From 7761a2604a013659ae62044d7aa3c89bc66a266d Mon Sep 17 00:00:00 2001
From: Chocobo1 <Chocobo1@users.noreply.github.com>
Date: Thu, 10 Mar 2016 02:00:26 +0800
Subject: [PATCH] Use QAtomicInt to guarantee cleanup() is only executed once

---
 src/app/application.cpp | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/src/app/application.cpp b/src/app/application.cpp
index aeee2c7cd..3b1ff7b1a 100644
--- a/src/app/application.cpp
+++ b/src/app/application.cpp
@@ -33,6 +33,7 @@
 #include <QLibraryInfo>
 #include <QSysInfo>
 #include <QProcess>
+#include <QAtomicInt>
 
 #ifndef DISABLE_GUI
 #include "gui/guiiconprovider.h"
@@ -547,11 +548,9 @@ void Application::cleanup()
 #ifndef DISABLE_GUI
 #ifdef Q_OS_WIN
     // cleanup() can be called multiple times during shutdown. We only need it once.
-    static bool alreadyDone = false;
-
-    if (alreadyDone)
+    static QAtomicInt alreadyDone;
+    if (!alreadyDone.testAndSetAcquire(0, 1))
         return;
-    alreadyDone = true;
 #endif // Q_OS_WIN
 
     // Hide the window and not leave it on screen as