From 9080d5fda03d16143e2a446df72fe16d94a40c59 Mon Sep 17 00:00:00 2001
From: Chris Robinson <chris.kcat@gmail.com>
Date: Fri, 2 Sep 2011 02:57:21 -0700
Subject: Do an atomic compare-exchange on the global context when destroying a
 context

---
 Alc/ALc.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

(limited to 'Alc/ALc.c')

diff --git a/Alc/ALc.c b/Alc/ALc.c
index df2ba12c..6ce6feaa 100644
--- a/Alc/ALc.c
+++ b/Alc/ALc.c
@@ -2147,17 +2147,14 @@ ALC_API ALCvoid ALC_APIENTRY alcDestroyContext(ALCcontext *context)
     }
     UnlockDevice(Device);
 
+    if(CompExchangePtr((void**)&GlobalContext, context, NULL))
+        ALCcontext_DecRef(context);
+
     if(Device->NumContexts == 0)
     {
         ALCdevice_StopPlayback(Device);
         Device->Flags &= ~DEVICE_RUNNING;
     }
-
-    if(GlobalContext == context)
-    {
-        GlobalContext = NULL;
-        ALCcontext_DecRef(context);
-    }
     UnlockLists();
 
     ALCcontext_DecRef(context);
-- 
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