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ntoskrnl.exe: Implement DPC-level queued spinlock functions.

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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 2019-01-28 19:21:12 -06:00 committed by Alexandre Julliard
parent 558cdd7a2b
commit c3c2a4f697
2 changed files with 67 additions and 2 deletions
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4
dlls/ntoskrnl.exe/ntoskrnl.exe.spec
View file

@ -42,9 +42,9 @@
@ stdcall -norelay IofCallDriver(ptr ptr)
@ stdcall -norelay IofCompleteRequest(ptr long)
@ stdcall -norelay KeAcquireInStackQueuedSpinLock(ptr ptr)
@ stub KeAcquireInStackQueuedSpinLockAtDpcLevel
@ stdcall -norelay KeAcquireInStackQueuedSpinLockAtDpcLevel(ptr ptr)
@ stdcall -norelay KeReleaseInStackQueuedSpinLock(ptr)
@ stub KeReleaseInStackQueuedSpinLockFromDpcLevel
@ stdcall -norelay KeReleaseInStackQueuedSpinLockFromDpcLevel(ptr)
@ stub KeSetTimeUpdateNotifyRoutine
@ stub KefAcquireSpinLockAtDpcLevel
@ stub KefReleaseSpinLockFromDpcLevel

65
dlls/ntoskrnl.exe/sync.c
View file

@ -414,6 +414,71 @@ void WINAPI KeReleaseSpinLockFromDpcLevel( KSPIN_LOCK *lock )
InterlockedExchangePointer( (void **)lock, 0 );
}
#define QUEUED_SPINLOCK_OWNED 0x2
/***********************************************************************
* KeAcquireInStackQueuedSpinLockAtDpcLevel (NTOSKRNL.EXE.@)
*/
#ifdef DEFINE_FASTCALL2_ENTRYPOINT
DEFINE_FASTCALL2_ENTRYPOINT( KeAcquireInStackQueuedSpinLockAtDpcLevel )
void WINAPI DECLSPEC_HIDDEN __regs_KeAcquireInStackQueuedSpinLockAtDpcLevel( KSPIN_LOCK *lock, KLOCK_QUEUE_HANDLE *queue )
#else
void WINAPI KeAcquireInStackQueuedSpinLockAtDpcLevel( KSPIN_LOCK *lock, KLOCK_QUEUE_HANDLE *queue )
#endif
{
KSPIN_LOCK_QUEUE *tail;
TRACE("lock %p, queue %p.\n", lock, queue);
queue->LockQueue.Next = NULL;
if (!(tail = InterlockedExchangePointer( (void **)lock, &queue->LockQueue )))
queue->LockQueue.Lock = (KSPIN_LOCK *)((ULONG_PTR)lock | QUEUED_SPINLOCK_OWNED);
else
{
queue->LockQueue.Lock = lock;
InterlockedExchangePointer( (void **)&tail->Next, &queue->LockQueue );
while (!((ULONG_PTR)InterlockedCompareExchangePointer( (void **)&queue->LockQueue.Lock, 0, 0 )
& QUEUED_SPINLOCK_OWNED))
{
small_pause();
}
}
}
/***********************************************************************
* KeReleaseInStackQueuedSpinLockFromDpcLevel (NTOSKRNL.EXE.@)
*/
#ifdef DEFINE_FASTCALL1_ENTRYPOINT
DEFINE_FASTCALL1_ENTRYPOINT( KeReleaseInStackQueuedSpinLockFromDpcLevel )
void WINAPI DECLSPEC_HIDDEN __regs_KeReleaseInStackQueuedSpinLockFromDpcLevel( KLOCK_QUEUE_HANDLE *queue )
#else
void WINAPI KeReleaseInStackQueuedSpinLockFromDpcLevel( KLOCK_QUEUE_HANDLE *queue )
#endif
{
KSPIN_LOCK *lock = (KSPIN_LOCK *)((ULONG_PTR)queue->LockQueue.Lock & ~QUEUED_SPINLOCK_OWNED);
KSPIN_LOCK_QUEUE *next;
TRACE("lock %p, queue %p.\n", lock, queue);
queue->LockQueue.Lock = NULL;
if (!(next = queue->LockQueue.Next))
{
/* If we are truly the last in the queue, the lock will point to us. */
if (InterlockedCompareExchangePointer( (void **)lock, NULL, &queue->LockQueue ) == queue)
return;
/* 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();
}
InterlockedExchangePointer( (void **)&next->Lock, (KSPIN_LOCK *)((ULONG_PTR)lock | QUEUED_SPINLOCK_OWNED) );
}
#ifndef __i386__
/***********************************************************************
* KeReleaseSpinLock (NTOSKRNL.EXE.@)