From c30b65a0ea3495e8cba753ea19a53b3bab4f0ebb Mon Sep 17 00:00:00 2001
From: Anthony Williams <anthony.ajw@gmail.com>
Date: Tue, 26 Sep 2006 16:31:41 +0000
Subject: [PATCH] Added #ifdef _WIN64 around a direct call to
 InterlockedCompareExchange rather than the existing call through ice_wrapper.
 The platform SDK library for Win64 doesn't include a library version of
 InterlockedCompareExchange which the ice_wrapper code requires.

[SVN r35340]
---
 src/once.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/once.cpp b/src/once.cpp
index 4332f49a..bbbfae60 100644
--- a/src/once.cpp
+++ b/src/once.cpp
@@ -113,7 +113,11 @@ inline LONG ice_wrapper(LPVOID (__stdcall *ice)(LPVOID*, LPVOID, LPVOID),
 // according to the above function type wrappers.
 inline LONG compare_exchange(volatile LPLONG dest, LONG exch, LONG cmp)
 {
+#ifdef _WIN64
+    return InterlockedCompareExchange(dest, exch, cmp);
+#else
     return ice_wrapper(&InterlockedCompareExchange, dest, exch, cmp);
+#endif
 }
 }
 #endif