* BWindowScreens had no sychronization mechanism whatsoever - since the

workspace activation message was asynchronous, whether or not the
  BWindowScreen stopped drawing in time was pure luck (this also caused crashes
  with the VESA driver, as that one unmaps its frame buffer during mode switch).
  Introduced a new AS_DIRECT_SCREEN_LOCK protocol for this.
* In the long term, we should let BWindowScreen use the same mechanism as
  BDirectWindows, though.
* Removed superfluous locking in BDirectWindow::_InitData().


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@32746 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/os/game/WindowScreen.h

@@ -72,7 +72,7 @@ class BWindowScreen : public BWindow {
 		virtual void		_ReservedWindowScreen3();
 		virtual void		_ReservedWindowScreen4();
 
-		// not implemented:		
+		// not implemented:
 							BWindowScreen();
 							BWindowScreen(BWindowScreen& other);
 							BWindowScreen &operator=(BWindowScreen& other);
@@ -80,6 +80,7 @@ class BWindowScreen : public BWindow {
 		status_t			_InitData(uint32 space, uint32 attributes);
 		void				_DisposeData();
 
+		status_t			_LockScreen(bool lock);
 		status_t			_Activate();
 		status_t			_Deactivate();
 
@@ -103,7 +104,6 @@ class BWindowScreen : public BWindow {
 
 		display_mode*		fOriginalDisplayMode;
 		display_mode*		fDisplayMode;
-		sem_id				fActivateSem;
 		sem_id				fDebugSem;
 		image_id			fAddonImage;
 		uint32				fAttributes;
@@ -126,7 +126,7 @@ class BWindowScreen : public BWindow {
 		GetAccelerantHook	fGetAccelerantHook;
 		wait_engine_idle	fWaitEngineIdle;
 
-		uint32				_reserved[162];
+		uint32				_reserved[163];
 };
 
 #endif	// _WINDOW_SCREEN_H