msvcr100: Use InterlockedDecrement in SpinWait::_SpinOnce.

Signed-off-by: Piotr Caban <piotr@codeweavers.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>

msvcr100: Use InterlockedDecrement in SpinWait::_SpinOnce.
a6bfecd4 · Piotr Caban · Alexandre Julliard · 26d30c63 · a6bfecd4
Commit a6bfecd4 authored Feb 28, 2017 by Piotr Caban Committed by Alexandre Julliard Feb 28, 2017
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lock.c dlls/msvcrt/lock.c +1 -7

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--- a/dlls/msvcrt/lock.c
+++ b/dlls/msvcrt/lock.c
@@ -265,13 +265,7 @@ MSVCRT_bool __thiscall SpinWait__SpinOnce(SpinWait *this)
        SpinWait__Reset(this);
        /* fall through */
    case SPINWAIT_SPIN:
-#ifdef __i386__
-        __asm__ __volatile__( "rep;nop" : : : "memory" );
-#else
-        __asm__ __volatile__( "" : : : "memory" );
-#endif
-
-        this->spin--;
+        InterlockedDecrement((LONG*)&this->spin);
        if(!this->spin)
            this->state = this->unknown ? SPINWAIT_YIELD : SPINWAIT_DONE;
        return TRUE;