win32u: Move window surfaces list from user32.

Signed-off-by: Jacek Caban <jacek@codeweavers.com>
Signed-off-by: Huw Davies <huw@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>

dlls/user32/win.c

@@ -41,16 +41,6 @@ WINE_DEFAULT_DEBUG_CHANNEL(win);
 
 static DWORD process_layout = ~0u;
 
-static struct list window_surfaces = LIST_INIT( window_surfaces );
-
-static CRITICAL_SECTION surfaces_section;
-static CRITICAL_SECTION_DEBUG critsect_debug =
-{
-    0, 0, &surfaces_section,
-    { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
-      0, 0, { (DWORD_PTR)(__FILE__ ": surfaces_section") }
-};
-static CRITICAL_SECTION surfaces_section = { &critsect_debug, -1, 0, 0, 0, 0 };
 
 /**********************************************************************/
 
@@ -730,11 +720,9 @@ void create_offscreen_window_surface( const RECT *visible_rect, struct window_su
  */
 void register_window_surface( struct window_surface *old, struct window_surface *new )
 {
-    if (old == new) return;
-    EnterCriticalSection( &surfaces_section );
-    if (old && old != &dummy_surface) list_remove( &old->entry );
-    if (new && new != &dummy_surface) list_add_tail( &window_surfaces, &new->entry );
-    LeaveCriticalSection( &surfaces_section );
+    if (old == &dummy_surface) old = NULL;
+    if (new == &dummy_surface) new = NULL;
+    NtUserCallTwoParam( (UINT_PTR)old, (UINT_PTR)new, NtUserRegisterWindowSurface );
 }
 
 
@@ -745,20 +733,7 @@ void register_window_surface( struct window_surface *old, struct window_surface
  */
 void flush_window_surfaces( BOOL idle )
 {
-    static DWORD last_idle;
-    DWORD now;
-    struct window_surface *surface;
-
-    EnterCriticalSection( &surfaces_section );
-    now = GetTickCount();
-    if (idle) last_idle = now;
-    /* if not idle, we only flush if there's evidence that the app never goes idle */
-    else if ((int)(now - last_idle) < 50) goto done;
-
-    LIST_FOR_EACH_ENTRY( surface, &window_surfaces, struct window_surface, entry )
-        surface->funcs->flush( surface );
-done:
-    LeaveCriticalSection( &surfaces_section );
+    NtUserCallOneParam( idle, NtUserFlushWindowSurfaces );
 }
 
 

dlls/win32u/sysparams.c

@@ -4504,10 +4504,14 @@ ULONG_PTR WINAPI NtUserCallOneParam( ULONG_PTR arg, ULONG code )
         return HandleToUlong( get_sys_color_pen(arg) );
     case NtUserGetSystemMetrics:
         return get_system_metrics( arg );
-    case NtUserGetDeskPattern:
-        return get_entry( &entry_DESKPATTERN, 256, (WCHAR *)arg );
     case NtUserMessageBeep:
         return message_beep( arg );
+    /* temporary exports */
+    case NtUserFlushWindowSurfaces:
+        flush_window_surfaces( arg );
+        return 0;
+    case NtUserGetDeskPattern:
+        return get_entry( &entry_DESKPATTERN, 256, (WCHAR *)arg );
     default:
         FIXME( "invalid code %u\n", code );
         return 0;
@@ -4529,6 +4533,10 @@ ULONG_PTR WINAPI NtUserCallTwoParam( ULONG_PTR arg1, ULONG_PTR arg2, ULONG code
         return mirror_window_region( UlongToHandle(arg1), UlongToHandle(arg2) );
     case NtUserMonitorFromRect:
         return HandleToUlong( monitor_from_rect( (const RECT *)arg1, arg2, get_thread_dpi() ));
+    /* temporary exports */
+    case NtUserRegisterWindowSurface:
+        register_window_surface( (struct window_surface *)arg1, (struct window_surface *)arg2 );
+        return 0;
     default:
         FIXME( "invalid code %u\n", code );
         return 0;

dlls/win32u/win32u_private.h

@@ -260,6 +260,11 @@ extern RECT map_dpi_rect( RECT rect, UINT dpi_from, UINT dpi_to ) DECLSPEC_HIDDE
 extern HMONITOR monitor_from_point( POINT pt, DWORD flags, UINT dpi ) DECLSPEC_HIDDEN;
 extern HMONITOR monitor_from_rect( const RECT *rect, DWORD flags, UINT dpi ) DECLSPEC_HIDDEN;
 
+/* window.c */
+extern void flush_window_surfaces( BOOL idle ) DECLSPEC_HIDDEN;
+extern void register_window_surface( struct window_surface *old,
+                                     struct window_surface *new ) DECLSPEC_HIDDEN;
+
 extern void wrappers_init( unixlib_handle_t handle ) DECLSPEC_HIDDEN;
 extern NTSTATUS gdi_init(void) DECLSPEC_HIDDEN;
 extern NTSTATUS callbacks_init( void *args ) DECLSPEC_HIDDEN;

dlls/win32u/window.c

@@ -23,11 +23,52 @@
 #pragma makedep unix
 #endif
 
+#include <pthread.h>
+
 #include "ntstatus.h"
 #define WIN32_NO_STATUS
 #include "win32u_private.h"
 #include "wine/server.h"
 
+static struct list window_surfaces = LIST_INIT( window_surfaces );
+static pthread_mutex_t surfaces_lock = PTHREAD_MUTEX_INITIALIZER;
+
+/*******************************************************************
+ *           register_window_surface
+ *
+ * Register a window surface in the global list, possibly replacing another one.
+ */
+void register_window_surface( struct window_surface *old, struct window_surface *new )
+{
+    if (old == new) return;
+    pthread_mutex_lock( &surfaces_lock );
+    if (old) list_remove( &old->entry );
+    if (new) list_add_tail( &window_surfaces, &new->entry );
+    pthread_mutex_unlock( &surfaces_lock );
+}
+
+/*******************************************************************
+ *           flush_window_surfaces
+ *
+ * Flush pending output from all window surfaces.
+ */
+void flush_window_surfaces( BOOL idle )
+{
+    static DWORD last_idle;
+    DWORD now;
+    struct window_surface *surface;
+
+    pthread_mutex_lock( &surfaces_lock );
+    now = NtGetTickCount();
+    if (idle) last_idle = now;
+    /* if not idle, we only flush if there's evidence that the app never goes idle */
+    else if ((int)(now - last_idle) < 50) goto done;
+
+    LIST_FOR_EACH_ENTRY( surface, &window_surfaces, struct window_surface, entry )
+        surface->funcs->flush( surface );
+done:
+    pthread_mutex_unlock( &surfaces_lock );
+}
 
 /***********************************************************************
  *           NtUserGetProp   (win32u.@)

include/ntuser.h

@@ -61,6 +61,7 @@ enum
     NtUserMessageBeep,
     NtUserRealizePalette,
     /* temporary exports */
+    NtUserFlushWindowSurfaces,
     NtUserGetDeskPattern,
 };
 
@@ -71,6 +72,8 @@ enum
     NtUserGetSystemMetricsForDpi,
     NtUserMirrorRgn,
     NtUserMonitorFromRect,
+    /* temporary exports */
+    NtUserRegisterWindowSurface,
 };
 
 /* color index used to retrieve system 55aa brush */