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https://github.com/reactos/reactos.git
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201 lines
3.3 KiB
C
201 lines
3.3 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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* FILE: hal/halx86/mp/spinlock.c
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* PURPOSE: Implements spinlocks
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* PROGRAMMER: David Welch (welch@cwcom.net)
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* Eric Kohl
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* UPDATE HISTORY:
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* 09/06/2000 Created
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*/
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/*
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* NOTE: On a uniprocessor machine spinlocks are implemented by raising
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* the irq level
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*/
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/* INCLUDES ****************************************************************/
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#include <hal.h>
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#define NDEBUG
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#include <debug.h>
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/* Hmm, needed for KDBG := 1. Why? */
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#undef KeGetCurrentIrql
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/* FUNCTIONS ***************************************************************/
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#undef KeAcquireSpinLock
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VOID NTAPI
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KeAcquireSpinLock (
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PKSPIN_LOCK SpinLock,
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PKIRQL OldIrql
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)
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/*
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* FUNCTION: Acquires a spinlock
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* ARGUMENTS:
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* SpinLock = Spinlock to acquire
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* OldIrql (OUT) = Caller supplied storage for the previous irql
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*/
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{
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*OldIrql = KfAcquireSpinLock(SpinLock);
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}
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KIRQL FASTCALL
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KeAcquireSpinLockRaiseToSynch (
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PKSPIN_LOCK SpinLock
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)
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{
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KIRQL OldIrql;
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OldIrql = KfRaiseIrql(CLOCK2_LEVEL);
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KiAcquireSpinLock(SpinLock);
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return OldIrql;
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}
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#undef KeReleaseSpinLock
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VOID NTAPI
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KeReleaseSpinLock (
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PKSPIN_LOCK SpinLock,
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KIRQL NewIrql
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)
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/*
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* FUNCTION: Releases a spinlock
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* ARGUMENTS:
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* SpinLock = Spinlock to release
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* NewIrql = Irql level before acquiring the spinlock
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*/
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{
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KfReleaseSpinLock(SpinLock, NewIrql);
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}
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LOGICAL
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FASTCALL
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KeTryToAcquireQueuedSpinLock(
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KSPIN_LOCK_QUEUE_NUMBER LockNumber,
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PKIRQL OldIrql)
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{
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UNIMPLEMENTED;
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return FALSE;
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}
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BOOLEAN
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FASTCALL
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KeTryToAcquireQueuedSpinLockRaiseToSynch(
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KSPIN_LOCK_QUEUE_NUMBER LockNumber,
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PKIRQL OldIrql)
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{
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UNIMPLEMENTED;
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return FALSE;
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}
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KIRQL FASTCALL
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KfAcquireSpinLock (
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PKSPIN_LOCK SpinLock
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)
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{
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KIRQL OldIrql;
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ASSERT(KeGetCurrentIrql() <= DISPATCH_LEVEL);
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OldIrql = KfRaiseIrql(DISPATCH_LEVEL);
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KiAcquireSpinLock(SpinLock);
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return OldIrql;
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}
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VOID FASTCALL
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KfReleaseSpinLock (
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PKSPIN_LOCK SpinLock,
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KIRQL NewIrql
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)
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/*
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* FUNCTION: Releases a spinlock
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* ARGUMENTS:
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* SpinLock = Spinlock to release
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* NewIrql = Irql level before acquiring the spinlock
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*/
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{
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ASSERT(KeGetCurrentIrql() == DISPATCH_LEVEL || KeGetCurrentIrql() == SYNCH_LEVEL);
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KiReleaseSpinLock(SpinLock);
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KfLowerIrql(NewIrql);
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}
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/*
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* @unimplemented
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*/
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VOID
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FASTCALL
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KeAcquireInStackQueuedSpinLock(
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IN PKSPIN_LOCK SpinLock,
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IN PKLOCK_QUEUE_HANDLE LockHandle
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)
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{
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UNIMPLEMENTED;
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}
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/*
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* @unimplemented
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*/
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VOID
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FASTCALL
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KeAcquireInStackQueuedSpinLockRaiseToSynch(
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IN PKSPIN_LOCK SpinLock,
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IN PKLOCK_QUEUE_HANDLE LockHandle
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)
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{
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UNIMPLEMENTED;
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}
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/*
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* @unimplemented
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*/
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VOID
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FASTCALL
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KeReleaseInStackQueuedSpinLock(
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IN PKLOCK_QUEUE_HANDLE LockHandle
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)
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{
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UNIMPLEMENTED;
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}
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/*
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* @unimplemented
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*/
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KIRQL
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FASTCALL
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KeAcquireQueuedSpinLock(IN KSPIN_LOCK_QUEUE_NUMBER Number)
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{
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UNIMPLEMENTED;
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return 0;
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}
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/*
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* @unimplemented
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*/
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KIRQL
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FASTCALL
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KeAcquireQueuedSpinLockRaiseToSynch(IN KSPIN_LOCK_QUEUE_NUMBER LockNumber)
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{
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UNIMPLEMENTED;
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return 0;
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}
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/*
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* @unimplemented
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*/
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VOID
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FASTCALL
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KeReleaseQueuedSpinLock(IN KSPIN_LOCK_QUEUE_NUMBER Number,
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IN KIRQL OldIrql)
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{
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UNIMPLEMENTED;
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}
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/* EOF */
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