I/O定时器_3秒执行一次_1秒执行一次

#include 
#include 
//使用CTL_CODE必须加入winioctl.h
#include 
#include "..\IO定时器\Ioctls.h"
int main()
{
	HANDLE hDevice = 
		CreateFile(L"\\\\.\\HelloDDK",
					GENERIC_READ | GENERIC_WRITE,
					0,		// share mode none
					NULL,	// no security
					OPEN_EXISTING,
					FILE_ATTRIBUTE_NORMAL,
					NULL );		// no template
	if (hDevice == INVALID_HANDLE_VALUE)
	{
		printf("Failed to obtain file handle to device: "
			"%s with Win32 error code: %d\n",
			"MyWDMDevice", GetLastError() );
		return 1;
	}
	DWORD dwOutput;
	DeviceIoControl(hDevice, IOCTL_START_TIMER, NULL, 0, NULL, 0, &dwOutput, NULL);//将控制代码直接发送给指定的设备驱动程序，使相应的设备执行相应的操作。
	system("pause");
 	DeviceIoControl(hDevice, IOCTL_STOP, NULL, 0, NULL, 0, &dwOutput, NULL);
	CloseHandle(hDevice);
	system("pause");
	return 0;
}

// IOCTLS.H -- IOCTL code definitions for fileio driver
// Copyright (C) 1999 by Walter Oney
// All rights reserved
#ifndef IOCTLS_H
#define IOCTLS_H
#ifndef CTL_CODE
	#pragma message("CTL_CODE undefined. Include winioctl.h or wdm.h")
#endif
#define IOCTL_START_TIMER CTL_CODE(\
			FILE_DEVICE_UNKNOWN, \
			0x800, \
			METHOD_BUFFERED, \
			FILE_ANY_ACCESS)

#define IOCTL_STOP CTL_CODE(\
			FILE_DEVICE_UNKNOWN, \
			0x801, \
			METHOD_IN_DIRECT, \
			FILE_ANY_ACCESS)
#endif

/************************************************************************
* 文件名称:Driver.h                                                 
* 作    者:张帆
* 完成日期:2007-11-1
*************************************************************************/
#pragma once
#ifdef __cplusplus
extern "C"
{
#endif
#include 
#ifdef __cplusplus
}
#endif 
#include "ioctls.h"
#define PAGEDCODE code_seg("PAGE")
#define LOCKEDCODE code_seg()
#define INITCODE code_seg("INIT")
#define PAGEDDATA data_seg("PAGE")
#define LOCKEDDATA data_seg()
#define INITDATA data_seg("INIT")
#define arraysize(p) (sizeof(p)/sizeof((p)[0]))
//设定3秒间隔时间
#define TIMER_OUT	4
typedef struct _DEVICE_EXTENSION {
	PDEVICE_OBJECT pDevice;
	UNICODE_STRING ustrDeviceName;	//设备名称
	UNICODE_STRING ustrSymLinkName;	//符号链接名
	LONG lTimerCount;
} DEVICE_EXTENSION, *PDEVICE_EXTENSION;
// 函数声明
NTSTATUS CreateDevice (IN PDRIVER_OBJECT pDriverObject);
VOID HelloDDKUnload (IN PDRIVER_OBJECT pDriverObject);
NTSTATUS HelloDDKDispatchRoutin(IN PDEVICE_OBJECT pDevObj,
								 IN PIRP pIrp);
NTSTATUS HelloDDKDeviceIOControl(IN PDEVICE_OBJECT pDevObj,
								 IN PIRP pIrp);

