From 8f3e46f67e461f15f7060e1305773ed42f3ce67c Mon Sep 17 00:00:00 2001
From: Matt Pharr <matt.pharr@intel.com>
Date: Thu, 29 Sep 2011 16:19:59 -0700
Subject: [PATCH] Use InterlockedExchangeAdd on Windows

---
 examples/taskinfo.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/examples/taskinfo.h b/examples/taskinfo.h
index 4806bdaa..2a5daaf4 100644
--- a/examples/taskinfo.h
+++ b/examples/taskinfo.h
@@ -146,7 +146,7 @@ lInitTaskInfo() {
 static inline TaskInfo *
 lGetTaskInfo() {
 #ifdef ISPC_IS_WINDOWS
-    int myCoord = InterlockedAdd(&nextTaskInfoCoordinate, 1)-1;
+    int myCoord = InterlockedExchangeAdd(&nextTaskInfoCoordinate, 1);
 #else
     int myCoord = lAtomicAdd32(&nextTaskInfoCoordinate, 1);
 #endif