hal: Implement ExTryToAcquireFastMutex().

Signed-off-by: Zebediah Figura <z.figura12@gmail.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>

hal: Implement ExTryToAcquireFastMutex().
ec5edb4f · Zebediah Figura · Alexandre Julliard · 3d5b2a0d · ec5edb4f
Commit ec5edb4f authored Jan 29, 2019 by Zebediah Figura Committed by Alexandre Julliard Jan 30, 2019
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hal.c dlls/hal/hal.c +4 -3

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--- a/dlls/hal/hal.c
+++ b/dlls/hal/hal.c
@@ -81,10 +81,11 @@ void WINAPI DECLSPEC_HIDDEN __regs_ExReleaseFastMutex( FAST_MUTEX *mutex )
 }

 DEFINE_FASTCALL1_ENTRYPOINT( ExTryToAcquireFastMutex )
-BOOLEAN WINAPI DECLSPEC_HIDDEN __regs_ExTryToAcquireFastMutex(PFAST_MUTEX FastMutex)
+BOOLEAN WINAPI DECLSPEC_HIDDEN __regs_ExTryToAcquireFastMutex( FAST_MUTEX *mutex )
 {
-    FIXME("(%p) stub\n", FastMutex);
-    return TRUE;
+    TRACE("mutex %p.\n", mutex);
+
+    return (InterlockedCompareExchange( &mutex->Count, 0, 1 ) == 1);
 }

 DEFINE_FASTCALL1_ENTRYPOINT( KfAcquireSpinLock )