Use alertable waits in PeekMessage16 and GetMessage16 so we can

dlls/user/comm16.c

@@ -568,6 +568,7 @@ INT16 WINAPI OpenComm16(LPCSTR device,UINT16 cbInQueue,UINT16 cbOutQueue)
 			COM[port].write_ov.hEvent = CreateEventA(NULL,0,0,NULL);
 
                         comm_waitread( &COM[port] );
+			USER16_AlertableWait++;
 
 			return port;
 		}
@@ -612,6 +613,7 @@ INT16 WINAPI CloseComm16(INT16 cid)
                 UnMapLS( COM[cid].seg_unknown );
 		CloseHandle(COM[cid].read_ov.hEvent);
 		CloseHandle(COM[cid].write_ov.hEvent);
+		USER16_AlertableWait--;
 
 		/* free buffers */
 		free(ptr->outbuf);

dlls/user/msg16.c

@@ -16,6 +16,7 @@
 
 DEFAULT_DEBUG_CHANNEL(msg);
 
+DWORD USER16_AlertableWait = 0;
 
 /***********************************************************************
  *		SendMessage  (USER.111)
@@ -147,6 +148,8 @@ BOOL16 WINAPI PeekMessage32_16( MSG32_16 *msg16, HWND16 hwnd16,
     MSG msg;
     HWND hwnd = WIN_Handle32( hwnd16 );
 
+    if(USER16_AlertableWait)
+        MsgWaitForMultipleObjectsEx( 0, NULL, 1, 0, MWMO_ALERTABLE );
     if (!PeekMessageW( &msg, hwnd, first, last, flags )) return FALSE;
 
     msg16->msg.hwnd    = WIN_Handle16( msg.hwnd );
@@ -183,6 +186,8 @@ BOOL16 WINAPI GetMessage32_16( MSG32_16 *msg16, HWND16 hwnd16, UINT16 first,
 
     do
     {
+        if(USER16_AlertableWait)
+            MsgWaitForMultipleObjectsEx( 0, NULL, INFINITE, 0, MWMO_ALERTABLE );
         GetMessageW( &msg, hwnd, first, last );
         msg16->msg.hwnd    = WIN_Handle16( msg.hwnd );
         msg16->msg.lParam  = msg.lParam;

include/user.h

@@ -120,4 +120,6 @@ extern WINE_LOOK TWEAK_WineLook;
 /* gray brush cache */
 extern HBRUSH CACHE_GetPattern55AABrush(void);
 
+extern DWORD USER16_AlertableWait;
+
 #endif  /* __WINE_USER_H */