spinlock.c File Reference

#include <ntoskrnl.h>
#include <debug.h>

Include dependency graph for spinlock.c:

Go to the source code of this file.

Macros
#define	NDEBUG

Functions
KIRQL	KeAcquireSpinLockRaiseToSynch (PKSPIN_LOCK SpinLock)
KIRQL NTAPI	KeAcquireSpinLockRaiseToDpc (PKSPIN_LOCK SpinLock)
VOID NTAPI	KeReleaseSpinLock (PKSPIN_LOCK SpinLock, KIRQL OldIrql)
KIRQL	KeAcquireQueuedSpinLock (IN KSPIN_LOCK_QUEUE_NUMBER LockNumber)
KIRQL	KeAcquireQueuedSpinLockRaiseToSynch (IN KSPIN_LOCK_QUEUE_NUMBER LockNumber)
VOID	KeAcquireInStackQueuedSpinLock (IN PKSPIN_LOCK SpinLock, IN PKLOCK_QUEUE_HANDLE LockHandle)
VOID	KeAcquireInStackQueuedSpinLockRaiseToSynch (IN PKSPIN_LOCK SpinLock, IN PKLOCK_QUEUE_HANDLE LockHandle)
VOID	KeReleaseQueuedSpinLock (IN KSPIN_LOCK_QUEUE_NUMBER LockNumber, IN KIRQL OldIrql)
VOID	KeReleaseInStackQueuedSpinLock (IN PKLOCK_QUEUE_HANDLE LockHandle)
BOOLEAN	KeTryToAcquireQueuedSpinLockRaiseToSynch (IN KSPIN_LOCK_QUEUE_NUMBER LockNumber, IN PKIRQL OldIrql)
LOGICAL	KeTryToAcquireQueuedSpinLock (IN KSPIN_LOCK_QUEUE_NUMBER LockNumber, OUT PKIRQL OldIrql)

Macro Definition Documentation

NDEBUG

#define NDEBUG

Definition at line 12 of file spinlock.c.

Function Documentation

KeAcquireInStackQueuedSpinLock()

VOID KeAcquireInStackQueuedSpinLock	(	IN PKSPIN_LOCK	SpinLock,
		IN PKLOCK_QUEUE_HANDLE	LockHandle
	)

Definition at line 102 of file spinlock.c.

{
    /* 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
}

KeAcquireInStackQueuedSpinLockRaiseToSynch()

VOID KeAcquireInStackQueuedSpinLockRaiseToSynch	(	IN PKSPIN_LOCK	SpinLock,
		IN PKLOCK_QUEUE_HANDLE	LockHandle
	)

Definition at line 121 of file spinlock.c.

{
    /* 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
}

KeAcquireQueuedSpinLock()

KIRQL KeAcquireQueuedSpinLock

(

IN KSPIN_LOCK_QUEUE_NUMBER

LockNumber

)

Definition at line 70 of file spinlock.c.

{
    KIRQL OldIrql;
 
    /* Raise to dispatch */
    KeRaiseIrql(DISPATCH_LEVEL, &OldIrql);
 
    /* Acquire the lock */
    KxAcquireSpinLock(KeGetCurrentPrcb()->LockQueue[LockNumber].Lock); // HACK
    return OldIrql;
}

KeAcquireQueuedSpinLockRaiseToSynch()

KIRQL KeAcquireQueuedSpinLockRaiseToSynch

(

IN KSPIN_LOCK_QUEUE_NUMBER

LockNumber

)

Definition at line 86 of file spinlock.c.

{
    KIRQL OldIrql;
 
    /* Raise to synch */
    KeRaiseIrql(SYNCH_LEVEL, &OldIrql);
 
    /* Acquire the lock */
    KxAcquireSpinLock(KeGetCurrentPrcb()->LockQueue[LockNumber].Lock); // HACK
    return OldIrql;
}

KeAcquireSpinLockRaiseToDpc()

KIRQL NTAPI KeAcquireSpinLockRaiseToDpc

(

PKSPIN_LOCK

SpinLock

)

Definition at line 41 of file spinlock.c.

{
    KIRQL OldIrql;
 
    /* Raise to dispatch */
    KeRaiseIrql(DISPATCH_LEVEL, &OldIrql);
 
    /* Acquire the lock and return */
    KxAcquireSpinLock(SpinLock);
    return OldIrql;
}

KeAcquireSpinLockRaiseToSynch()

KIRQL KeAcquireSpinLockRaiseToSynch

(

PKSPIN_LOCK

SpinLock

)

Definition at line 24 of file spinlock.c.

{
    KIRQL OldIrql;
 
    /* Raise to sync */
    KeRaiseIrql(SYNCH_LEVEL, &OldIrql);
 
    /* Acquire the lock and return */
    KxAcquireSpinLock(SpinLock);
    return OldIrql;
}

KeReleaseInStackQueuedSpinLock()

VOID KeReleaseInStackQueuedSpinLock

(

IN PKLOCK_QUEUE_HANDLE

LockHandle

)

Definition at line 155 of file spinlock.c.

{
    /* Simply lower IRQL back */
    KxReleaseSpinLock(LockHandle->LockQueue.Lock); // HACK
    KeLowerIrql(LockHandle->OldIrql);
}

KeReleaseQueuedSpinLock()

VOID KeReleaseQueuedSpinLock	(	IN KSPIN_LOCK_QUEUE_NUMBER	LockNumber,
		IN KIRQL	OldIrql
	)

Definition at line 140 of file spinlock.c.

{
    /* Release the lock */
    KxReleaseSpinLock(KeGetCurrentPrcb()->LockQueue[LockNumber].Lock); // HACK
 
    /* Lower IRQL back */
    KeLowerIrql(OldIrql);
}

KeReleaseSpinLock()

VOID NTAPI KeReleaseSpinLock	(	PKSPIN_LOCK	SpinLock,
		KIRQL	OldIrql
	)

Definition at line 58 of file spinlock.c.

{
    /* Release the lock and lower IRQL back */
    KxReleaseSpinLock(SpinLock);
    KeLowerIrql(OldIrql);
}

KeTryToAcquireQueuedSpinLock()

LOGICAL KeTryToAcquireQueuedSpinLock	(	IN KSPIN_LOCK_QUEUE_NUMBER	LockNumber,
		OUT PKIRQL	OldIrql
	)

Definition at line 190 of file spinlock.c.

{
    /* Raise to dispatch level */
    KeRaiseIrql(DISPATCH_LEVEL, OldIrql);
 
#ifdef CONFIG_SMP
    // HACK
    return KeTryToAcquireSpinLockAtDpcLevel(KeGetCurrentPrcb()->LockQueue[LockNumber].Lock);
#else
 
    /* 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;
#endif
}

KeTryToAcquireQueuedSpinLockRaiseToSynch()

BOOLEAN KeTryToAcquireQueuedSpinLockRaiseToSynch	(	IN KSPIN_LOCK_QUEUE_NUMBER	LockNumber,
		IN PKIRQL	OldIrql
	)

Definition at line 167 of file spinlock.c.

{
    /* Raise to synch level */
    KeRaiseIrql(SYNCH_LEVEL, OldIrql);
 
#ifdef CONFIG_SMP
    // HACK
    return KeTryToAcquireSpinLockAtDpcLevel(KeGetCurrentPrcb()->LockQueue[LockNumber].Lock);
#else
    /* 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;
#endif
}