[client,sdl] use CriticalSectionLock

use c++ RAII to lock critical sections

client/SDL/sdl_freerdp.cpp

@@ -406,9 +406,9 @@ static BOOL sdl_end_paint(rdpContext* context)
 	auto sdl = reinterpret_cast<sdlContext*>(context);
 	WINPR_ASSERT(sdl);
 
-	EnterCriticalSection(&sdl->critical);
+	CriticalSectionLock lock(sdl->critical);
 	const BOOL rc = sdl_push_user_event(SDL_USEREVENT_UPDATE, context);
-	LeaveCriticalSection(&sdl->critical);
+
 	return rc;
 }
 
@@ -638,17 +638,10 @@ fail:
 
 static BOOL sdl_wait_create_windows(sdlContext* sdl)
 {
-	BOOL res = FALSE;
-	EnterCriticalSection(&sdl->critical);
-	res = ResetEvent(sdl->windows_created);
-	if (!res)
-		goto unlock;
-	res = sdl_push_user_event(SDL_USEREVENT_CREATE_WINDOWS, sdl);
-	if (!res)
-		goto unlock;
-unlock:
-	LeaveCriticalSection(&sdl->critical);
-	if (!res)
+	CriticalSectionLock lock(sdl->critical);
+	if (!ResetEvent(sdl->windows_created))
+		return FALSE;
+	if (!sdl_push_user_event(SDL_USEREVENT_CREATE_WINDOWS, sdl))
 		return FALSE;
 
 	HANDLE handles[] = { sdl->initialized, freerdp_abort_event(&sdl->common.context) };
@@ -692,7 +685,7 @@ static int sdl_run(sdlContext* sdl)
 			SDL_Log("got event %s [0x%08" PRIx32 "]", sdl_event_type_str(windowEvent.type),
 			        windowEvent.type);
 #endif
-			EnterCriticalSection(&sdl->critical);
+			CriticalSectionLock lock(sdl->critical);
 			switch (windowEvent.type)
 			{
 				case SDL_QUIT:
@@ -838,7 +831,6 @@ static int sdl_run(sdlContext* sdl)
 				default:
 					break;
 			}
-			LeaveCriticalSection(&sdl->critical);
 		}
 	}
 

client/SDL/sdl_utils.cpp

@@ -178,7 +178,7 @@ BOOL update_fullscreen(sdlContext* sdl, BOOL enter)
 {
 	WINPR_ASSERT(sdl);
 
-	EnterCriticalSection(&sdl->critical);
+	CriticalSectionLock lock(sdl->critical);
 	for (uint32_t x = 0; x < sdl->windowCount; x++)
 	{
 		sdl_window_t* window = &sdl->windows[x];
@@ -186,7 +186,6 @@ BOOL update_fullscreen(sdlContext* sdl, BOOL enter)
 			return FALSE;
 	}
 	sdl->fullscreen = enter;
-	LeaveCriticalSection(&sdl->critical);
 	return TRUE;
 }
 
@@ -194,7 +193,7 @@ BOOL update_resizeable(sdlContext* sdl, BOOL enable)
 {
 	WINPR_ASSERT(sdl);
 
-	EnterCriticalSection(&sdl->critical);
+	CriticalSectionLock lock(sdl->critical);
 
 	const rdpSettings* settings = sdl->common.context.settings;
 	const BOOL dyn = freerdp_settings_get_bool(settings, FreeRDP_DynamicResolutionUpdate);
@@ -209,6 +208,5 @@ BOOL update_resizeable(sdlContext* sdl, BOOL enable)
 	}
 	sdl->resizeable = use;
 
-	LeaveCriticalSection(&sdl->critical);
 	return TRUE;
 }

client/SDL/sdl_utils.hpp

@@ -26,6 +26,22 @@
 
 #include "sdl_freerdp.hpp"
 
+class CriticalSectionLock
+{
+  public:
+	CriticalSectionLock(CRITICAL_SECTION& section) : _section(section)
+	{
+		EnterCriticalSection(&_section);
+	}
+	~CriticalSectionLock()
+	{
+		LeaveCriticalSection(&_section);
+	}
+
+  private:
+	CRITICAL_SECTION _section;
+};
+
 enum
 {
 	SDL_USEREVENT_UPDATE = SDL_USEREVENT + 1,