Zebediah Figura : include: Add MemoryBarrier().

[Alexandre Julliard]

Module: wine
Branch: master
Commit: a952453888fb5df3c70edf357820bc924b4f3e7f
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=a952453888fb5df3c70edf357...

Author: Zebediah Figura 
Date:   Mon Jan 18 21:55:03 2021 -0600

include: Add MemoryBarrier().

Signed-off-by: Zebediah Figura 
Signed-off-by: Alexandre Julliard

---

include/winnt.h | 50 +++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 49 insertions(+), 1 deletion(-)

diff --git a/include/winnt.h b/include/winnt.h
index 61368d43d3c..8834ced73e6 100644
--- a/include/winnt.h
+++ b/include/winnt.h
@@ -6983,7 +6983,50 @@ static FORCEINLINE void * WINAPI InterlockedExchangePointer( void *volatile *des
     return (void *)_InterlockedExchange( (long volatile*)dest, (long)val );
 }

-#endif
+#endif /* __i386__ */
+
+#ifdef __i386__
+
+static FORCEINLINE void MemoryBarrier(void)
+{
+    LONG dummy;
+    InterlockedOr(&dummy, 0);
+}
+
+#elif defined(__x86_64__)
+
+#pragma intrinsic(__faststorefence)
+
+void __faststorefence(void);
+
+static FORCEINLINE void MemoryBarrier(void)
+{
+    __faststorefence();
+}
+
+#elif defined(__arm__)
+
+#pragma intrinsic(__dmb)
+
+void __dmb(void);
+
+static FORCEINLINE void MemoryBarrier(void)
+{
+    __dmb(_ARM_BARRIER_SY);
+}
+
+#elif defined(__aarch64__)
+
+#pragma intrinsic(__dmb)
+
+void __dmb(void);
+
+static FORCEINLINE void MemoryBarrier(void)
+{
+    __dmb(_ARM64_BARRIER_SY);
+}
+
+#endif /* __i386__ */

#elif defined(__GNUC__)

@@ -7068,6 +7111,11 @@ static FORCEINLINE LONG WINAPI InterlockedOr( LONG volatile *dest, LONG val )
     return __sync_fetch_and_or( dest, val );
 }

+static FORCEINLINE void MemoryBarrier(void)
+{
+    __sync_synchronize();
+}
+
 #endif  /* __GNUC__ */

#ifdef __cplusplus