Cleanup: purge the DCQ of the data it owns on the way out of the program.

git-svn-id: svn://svn.code.sf.net/p/sc2/code/trunk@3743 8092fc87-c524-0410-9efc-e669fe64eaf9

sc2/src/libs/graphics/dcqueue.c

@@ -587,3 +587,42 @@ TFB_FlushGraphics (void)
 	RenderedFrames++;
 	BroadcastCondVar (RenderingCond);
 }
+
+void
+TFB_PurgeDanglingGraphics (void)
+{
+	Lock_DCQ (-1);
+
+	for (;;)
+	{
+		TFB_DrawCommand DC;
+
+		if (!TFB_DrawCommandQueue_Pop (&DC))
+		{
+			// the Queue is now empty.
+			break;
+		}
+
+		switch (DC.Type)
+		{
+			case TFB_DRAWCOMMANDTYPE_DELETEIMAGE:
+			{
+				TFB_Image *DC_image = DC.data.deleteimage.image;
+				TFB_DrawImage_Delete (DC_image);
+				break;
+			}
+			case TFB_DRAWCOMMANDTYPE_DELETEDATA:
+			{
+				void *data = DC.data.deletedata.data;
+				HFree (data);
+				break;
+			}
+			case TFB_DRAWCOMMANDTYPE_SENDSIGNAL:
+			{
+				ClearSemaphore (DC.data.sendsignal.sem);
+				break;
+			}
+		}
+	}
+	Unlock_DCQ ();
+}

sc2/src/libs/graphics/gfx_common.h

@@ -98,6 +98,7 @@ extern float FrameRate;
 extern int FrameRateTickBase;
 
 void TFB_FlushGraphics (void); // Only call from main thread!!
+void TFB_PurgeDanglingGraphics (void); // Only call from main thread as part of shutdown.
 
 extern int ScreenWidth;
 extern int ScreenHeight;

sc2/src/uqm.c

@@ -470,6 +470,8 @@ main (int argc, char *argv[])
 		unInitAudio ();
 		uninit_communication ();
 		UninitColorMaps ();
+		// TODO: Merge into TFB_UninitGraphics when it goes live
+		TFB_PurgeDanglingGraphics ();
 		// Not yet: TFB_UninitGraphics ();
 
 #ifdef NETPLAY