103 lines
1.7 KiB
C
103 lines
1.7 KiB
C
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/*++
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Copyright (c) 2000 Microsoft Corporation
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Module Name:
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interobj.c
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Abstract:
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This module implements functions to acquire and release the spin lock
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associated with an interrupt object.
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Author:
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David N. Cutler (davec) 10-Apr-2000
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Environment:
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Kernel mode only.
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Revision History:
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--*/
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#include "ki.h"
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KIRQL
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KeAcquireInterruptSpinLock (
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IN PKINTERRUPT Interrupt
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)
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/*++
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Routine Description:
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This function raises the IRQL to the interrupt synchronization level
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and acquires the actual spin lock associated with an interrupt object.
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Arguments:
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Interrupt - Supplies a pointer to a control object of type interrupt.
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Return Value:
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The previous IRQL is returned as the function value.
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--*/
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{
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KIRQL OldIrql;
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//
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// Raise IRQL to interrupt synchronization level and acquire the actual
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// spin lock associated with the interrupt object.
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//
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KeRaiseIrql(Interrupt->SynchronizeIrql, &OldIrql);
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KeAcquireSpinLockAtDpcLevel(Interrupt->ActualLock);
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return OldIrql;
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}
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VOID
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KeReleaseInterruptSpinLock (
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IN PKINTERRUPT Interrupt,
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IN KIRQL OldIrql
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)
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/*++
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Routine Description:
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This function releases the actual spin lock associated with an interrupt
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object and lowers the IRQL to its previous value.
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Arguments:
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Interrupt - Supplies a pointer to a control object of type interrupt.
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OldIrql - Supplies the previous IRQL value.
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Return Value:
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None.
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--*/
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{
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//
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// Release the actual spin lock associated with the interrupt object
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// and lower IRQL to its previous value.
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//
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KeReleaseSpinLockFromDpcLevel(Interrupt->ActualLock);
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KeLowerIrql(OldIrql);
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return;
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}
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