Module: wine Branch: master Commit: c0ce83371b1c45d22d584afc7407cfcf9d4063aa URL: https://source.winehq.org/git/wine.git/?a=commit;h=c0ce83371b1c45d22d584afc7...
Author: Zebediah Figura z.figura12@gmail.com Date: Wed Jan 20 22:35:49 2021 -0600
ntoskrnl: Use YieldProcessor().
Signed-off-by: Zebediah Figura z.figura12@gmail.com Signed-off-by: Alexandre Julliard julliard@winehq.org
---
dlls/ntoskrnl.exe/sync.c | 15 +++------------ 1 file changed, 3 insertions(+), 12 deletions(-)
diff --git a/dlls/ntoskrnl.exe/sync.c b/dlls/ntoskrnl.exe/sync.c index 671398594e8..2aa60a0f2a0 100644 --- a/dlls/ntoskrnl.exe/sync.c +++ b/dlls/ntoskrnl.exe/sync.c @@ -540,15 +540,6 @@ void WINAPI KeInitializeSpinLock( KSPIN_LOCK *lock ) *lock = 0; }
-static inline void small_pause(void) -{ -#ifdef __x86_64__ - __asm__ __volatile__( "rep;nop" : : : "memory" ); -#else - __asm__ __volatile__( "" : : : "memory" ); -#endif -} - /*********************************************************************** * KeAcquireSpinLockAtDpcLevel (NTOSKRNL.EXE.@) */ @@ -556,7 +547,7 @@ void WINAPI KeAcquireSpinLockAtDpcLevel( KSPIN_LOCK *lock ) { TRACE("lock %p.\n", lock); while (InterlockedCompareExchangePointer( (void **)lock, (void *)1, (void *)0 )) - small_pause(); + YieldProcessor(); }
/*********************************************************************** @@ -592,7 +583,7 @@ void FASTCALL KeAcquireInStackQueuedSpinLockAtDpcLevel( KSPIN_LOCK *lock, KLOCK_ while (!((ULONG_PTR)InterlockedCompareExchangePointer( (void **)&queue->LockQueue.Lock, 0, 0 ) & QUEUED_SPINLOCK_OWNED)) { - small_pause(); + YieldProcessor(); } } } @@ -619,7 +610,7 @@ void FASTCALL KeReleaseInStackQueuedSpinLockFromDpcLevel( KLOCK_QUEUE_HANDLE *qu /* Otherwise, someone just queued themselves, but hasn't yet set * themselves as successor. Spin waiting for them to do so. */ while (!(next = queue->LockQueue.Next)) - small_pause(); + YieldProcessor(); }
InterlockedExchangePointer( (void **)&next->Lock, (KSPIN_LOCK *)((ULONG_PTR)lock | QUEUED_SPINLOCK_OWNED) );