[PATCH v40 0/8] 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.
-- v40: 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 the desktop shared object in NtUserSetThreadDesktop. server: Return the desktop object locator in (get|set)_thread_desktop. server: Allocate shared session object for desktops. 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 | 45 +++++++++++++++++++++++++++++++++++++++++++++ server/object.c | 13 ++++++++++++- server/object.h | 2 ++ server/protocol.def | 16 ++++++++++++++++ tools/make_requests | 1 + 7 files changed, 102 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..661e8f9d159 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; \ + shared_object_t *__obj = CONTAINING_RECORD( shared, shared_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..6605c111beb 100644 --- a/server/mapping.c +++ b/server/mapping.c @@ -225,6 +225,23 @@ static const mem_size_t granularity_mask = 0xffff; static struct addr_range ranges32; static struct addr_range ranges64;
+struct session_block +{ + struct list entry; /* entry in the session block list */ + const char *data; /* base pointer for the mmaped data */ +}; + +struct session +{ + struct list blocks; +}; + +static struct mapping *session_mapping; +static struct session session = +{ + .blocks = LIST_INIT(session.blocks), +}; + #define ROUND_SIZE(size) (((size) + page_mask) & ~page_mask)
void init_memory(void) @@ -1256,6 +1273,34 @@ 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(shared_object_t) * 512, 0x10000 ); + + return create_mapping( root, name, attr, size, SEC_COMMIT, 0, access, sd ); +} + +void set_session_mapping( struct mapping *mapping ) +{ + int unix_fd = get_unix_fd( mapping->fd ); + mem_size_t size = mapping->size; + struct session_block *block; + void *tmp; + + if (!(block = mem_alloc( sizeof(*block) ))) return; + if ((tmp = mmap( NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, unix_fd, 0 )) == MAP_FAILED) + { + free( block ); + return; + } + + block->data = tmp; + session_mapping = mapping; + list_add_tail( &session.blocks, &block->entry ); +} + 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..6a51d5390f4 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 */ +} shared_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
--- server/file.h | 3 ++ server/mapping.c | 106 ++++++++++++++++++++++++++++++++++++++++++++ server/protocol.def | 7 ++- server/user.h | 1 + server/winstation.c | 7 +++ 5 files changed, 123 insertions(+), 1 deletion(-)
diff --git a/server/file.h b/server/file.h index 661e8f9d159..abfc2f0a2ce 100644 --- a/server/file.h +++ b/server/file.h @@ -192,6 +192,9 @@ 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 const volatile void *alloc_shared_object(void); +extern void free_shared_object( const volatile void *object_shm ); + #define SHARED_WRITE_BEGIN( object_shm, type ) \ do { \ const type *__shared = (object_shm); \ diff --git a/server/mapping.c b/server/mapping.c index 6605c111beb..f77de343f4f 100644 --- a/server/mapping.c +++ b/server/mapping.c @@ -229,17 +229,30 @@ struct session_block { struct list entry; /* entry in the session block list */ const char *data; /* base pointer for the mmaped data */ + mem_size_t offset; /* offset of data in the session shared mapping */ + mem_size_t used_size; /* used size for previously allocated objects */ + mem_size_t block_size; /* total size of the block */ +}; + +struct session_object +{ + struct list entry; /* entry in the session free object list */ + mem_size_t offset; /* offset of obj in the session shared mapping */ + shared_object_t obj; /* object actually shared with the client */ };
struct session { struct list blocks; + struct list free_objects; + object_id_t last_object_id; };
static struct mapping *session_mapping; static struct session session = { .blocks = LIST_INIT(session.blocks), + .free_objects = LIST_INIT(session.free_objects), };
#define ROUND_SIZE(size) (((size) + page_mask) & ~page_mask) @@ -1297,10 +1310,103 @@ void set_session_mapping( struct mapping *mapping ) }
block->data = tmp; + block->offset = 0; + block->used_size = 0; + block->block_size = size; + session_mapping = mapping; list_add_tail( &session.blocks, &block->entry ); }
