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include: Use __atomic_exchange_n() for InterlockedExchange*() if possible.

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Signed-off-by: Zebediah Figura <z.figura12@gmail.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Zebediah Figura 2021-01-18 21:55:01 -06:00 committed by Alexandre Julliard
parent dc02bbee54
commit aabdaed102
1 changed files with 6 additions and 2 deletions
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8
include/winnt.h
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@ -7015,7 +7015,9 @@ static FORCEINLINE unsigned char InterlockedCompareExchange128( volatile __int64
static FORCEINLINE LONG WINAPI InterlockedExchange( LONG volatile *dest, LONG val )
{
LONG ret;
#if defined(__i386__) || defined(__x86_64__)
#if (__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 7))
ret = __atomic_exchange_n( dest, val, __ATOMIC_SEQ_CST );
#elif defined(__i386__) || defined(__x86_64__)
__asm__ __volatile__( "lock; xchgl %0,(%1)"
: "=r" (ret) :"r" (dest), "0" (val) : "memory" );
#else
@ -7042,7 +7044,9 @@ static FORCEINLINE LONG WINAPI InterlockedDecrement( LONG volatile *dest )
static FORCEINLINE void * WINAPI InterlockedExchangePointer( void *volatile *dest, void *val )
{
void *ret;
#ifdef __x86_64__
#if (__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 7))
ret = __atomic_exchange_n( dest, val, __ATOMIC_SEQ_CST );
#elif defined(__x86_64__)
__asm__ __volatile__( "lock; xchgq %0,(%1)" : "=r" (ret) :"r" (dest), "0" (val) : "memory" );
#elif defined(__i386__)
__asm__ __volatile__( "lock; xchgl %0,(%1)" : "=r" (ret) :"r" (dest), "0" (val) : "memory" );