From 9a19aaed5933859fb8b0ed8910a93ab96e117f51 Mon Sep 17 00:00:00 2001
From: Jeffrey Pfau <jeffrey@endrift.com>
Date: Tue, 27 Oct 2015 20:27:02 -0700
Subject: [PATCH] =?UTF-8?q?=C2=96Qt:=20Fix=20a=20race=20condition=20in=20P?=
 =?UTF-8?q?ainterGL=20that=20could=20lead=20to=20a=20crash?=
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---
 CHANGES                       | 1 +
 src/platform/qt/DisplayGL.cpp | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/CHANGES b/CHANGES
index 2eaaf13a4..5f6650c16 100644
--- a/CHANGES
+++ b/CHANGES
@@ -9,6 +9,7 @@ Bugfixes:
  - Qt: Use safer isLoaded check in GameController
  - GBA Memory: Fix DMAs from BIOS while not in BIOS
  - GBA: Fix idle skip state being retained between games
+ - Qt: Fix a race condition in PainterGL that could lead to a crash
 Misc:
  - Qt: Window size command line options are now supported
  - Qt: Increase usability of key mapper
diff --git a/src/platform/qt/DisplayGL.cpp b/src/platform/qt/DisplayGL.cpp
index 62fb91ede..59c3ad49c 100644
--- a/src/platform/qt/DisplayGL.cpp
+++ b/src/platform/qt/DisplayGL.cpp
@@ -205,7 +205,7 @@ void PainterGL::start() {
 }
 
 void PainterGL::draw() {
-	if (m_queue.isEmpty()) {
+	if (m_queue.isEmpty() || !GBAThreadIsActive(m_context)) {
 		return;
 	}
 	if (GBASyncWaitFrameStart(&m_context->sync) || !m_queue.isEmpty()) {