+static struct session_block *grow_session_mapping( mem_size_t needed ) +{ + mem_size_t old_size = session_mapping->size, new_size; + struct session_block *block; + int unix_fd; + void *tmp; + + new_size = max( old_size * 3 / 2, old_size + max( needed, 0x10000 ) ); + new_size = (new_size + page_mask) & ~((mem_size_t)page_mask); + assert( new_size > old_size ); + + unix_fd = get_unix_fd( session_mapping->fd ); + if (!grow_file( unix_fd, new_size )) return NULL; + + if (!(block = mem_alloc( sizeof(*block) ))) return NULL; + if ((tmp = mmap( NULL, new_size - old_size, PROT_READ | PROT_WRITE, MAP_SHARED, unix_fd, old_size )) == MAP_FAILED) + { + file_set_error(); + free( block ); + return NULL; + } + + block->data = tmp; + block->offset = old_size; + block->used_size = 0; + block->block_size = new_size - old_size; + + session_mapping->size = new_size; + list_add_tail( &session.blocks, &block->entry ); + + return block; +} + +static struct session_block *find_free_session_block( mem_size_t size ) +{ + struct session_block *block; + + LIST_FOR_EACH_ENTRY( block, &session.blocks, struct session_block, entry ) + if (size < block->block_size && block->used_size < block->block_size - size) return block; + + return grow_session_mapping( size ); +} + +const volatile void *alloc_shared_object(void) +{ + struct session_object *object; + struct list *ptr; + + if ((ptr = list_head( &session.free_objects ))) + { + object = CONTAINING_RECORD( ptr, struct session_object, entry ); + list_remove( &object->entry ); + } + else + { + mem_size_t size = sizeof(*object); + struct session_block *block; + + if (!(block = find_free_session_block( size ))) return NULL; + object = (struct session_object *)(block->data + block->used_size); + object->offset = (char *)&object->obj - block->data; + block->used_size += size; + } + + SHARED_WRITE_BEGIN( &object->obj.shm, object_shm_t ) + { + /* mark the object data as uninitialized */ + mark_block_uninitialized( (void *)shared, sizeof(*shared) ); + CONTAINING_RECORD( shared, shared_object_t, shm )->id = ++session.last_object_id; + } + SHARED_WRITE_END; + + return &object->obj.shm; +} + +void free_shared_object( const volatile void *object_shm ) +{ + struct session_object *object = CONTAINING_RECORD( object_shm, struct session_object, obj.shm ); + + SHARED_WRITE_BEGIN( &object->obj.shm, object_shm_t ) + { + mark_block_noaccess( (void *)shared, sizeof(*shared) ); + CONTAINING_RECORD( shared, shared_object_t, shm )->id = 0; + } + SHARED_WRITE_END; + + list_add_tail( &session.free_objects, &object->entry ); +} + 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 6a51d5390f4..09260e071f8 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..27c58e355eb 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 */ + const desktop_shm_t *shared; /* desktop session shared memory */ };
/* user handles functions */ diff --git a/server/winstation.c b/server/winstation.c index 80126ad5d60..3b7e86feddc 100644 --- a/server/winstation.c +++ b/server/winstation.c @@ -297,6 +297,12 @@ 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 ); + + if (!(desktop->shared = alloc_shared_object())) + { + release_object( desktop ); + return NULL; + } } else { @@ -366,6 +372,7 @@ 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 ); + if (desktop->shared) free_shared_object( desktop->shared ); }
/* 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 | 11 ++++++++++- server/trace.c | 8 ++++++++ server/winstation.c | 14 ++++++++++++++ tools/make_requests | 1 + 6 files changed, 41 insertions(+), 1 deletion(-)
diff --git a/server/file.h b/server/file.h index abfc2f0a2ce..89f91c52993 100644 --- a/server/file.h +++ b/server/file.h @@ -194,6 +194,7 @@ extern void set_session_mapping( struct mapping *mapping );
extern const volatile void *alloc_shared_object(void); extern void free_shared_object( const volatile void *object_shm ); +extern obj_locator_t get_shared_object_locator( const volatile void *object_shm );
#define SHARED_WRITE_BEGIN( object_shm, type ) \ do { \ diff --git a/server/mapping.c b/server/mapping.c index f77de343f4f..92eb0c9f076 100644 --- a/server/mapping.c +++ b/server/mapping.c @@ -1407,6 +1407,13 @@ void free_shared_object( const volatile void *object_shm ) list_add_tail( &session.free_objects, &object->entry ); }
