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93 lines
1.8 KiB
93 lines
1.8 KiB
/*++
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Copyright (c) 1989 Microsoft Corporation
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Module Name:
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delay.c
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Abstract:
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This module implements the executive delay execution system service.
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Author:
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David N. Cutler (davec) 13-May-1989
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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 "exp.h"
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text(PAGE, NtDelayExecution)
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#endif
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NTSTATUS
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NtDelayExecution (
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IN BOOLEAN Alertable,
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IN PLARGE_INTEGER DelayInterval
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)
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/*++
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Routine Description:
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This function delays the execution of the current thread for the specified
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interval of time.
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Arguments:
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Alertable - Supplies a boolean value that specifies whether the delay
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is alertable.
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DelayInterval - Supplies the absolute of relative time over which the
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delay is to occur.
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Return Value:
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NTSTATUS.
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--*/
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{
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LARGE_INTEGER Interval;
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KPROCESSOR_MODE PreviousMode;
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//
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// Establish an exception handler and probe delay interval address. If
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// the probe fails, then return the exception code as the service status.
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// Otherwise return the status value returned by the delay execution
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// routine.
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//
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// Get previous processor mode and probe delay interval address if
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// necessary.
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//
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PreviousMode = KeGetPreviousMode();
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if (PreviousMode != KernelMode) {
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try {
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ProbeForReadSmallStructure (DelayInterval, sizeof(LARGE_INTEGER), sizeof(ULONG));
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Interval = *DelayInterval;
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} except(EXCEPTION_EXECUTE_HANDLER) {
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return GetExceptionCode();
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}
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}
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else {
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Interval = *DelayInterval;
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}
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//
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// Delay execution for the specified amount of time.
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//
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return KeDelayExecutionThread(PreviousMode, Alertable, &Interval);
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}
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