From a7d42e11b4e97f19eaeb3b5ee811f04adb05b13d Mon Sep 17 00:00:00 2001
From: Michal Krol <michal@vmware.com>
Date: Mon, 16 Mar 2009 13:07:22 +0100
Subject: gallium: Implement atomic interface for windows user mode subsystem.

---
 src/gallium/include/pipe/p_atomic.h | 36 +++++++++++++++++++++++++++++++++++-
 1 file changed, 35 insertions(+), 1 deletion(-)

(limited to 'src/gallium/include')

diff --git a/src/gallium/include/pipe/p_atomic.h b/src/gallium/include/pipe/p_atomic.h
index 773ae983436..13866d220e0 100644
--- a/src/gallium/include/pipe/p_atomic.h
+++ b/src/gallium/include/pipe/p_atomic.h
@@ -66,7 +66,41 @@ p_atomic_cmpxchg(struct pipe_atomic *v, int32_t old, int32_t new)
    return __sync_val_compare_and_swap(&v->count, old, new);
 }
 
-#else /* (defined(PIPE_CC_GCC)) */
+#elif (defined(PIPE_SUBSYSTEM_WINDOWS_USER)) /* (defined(PIPE_CC_GCC)) */
+
+struct pipe_atomic
+{
+   long count;
+};
+
+#define p_atomic_set(_v, _i) ((_v)->count = (_i))
+#define p_atomic_read(_v) ((_v)->count)
+
+static INLINE boolean
+p_atomic_dec_zero(struct pipe_atomic *v)
+{
+   return InterlockedDecrement(&v->count);
+}
+
+static INLINE void
+p_atomic_inc(struct pipe_atomic *v)
+{
+   InterlockedIncrement(&v->count);
+}
+
+static INLINE void
+p_atomic_dec(struct pipe_atomic *v)
+{
+   InterlockedDecrement(&v->count);
+}
+
+static INLINE int32_t
+p_atomic_cmpxchg(struct pipe_atomic *v, int32_t old, int32_t new)
+{
+   return InterlockedCompareExchange(&v->count, new, old);
+}
+
+#else /* (defined(PIPE_SUBSYSTEM_WINDOWS_USER)) */
 
 #include "pipe/p_thread.h"
 
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