reactos/ntoskrnl/ke/amd64/spinlock.c

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/*
* PROJECT: ReactOS HAL
* LICENSE: GPL - See COPYING in the top level directory
* FILE: hal/halx86/up/spinlock.c
* PURPOSE: Spinlock and Queued Spinlock Support
* PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
*/
/* INCLUDES ******************************************************************/
#include <ntoskrnl.h>
#define NDEBUG
#include <debug.h>
#undef KeAcquireSpinLock
#undef KeReleaseSpinLock
/* FUNCTIONS *****************************************************************/
/*
* @implemented
*/
KIRQL
KeAcquireSpinLockRaiseToSynch(PKSPIN_LOCK SpinLock)
{
KIRQL OldIrql;
/* Raise to sync */
KeRaiseIrql(SYNCH_LEVEL, &OldIrql);
/* Acquire the lock and return */
KxAcquireSpinLock(SpinLock);
return OldIrql;
}
/*
* @implemented
*/
KIRQL
NTAPI
KeAcquireSpinLockRaiseToDpc(PKSPIN_LOCK SpinLock)
{
KIRQL OldIrql;
/* Raise to dispatch */
KeRaiseIrql(DISPATCH_LEVEL, &OldIrql);
/* Acquire the lock and return */
KxAcquireSpinLock(SpinLock);
return OldIrql;
}
/*
* @implemented
*/
VOID
NTAPI
KeReleaseSpinLock(PKSPIN_LOCK SpinLock,
KIRQL OldIrql)
{
/* Release the lock and lower IRQL back */
KxReleaseSpinLock(SpinLock);
KeLowerIrql(OldIrql);
}
/*
* @implemented
*/
KIRQL
KeAcquireQueuedSpinLock(IN KSPIN_LOCK_QUEUE_NUMBER LockNumber)
{
KIRQL OldIrql;
/* Raise to dispatch */
KeRaiseIrql(DISPATCH_LEVEL, &OldIrql);
/* Acquire the lock */
KxAcquireSpinLock(KeGetCurrentPrcb()->LockQueue[LockNumber].Lock); // HACK
return OldIrql;
}
/*
* @implemented
*/
KIRQL
KeAcquireQueuedSpinLockRaiseToSynch(IN KSPIN_LOCK_QUEUE_NUMBER LockNumber)
{
KIRQL OldIrql;
/* Raise to synch */
KeRaiseIrql(SYNCH_LEVEL, &OldIrql);
/* Acquire the lock */
KxAcquireSpinLock(KeGetCurrentPrcb()->LockQueue[LockNumber].Lock); // HACK
return OldIrql;
}
/*
* @implemented
*/
VOID
KeAcquireInStackQueuedSpinLock(IN PKSPIN_LOCK SpinLock,
IN PKLOCK_QUEUE_HANDLE LockHandle)
{
/* Set up the lock */
LockHandle->LockQueue.Next = NULL;
LockHandle->LockQueue.Lock = SpinLock;
/* Raise to dispatch */
KeRaiseIrql(DISPATCH_LEVEL, &LockHandle->OldIrql);
/* Acquire the lock */
KxAcquireSpinLock(LockHandle->LockQueue.Lock); // HACK
}
/*
* @implemented
*/
VOID
KeAcquireInStackQueuedSpinLockRaiseToSynch(IN PKSPIN_LOCK SpinLock,
IN PKLOCK_QUEUE_HANDLE LockHandle)
{
/* Set up the lock */
LockHandle->LockQueue.Next = NULL;
LockHandle->LockQueue.Lock = SpinLock;
/* Raise to synch */
KeRaiseIrql(SYNCH_LEVEL, &LockHandle->OldIrql);
/* Acquire the lock */
KxAcquireSpinLock(LockHandle->LockQueue.Lock); // HACK
}
/*
* @implemented
*/
VOID
KeReleaseQueuedSpinLock(IN KSPIN_LOCK_QUEUE_NUMBER LockNumber,
IN KIRQL OldIrql)
{
/* Release the lock */
KxReleaseSpinLock(KeGetCurrentPrcb()->LockQueue[LockNumber].Lock); // HACK
/* Lower IRQL back */
KeLowerIrql(OldIrql);
}
/*
* @implemented
*/
VOID
KeReleaseInStackQueuedSpinLock(IN PKLOCK_QUEUE_HANDLE LockHandle)
{
/* Simply lower IRQL back */
KxReleaseSpinLock(LockHandle->LockQueue.Lock); // HACK
KeLowerIrql(LockHandle->OldIrql);
}
/*
* @implemented
*/
BOOLEAN
KeTryToAcquireQueuedSpinLockRaiseToSynch(IN KSPIN_LOCK_QUEUE_NUMBER LockNumber,
IN PKIRQL OldIrql)
{
#ifndef CONFIG_SMP
/* Simply raise to dispatch */
KeRaiseIrql(DISPATCH_LEVEL, OldIrql);
/* Add an explicit memory barrier to prevent the compiler from reordering
memory accesses across the borders of spinlocks */
KeMemoryBarrierWithoutFence();
/* Always return true on UP Machines */
return TRUE;
#else
UNIMPLEMENTED;
ASSERT(FALSE);
#endif
}
/*
* @implemented
*/
LOGICAL
KeTryToAcquireQueuedSpinLock(IN KSPIN_LOCK_QUEUE_NUMBER LockNumber,
OUT PKIRQL OldIrql)
{
#ifndef CONFIG_SMP
/* Simply raise to dispatch */
KeRaiseIrql(DISPATCH_LEVEL, OldIrql);
/* Add an explicit memory barrier to prevent the compiler from reordering
memory accesses across the borders of spinlocks */
KeMemoryBarrierWithoutFence();
/* Always return true on UP Machines */
return TRUE;
#else
UNIMPLEMENTED;
ASSERT(FALSE);
#endif
}
/* EOF */