+obj_locator_t get_shared_object_locator( const volatile void *object_shm ) +{ + struct session_object *object = CONTAINING_RECORD( object_shm, struct session_object, obj.shm ); + obj_locator_t locator = {.offset = object->offset, .id = object->obj.id}; + return locator; +} + 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 09260e071f8..9a452416f0a 100644 --- a/server/protocol.def +++ b/server/protocol.def @@ -908,6 +908,12 @@ typedef volatile struct object_shm_t shm; /* object shared data */ } shared_object_t;
+typedef struct +{ + object_id_t id; /* object unique id, object data is valid if != 0 */ + mem_size_t offset; /* offset of the object in session shared memory */ +} obj_locator_t; + /****************************************************************/ /* Request declarations */
@@ -2819,13 +2825,16 @@ 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
/* Set the thread current desktop */ @REQ(set_thread_desktop) obj_handle_t handle; /* handle to the desktop */ +@REPLY + obj_locator_t locator; /* locator for the shared session object */ @END
diff --git a/server/trace.c b/server/trace.c index d76d13152aa..c9d120adecf 100644 --- a/server/trace.c +++ b/server/trace.c @@ -467,6 +467,14 @@ 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 ); + dump_uint64( ",offset=", &locator->offset ); + fprintf( stderr, "}" ); +} + 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 3b7e86feddc..43231238fad 100644 --- a/server/winstation.c +++ b/server/winstation.c @@ -740,10 +740,21 @@ 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 + { + if (desktop->shared) reply->locator = get_shared_object_locator( desktop->shared ); + release_object( desktop ); + } + release_object( thread ); }
@@ -754,6 +765,8 @@ DECL_HANDLER(set_thread_desktop) struct desktop *old_desktop, *new_desktop; struct winstation *winstation;
+ reply->locator.id = 0; + if (!(winstation = get_process_winstation( current->process, 0 /* FIXME: access rights? */ ))) return;
@@ -786,6 +799,7 @@ DECL_HANDLER(set_thread_desktop) if (old_desktop) remove_desktop_thread( old_desktop, current ); add_desktop_thread( new_desktop, current ); } + reply->locator = get_shared_object_locator( new_desktop->shared ); }
if (!current->process->desktop) 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 | 8 ++ dlls/win32u/winstation.c | 150 ++++++++++++++++++++++++++++++++++- 4 files changed, 158 insertions(+), 2 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..9815e31b899 100644 --- a/dlls/win32u/win32u_private.h +++ b/dlls/win32u/win32u_private.h @@ -194,6 +194,14 @@ extern void user_check_not_lock(void); extern BOOL get_vulkan_uuid_from_luid( const LUID *luid, GUID *uuid );
/* winstation.c */ + +struct object_lock +{ + UINT64 id; + UINT64 seq; +}; +#define OBJECT_LOCK_INIT {0} + extern BOOL is_virtual_desktop(void);
/* window.c */ diff --git a/dlls/win32u/winstation.c b/dlls/win32u/winstation.c index 3e71218200a..f5791f84ba6 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 +45,145 @@ WINE_DECLARE_DEBUG_CHANNEL(win);
#define DESKTOP_ALL_ACCESS 0x01ff
+struct session_thread_data +{ + const shared_object_t *shared_desktop; /* thread desktop shared session cached object */ +}; + +struct session_block +{ + struct list entry; /* entry in the session block list */ + const char *data; /* base pointer for the mmaped data */ + SIZE_T offset; /* offset of data in the session shared mapping */ + SIZE_T size; /* size of the mmaped data */ +}; + +static pthread_mutex_t session_lock = PTHREAD_MUTEX_INITIALIZER; +static struct list session_blocks = LIST_INIT(session_blocks); + +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 shared_object_acquire_seqlock( const shared_object_t *object, UINT64 *seq ) +{ + while ((*seq = ReadNoFence64( &object->seq )) & 1) YieldProcessor(); + __SHARED_READ_FENCE; +} + +static BOOL shared_object_release_seqlock( const shared_object_t *object, UINT64 seq ) +{ + __SHARED_READ_FENCE; + return ReadNoFence64( &object->seq ) == seq; +} + +static object_id_t shared_object_get_id( const shared_object_t *object ) +{ + struct object_lock lock = OBJECT_LOCK_INIT; + do + { + shared_object_acquire_seqlock( object, &lock.seq ); + lock.id = object->id; + } while (!shared_object_release_seqlock( object, lock.seq )); + return lock.id; +} + +static NTSTATUS map_shared_session_block( SIZE_T offset, SIZE_T size, struct session_block **ret ) +{ + 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 ); + LARGE_INTEGER off = {.QuadPart = offset & ~(PAGE_SIZE - 1)}; + struct session_block *block; + OBJECT_ATTRIBUTES attr; + unsigned int status; + HANDLE handle; + + assert( offset + size > offset ); + + if (!