From cb19fb10a23166457f218cfe86ce6bb0eb96643e Mon Sep 17 00:00:00 2001
From: kevin <kevin@sunbeam>
Date: Wed, 16 Oct 2013 08:58:46 -0700
Subject: [PATCH] cmThread.c : Changed cmThPtrCAS() to select the CAS system
 call based on OS_64 when compiling under OSX.  This allows backward
 compatibility with older version of OSX.

---
 cmThread.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/cmThread.c b/cmThread.c
index 17d1b89..18c5f0b 100644
--- a/cmThread.c
+++ b/cmThread.c
@@ -1302,7 +1302,11 @@ bool     cmThPtrCAS(   void*    addr, void*    old, void*    neww )
     union 
     {
       void* addr;
+#ifdef OS_64
       int64_t   val;
+#else
+      int val;
+#endif
     } u;
   } s_t;
 
@@ -1310,10 +1314,11 @@ bool     cmThPtrCAS(   void*    addr, void*    old, void*    neww )
   
   ov.u.addr = old;
   nv.u.addr = neww;
-
+#ifdef OS_64
   int rv = OSAtomicCompareAndSwap64Barrier(ov.u.val,nv.u.val,(int64_t*)addr);
-  
-  //int rv = OSAtomicCompareAndSwapPtrBarrier(old,neww,&addr);
+#else
+  int rv = OSAtomicCompareAndSwap32Barrier(ov.u.val,nv.u.val,(int*)addr);
+#endif
   return rv;
 #endif