mapping needs to be enlarged, it wouldn't really affect VM usage.
Changing object layouts to be fully variable in size would require knowledge from the server side, of whether objects are still referenced from the client side or not, before they can be actually reused. This introduce an additional synchronization requirement that would IMO be better to avoid.
It sounds to me as simple as using a separated free lists for allocations (to guarantee that it will be reused only by something following the same synchronization protocol).
Then TBH I don't like much the idea of implementing a shared heap on the server side, it introduces a lot of complexity and potential source of failures, and I avoided it here for that reason.
TBH, I think you're exaggerating that complexity.
That said, a ref counted session object in client feels like an unneeded complexity. If you simply never unmapped memory, the whole thing wouldn't be needed. If you'd map only new chunks when the mapping needs to be enlarged, it wouldn't really affect VM usage.
That's orthogonal to the variable size issue. Sure, mapping the session in chunks is possible, but it's just a different approach and doesn't change much: instead of refcounting the session you'd need to add some logic to keep chunks around and map new ones.
Sure, that's what we need to guarantee from server, but that doesn't require exposing entire mapping layout. Changing index to offset in your patch wouldn't take away anything from the client that it needs, locking could stay the same.
It sounds to me as simple as using a separated free lists for allocations (to guarantee that it will be reused only by something following the same synchronization protocol).
The server currently doesn't have any mean to know which objects are being cached / read by the clients, it can only invalidate them by changing their IDs, but other than that have no way to safely merge them together [*]. This would require refcounting of the objects on the server side, track object open/close operations, and release them as well when the process dies violently.
TBH, I think you're exaggerating that complexity.
Writing a basic heap is easy, but writing a good one, robust to fragmentation for instance, not so much.
[*] Or unless you mean just put objects in a free list without trying to coalesce them, and not bothering about fragmentation at all? That doesn't seem very nice.
That's orthogonal to the variable size issue. Sure, mapping the session in chunks is possible, but it's just a different approach and doesn't change much: instead of refcounting the session you'd need to add some logic to keep chunks around and map new ones.
Sure, that's orthogonal.
The server currently doesn't have any mean to know which objects are being cached / read by the clients, it can only invalidate them by changing their IDs, but other than that have no way to safely merge them together [*]. This would require refcounting of the objects on the server side, track object open/close operations, and release them as well when the process dies violently.
We could just never release such objects to the global pool and keep their free list separated. Again, that's not a concern at this point, but it's not a hard problem if needed.
TBH, I think you're exaggerating that complexity.
Writing a basic heap is easy, but writing a good one, robust to fragmentation for instance, not so much.
Do we need that here?
We could just never release such objects to the global pool and keep their free list separated.
By that I mean they could still be reused by objects of the same types using that separate free list, achieving the same thing as this MR.
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Jacek Caban (＠jacek) -
Rémi Bernon
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Rémi Bernon (＠rbernon)