(block = calloc( 1, sizeof(*block) ))) return STATUS_NO_MEMORY; + + InitializeObjectAttributes( &attr, &name, 0, NULL, NULL ); + if ((status = NtOpenSection( &handle, SECTION_MAP_READ, &attr ))) + WARN( "Failed to open shared session section, status %#x\n", status ); + else + { + if ((status = NtMapViewOfSection( handle, GetCurrentProcess(), (void **)&block->data, 0, 0, + &off, &block->size, ViewUnmap, 0, PAGE_READONLY ))) + WARN( "Failed to map shared session block, status %#x\n", status ); + else + { + list_add_tail( &session_blocks, &block->entry ); + block->offset = off.QuadPart; + assert( block->offset + block->size > block->offset ); + } + NtClose( handle ); + } + + if (status) free( block ); + else *ret = block; + return status; +} + +static NTSTATUS find_shared_session_block( SIZE_T offset, SIZE_T size, struct session_block **ret ) +{ + struct session_block *block; + UINT status; + + assert( offset + size > offset ); + + pthread_mutex_lock( &session_lock ); + + LIST_FOR_EACH_ENTRY( block, &session_blocks, struct session_block, entry ) + { + if (block->offset < offset && offset + size <= block->offset + block->size) + { + *ret = block; + pthread_mutex_unlock( &session_lock ); + return STATUS_SUCCESS; + } + } + + if ((status = map_shared_session_block( offset, size, ret ))) + { + WARN( "Failed to map session block for offset %s, size %s, status %#x\n", + wine_dbgstr_longlong(offset), wine_dbgstr_longlong(size), status ); + } + + pthread_mutex_unlock( &session_lock ); + + return status; +} + +static const shared_object_t *find_shared_session_object( obj_locator_t locator ) +{ + const shared_object_t *object; + struct session_block *block; + NTSTATUS status; + + if (locator.id && !(status = find_shared_session_block( locator.offset, sizeof(*object), &block ))) + { + object = (const shared_object_t *)(block->data + locator.offset - block->offset); + if (locator.id == shared_object_get_id( object )) return object; + WARN( "Session object id doesn't match expected id %s\n", wine_dbgstr_longlong(locator.id) ); + } + + return NULL; +} + BOOL is_virtual_desktop(void) { HANDLE desktop = NtUserGetThreadDesktop( GetCurrentThreadId() ); @@ -249,11 +393,12 @@ HDESK WINAPI NtUserGetThreadDesktop( DWORD thread ) BOOL WINAPI NtUserSetThreadDesktop( HDESK handle ) { BOOL ret, was_virtual_desktop = is_virtual_desktop(); + obj_locator_t locator = {0};
SERVER_START_REQ( set_thread_desktop ) { req->handle = wine_server_obj_handle( handle ); - ret = !wine_server_call_err( req ); + if ((ret = !wine_server_call_err( req ))) locator = reply->locator; } SERVER_END_REQ;
@@ -261,6 +406,7 @@ 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; + get_session_thread_data()->shared_desktop = find_shared_session_object( locator ); thread_info->client_info.top_window = 0; thread_info->client_info.msg_window = 0; if (key_state_info) key_state_info->time = 0;
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 | 7 ++++ 4 files changed, 62 insertions(+), 33 deletions(-)
diff --git a/server/protocol.def b/server/protocol.def index 9a452416f0a..be089073e6d 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..bfa451cad06 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 = desktop->shared; 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 = desktop->shared; 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 = desktop->shared;
- *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 = desktop->shared; 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 = desktop->shared; 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 = desktop->shared; 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 = desktop->shared; 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 = desktop->shared; 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 = desktop->shared;
