DPC定时器

KeInitializeTimer 初始化定时器

KeInitializeTimerEx 初始化定时器

KeSetTimer 开启定时器(只执行一次)

KeSetTimerEx 开启定时器(可以设置循环)

KeInitializeDpc 初始化DPC对象

KeCancelTimer 取消定时器

在驱动中是以100纳秒为单位的

    1000纳秒=1微秒

    1000微秒=1毫秒

    1000毫秒=1秒    **

KTIMER            my_timer;//注意要定义全局变量

KDPC            KiTimerExpireDpc;//注意要定义全局变量

LARGE_INTEGER duetime = {  };

KeInitializeTimerEx(&my_timer, NotificationTimer);

KeInitializeDpc(&KiTimerExpireDpc, (PKDEFERRED_ROUTINE)KiTimerExpirationFunction, NULL);

KeSetTimerEx(&my_timer, duetime, , &KiTimerExpireDpc);

VOID KiTimerExpirationFunction(IN struct _KDPC  *Dpc,IN PVOID  DeferredContext,IN PVOID  SystemArgument1,IN PVOID  SystemArgument2

)

{

    KdPrint(("定时器....................\n"));

};

KeCancelTimer(&my_timer);//取消定时器

另外一种方法///////////////////////////////

typedef struct _DEVICE_EXTENSION {

    LIST_ENTRY      list_head;

    KSPIN_LOCK      list_lock;

    PVOID          thread_pointer;

    BOOLEAN            terminate_thread;

    KEVENT          request_event;

    KTIMER            my_timer;

    KDPC            KiTimerExpireDpc;

} DEVICE_EXTENSION, *PDEVICE_EXTENSION;

//创建设备

    IoCreateDevice(pDriverObj,sizeof(DEVICE_EXTENSION),NULL,FILE_DEVICE_UNKNOWN,,FALSE,&device_object);

    device_extension = (PDEVICE_EXTENSION)device_object->DeviceExtension;

    //初始化定时器

    KeInitializeTimerEx(&device_extension->my_timer, NotificationTimer);

    // 初始化定时器过程的DPC对象

    KeInitializeDpc(&device_extension->KiTimerExpireDpc,(PKDEFERRED_ROUTINE)KiTimerExpirationFunction, NULL);

    //启动定时器

    KeSetTimerEx(&device_extension->my_timer, duetime, , &device_extension->KiTimerExpireDpc);

    device_extension->terminate_thread = FALSE;

PDEVICE_EXTENSION  device_extension;

    device_extension = (PDEVICE_EXTENSION)pDriverObj->DeviceObject->DeviceExtension;

    //取消定时器

    KeCancelTimer(&device_extension->my_timer);