91 lines
1.8 KiB
C
91 lines
1.8 KiB
C
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//
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//
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// CTESTUFF.C
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//
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// This file contains Common Transport Environment code to handle
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// OS dependent functions such as allocating memory etc.
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//
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//
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#include "precomp.h"
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// to convert a millisecond to a 100ns time
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//
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#define MILLISEC_TO_100NS 10000
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//----------------------------------------------------------------------------
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PVOID
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CTEStartTimer(
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IN CTETimer *pTimerIn,
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IN ULONG DeltaTime,
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IN CTEEventRtn TimerExpiry,
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IN PVOID Context OPTIONAL
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)
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/*++
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Routine Description:
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This Routine starts a timer.
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Arguments:
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Timer - Timer structure
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TimerExpiry - completion routine
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Return Value:
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PVOID - a pointer to the memory or NULL if a failure
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--*/
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{
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LARGE_INTEGER Time;
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//
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// initialize the DPC to have the correct completion routine and context
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//
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KeInitializeDpc(&pTimerIn->t_dpc,
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(PVOID)TimerExpiry, // completion routine
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Context); // context value
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//
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// convert to 100 ns units by multiplying by 10,000
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//
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Time.QuadPart = UInt32x32To64(DeltaTime,(LONG)MILLISEC_TO_100NS);
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//
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// to make a delta time, negate the time
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//
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Time.QuadPart = -(Time.QuadPart);
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ASSERT(Time.QuadPart < 0);
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(VOID)KeSetTimer(&pTimerIn->t_timer,Time,&pTimerIn->t_dpc);
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return(NULL);
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}
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//----------------------------------------------------------------------------
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VOID
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CTEInitTimer(
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IN CTETimer *pTimerIn
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)
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/*++
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Routine Description:
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This Routine initializes a timer.
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Arguments:
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Timer - Timer structure
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TimerExpiry - completion routine
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Return Value:
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PVOID - a pointer to the memory or NULL if a failure
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--*/
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{
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KeInitializeTimer(&pTimerIn->t_timer);
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}
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