- 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 = desktop->shared; 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 27c58e355eb..863e4de8100 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 43231238fad..71a57be0bb7 100644 --- a/server/winstation.c +++ b/server/winstation.c @@ -303,6 +303,13 @@ static struct desktop *create_desktop( const struct unicode_str *name, unsigned release_object( desktop ); return NULL; } + + SHARED_WRITE_BEGIN( desktop->shared, 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 be089073e6d..99d5bcd02ea 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 bfa451cad06..3fcda838ecd 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 = desktop->shared; 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 863e4de8100..8a1cd327b1b 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 71a57be0bb7..695193952ae 100644 --- a/server/winstation.c +++ b/server/winstation.c @@ -308,6 +308,7 @@ 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/win32u_private.h | 8 ++++++++ dlls/win32u/winstation.c | 34 ++++++++++++++++++++++++++++++++++ 3 files changed, 51 insertions(+), 9 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/win32u_private.h b/dlls/win32u/win32u_private.h index 9815e31b899..94078281faa 100644 --- a/dlls/win32u/win32u_private.h +++ b/dlls/win32u/win32u_private.h @@ -202,6 +202,14 @@ struct object_lock }; #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 f5791f84ba6..2d553398257 100644 --- a/dlls/win32u/winstation.c +++ b/dlls/win32u/winstation.c @@ -184,6 +184,40 @@ static const shared_object_t *find_shared_session_object( obj_locator_t locator return NULL; }
+NTSTATUS get_shared_desktop( struct object_lock *lock, const desktop_shm_t **desktop_shm ) +{ + struct session_thread_data *data = get_session_thread_data(); + const shared_object_t *object; + + TRACE( "lock %p, desktop_shm %p\n", lock, desktop_shm ); + + if (!(object = data->shared_desktop)) + { + obj_locator_t locator = {0}; + + SERVER_START_REQ( get_thread_desktop ) + { + req->tid = GetCurrentThreadId(); + if (!wine_server_call_err( req )) locator = reply->locator; + } + SERVER_END_REQ; + + data->shared_desktop = find_shared_session_object( locator ); + if (!(object = data->shared_desktop)) return STATUS_INVALID_HANDLE; + memset( lock, 0, sizeof(*lock) ); + } + + if (!lock->id || !shared_object_release_seqlock( object, lock->seq )) + { + shared_object_acquire_seqlock( object, &lock->seq ); + *desktop_shm = &object->shm.desktop; + lock->id = object->id; + return STATUS_PENDING; + } + + return STATUS_SUCCESS; +} + BOOL is_virtual_desktop(void) { HANDLE desktop = NtUserGetThreadDesktop( GetCurrentThreadId() );
Another update, adding get_thread_desktop call for cases where the cache wasn't initialized.
I imagine that the lock function could be simplified to something like:
I think that's insufficient for things that require id validation, while being overkill for things that never deallocates (and hence does *not* require id validation).
For example, the suggested code (especially `validate_lock_object`) assumes that `object->id` does not change. This doesn't hold for objects that do require id validation, since the lock/unlock can race against the server freeing (and then replacing) the object at any time.
I agree it's a good idea to consolidate object type-specific logic to the end consumer side (instead of branching on type internally), but I'm afraid the suggested code doesn't look correct as-is.
And it doesn't work because `NtUserSetThreadDesktop` is not always called but threads still have an implicit desktop nonetheless.
OK, so we need the validation here after all. I still believe that it may be structured better.
For example, the suggested code (especially `validate_lock_object`) assumes that `object->id` does not change.
Right, it should validate against the cached id instead.
OK, so we need the validation here after all. I still believe that it may be structured better.
Latest revision of the MR has something simpler, that should be enough for now, as desktop objects are never invalidated, and will always outlive their threads.
On Fri May 17 08:36:29 2024 +0000, Rémi Bernon wrote:
OK, so we need the validation here after all. I still believe that it
may be structured better. Latest revision of the MR has something simpler, that should be enough for now, as desktop objects are never invalidated, and will always outlive their threads.
That looks better to me, thanks.
This merge request was approved by Jacek Caban.
Seems like this one was reverted to use the `_err` variant:
```suggestion:-0+0 if (!wine_server_call( req )) locator = reply->locator; ```
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Jacek Caban (＠jacek) -
Jinoh Kang (＠iamahuman)
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Rémi Bernon
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Rémi Bernon (＠rbernon)