From 252b3b918a398c5225cc75cd1a67d9cf7dd3903b Mon Sep 17 00:00:00 2001
From: inmarket <inmarket@ugfx.org>
Date: Sat, 1 Apr 2017 13:21:38 +1000
Subject: [PATCH] Prevent GWIN drawing while deleting a window from the list

---
 src/gwin/gwin_wm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/gwin/gwin_wm.c b/src/gwin/gwin_wm.c
index c0ea8d25..0c4fd1bf 100644
--- a/src/gwin/gwin_wm.c
+++ b/src/gwin/gwin_wm.c
@@ -742,7 +742,9 @@ static bool_t WM_Add(GHandle gh, const GWindowInit *pInit) {
 
 static void WM_Delete(GHandle gh) {
 	// Remove it from the window list
+	gfxSemWait(&gwinsem, TIME_INFINITE);
 	gfxQueueASyncRemove(&_GWINList, &gh->wmq);
+	gfxSemSignal(&gwinsem);
 }
 
 static void WM_Redraw(GHandle gh) {