timer.c File Reference

#include "precomp.h"

Include dependency graph for timer.c:

Go to the source code of this file.

Classes
struct	_CTE_TIMER

Typedefs
typedef void(*	CTE_WORKER_ROUTINE) (struct _CTE_DELAYED_EVENT *, void *Context)
typedef struct _CTE_TIMER	CTE_TIMER
typedef struct _CTE_TIMER *	PCTE_TIMER

Functions
VOID NTAPI	InternalDpcRoutine (PKDPC Dpc, PVOID Context, PVOID SystemArgument1, PVOID SystemArgument2)
VOID NTAPI	CTEInitTimer (PCTE_TIMER Timer)
BOOLEAN NTAPI	CTEStartTimer (PCTE_TIMER Timer, ULONG DueTimeShort, CTE_WORKER_ROUTINE Callback, PVOID Context)
ULONG NTAPI	CTESystemUpTime (VOID)
BOOLEAN NTAPI	CTEInitialize (VOID)

Variables
LONG	CteTimeIncrement

Typedef Documentation

CTE_TIMER

typedef struct _CTE_TIMER CTE_TIMER

CTE_WORKER_ROUTINE

typedef void(* CTE_WORKER_ROUTINE) (struct _CTE_DELAYED_EVENT *, void *Context)

Definition at line 15 of file timer.c.

PCTE_TIMER

typedef struct _CTE_TIMER * PCTE_TIMER

Function Documentation

CTEInitialize()

BOOLEAN NTAPI CTEInitialize

(

VOID

)

Definition at line 112 of file timer.c.

{
    /* Just return success */
    return TRUE;
}

CTEInitTimer()

VOID NTAPI CTEInitTimer

(

PCTE_TIMER

Timer

)

Definition at line 49 of file timer.c.

{
    /* Zero all fields */
    RtlZeroMemory(Timer, sizeof(CTE_TIMER));
 
    /* Create a DPC and a timer */
    KeInitializeDpc(&Timer->Dpc, InternalDpcRoutine, Timer);
    KeInitializeTimer(&Timer->Timer);
}

CTEStartTimer()

BOOLEAN NTAPI CTEStartTimer	(	PCTE_TIMER	Timer,
		ULONG	DueTimeShort,
		CTE_WORKER_ROUTINE	Callback,
		PVOID	Context
	)

Definition at line 64 of file timer.c.

{
    LARGE_INTEGER DueTime;
 
    /* Make sure a callback was provided */
    ASSERT(Callback);
 
    /* We need to convert due time, because DueTimeShort is in ms,
       but NT timer expects 100s of ns, negative one */
    DueTime.QuadPart = -Int32x32To64(DueTimeShort, 10000);
 
    /* Set other timer members */
    Timer->Callback = Callback;
    Timer->Context = Context;
 
    /* Set the timer */
    KeSetTimer(&Timer->Timer, DueTime, &Timer->Dpc);
 
    return TRUE;
}

CTESystemUpTime()

ULONG NTAPI CTESystemUpTime

(

VOID

)

Definition at line 94 of file timer.c.

{
    LARGE_INTEGER Ticks;
 
    /* Get the tick count */
    KeQueryTickCount(&Ticks);
 
    /* Convert to 100s of ns and then to ms*/
    Ticks.QuadPart = (Ticks.QuadPart * CteTimeIncrement) / 10000ULL;
 
    return Ticks.LowPart;
}

InternalDpcRoutine()

VOID NTAPI InternalDpcRoutine	(	PKDPC	Dpc,
		PVOID	Context,
		PVOID	SystemArgument1,
		PVOID	SystemArgument2
	)

Definition at line 33 of file timer.c.

{
    PCTE_TIMER Timer = (PCTE_TIMER)Context;
 
    /* Call our registered callback */
    Timer->Callback((struct _CTE_DELAYED_EVENT *)Timer, Timer->Context);
}

Referenced by CTEInitTimer().

Variable Documentation

CteTimeIncrement

LONG CteTimeIncrement

Definition at line 27 of file timer.c.

Referenced by CTESystemUpTime(), and DriverEntry().