From d0110ebfd26a76d85d465b2cbc2332359dcf55e0 Mon Sep 17 00:00:00 2001
From: Pixel <pixel@nobis-crew.org>
Date: Wed, 11 Nov 2009 13:40:20 -0800
Subject: Forgot cmpxchg.

---
 include/Atomic.h | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'include')

diff --git a/include/Atomic.h b/include/Atomic.h
index 0f3e8d3..35edbf1 100644
--- a/include/Atomic.h
+++ b/include/Atomic.h
@@ -21,6 +21,8 @@ template <class T> T Increment(volatile T * ptr, T delta = 1) { __sync_fetch_and
 template <class T> T Decrement(volatile T * ptr, T delta = 1) { __sync_fetch_and_sub(ptr, delta); }
 };
 
+template <class T> T CmpXChg(volatile T * ptr, T xch, T cmp) { return __sync_val_compare_and_swap(ptr, cmp, xch); }
+
 template <class T> T Exchange32(volatile T * ptr, T exchange) {
 #if defined(i386) || defined (__x86_64)
     __asm__ __volatile__("lock xchgl %0, (%1)" : "+r"(exchange) : "r"(ptr));
-- 
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