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