/************************************************************************
* 文件名称:Driver.cpp                                                 
* 作    者:张帆
* 完成日期:2007-11-1
*************************************************************************/
#include "Driver.h"
/************************************************************************
* 函数名称:DriverEntry
* 功能描述:初始化驱动程序，定位和申请硬件资源，创建内核对象
* 参数列表:
      pDriverObject:从I/O管理器中传进来的驱动对象
      pRegistryPath:驱动程序在注册表的中的路径
* 返回 值:返回初始化驱动状态
*************************************************************************/
#pragma INITCODE
extern "C" NTSTATUS DriverEntry (IN PDRIVER_OBJECT pDriverObject,IN PUNICODE_STRING pRegistryPath	) 
{
	NTSTATUS status;
	KdPrint(("Enter DriverEntry\n"));
	//设置卸载函数
	pDriverObject->DriverUnload = HelloDDKUnload;
	//设置派遣函数
	for (int i = 0; i < arraysize(pDriverObject->MajorFunction); ++i)
		pDriverObject->MajorFunction[i] = HelloDDKDispatchRoutin;
	pDriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] = HelloDDKDeviceIOControl;
	//创建驱动设备对象
	status = CreateDevice(pDriverObject);
	//IoStartTimer(pDriverObject->DeviceObject);
	KdPrint(("Leave DriverEntry\n"));
	return status;
}
#pragma LOCKEDCODE
VOID OnTimer(IN PDEVICE_OBJECT DeviceObject,IN PVOID Context)//定时器回调函数
{
	PDEVICE_EXTENSION pDevExt = (PDEVICE_EXTENSION)DeviceObject->DeviceExtension;
	KdPrint(("Enter OnTimer!\n"));
	//将计数器自锁减一
	InterlockedDecrement(&pDevExt->lTimerCount);//3秒	计算机语言函数，该函数减小指定的变量，并检查值，可以保证同一时刻只有一个线程访问该变量，即保证增加操作的原子性。
	LONG previousCount = InterlockedCompareExchange(&pDevExt->lTimerCount,TIMER_OUT,0);//如果计数器减到0，重新编程TIMER_OUT，整个过程是互锁运算  扩展减到0 再弄成3
	//是把目标操作数（第1参数所指向的内存中的数）与一个值（第3参数）比较，如果相等，则用另一个值（第2参数）与目标操作数（第1参数所指向的内存中的数）交换；InterlockedExchange是不比较直接交换。
	//每隔三秒，计数器一个循环，输出以下log
	if (previousCount == 0)//返回值是 Destination(第一个参数) 指针的初始值
	{
		//KdPrint(("%d seconds time out!\n",TIMER_OUT));
		KdPrint(("这里是3秒执行一次"));
	}
	//证明该线程运行在任意线程上下文的
    PEPROCESS pEProcess = IoGetCurrentProcess();
    PTSTR ProcessName = (PTSTR)((ULONG)pEProcess + 0x174);//即可得到用户进程
    KdPrint(("当前进程名%s\n",ProcessName));
}
/************************************************************************
* 函数名称:CreateDevice
* 功能描述:初始化设备对象
* 参数列表:
      pDriverObject:从I/O管理器中传进来的驱动对象
* 返回 值:返回初始化状态
*************************************************************************/
#pragma INITCODE
NTSTATUS CreateDevice (IN PDRIVER_OBJECT	pDriverObject) 
{
	NTSTATUS status;
	PDEVICE_OBJECT pDevObj;
	PDEVICE_EXTENSION pDevExt;
	//创建设备名称
	UNICODE_STRING devName;
	RtlInitUnicodeString(&devName,L"\\Device\\MyDDKDevice");
	//创建设备
	status = IoCreateDevice( pDriverObject,
						sizeof(DEVICE_EXTENSION),
						&(UNICODE_STRING)devName,
						FILE_DEVICE_UNKNOWN,
						0, TRUE,
						&pDevObj );
	if (!NT_SUCCESS(status))
		return status;

	pDevObj->Flags |= DO_DIRECT_IO;
	pDevExt = (PDEVICE_EXTENSION)pDevObj->DeviceExtension;
	pDevExt->pDevice = pDevObj;
	pDevExt->ustrDeviceName = devName;
	IoInitializeTimer(pDevObj,OnTimer,NULL);//io定时器初始化
	//创建符号链接
	UNICODE_STRING symLinkName;
	RtlInitUnicodeString(&symLinkName,L"\\??\\HelloDDK");
	pDevExt->ustrSymLinkName = symLinkName;
	status = IoCreateSymbolicLink( &symLinkName,&devName );
	if (!NT_SUCCESS(status)) 
	{
		IoDeleteDevice( pDevObj );
		return status;
	}
	return STATUS_SUCCESS;
}
/************************************************************************
* 函数名称:HelloDDKUnload
* 功能描述:负责驱动程序的卸载操作
* 参数列表:
      pDriverObject:驱动对象
* 返回 值:返回状态
*************************************************************************/
#pragma PAGEDCODE
VOID HelloDDKUnload (IN PDRIVER_OBJECT pDriverObject) 
{
	PDEVICE_OBJECT	pNextObj;
	KdPrint(("Enter DriverUnload\n"));
	pNextObj = pDriverObject->DeviceObject;
	//while (pNextObj != NULL) 
	//{
	//	PDEVICE_EXTENSION pDevExt = (PDEVICE_EXTENSION)
	//		pNextObj->DeviceExtension;
	//	//删除符号链接
	//	UNICODE_STRING pLinkName = pDevExt->ustrSymLinkName;
	//	IoDeleteSymbolicLink(&pLinkName);
	//	pNextObj = pNextObj->NextDevice;
	//	IoDeleteDevice( pDevExt->pDevice );
	//}
	UNICODE_STRING symLinkName;
	RtlInitUnicodeString(&symLinkName, L"\\??\\HelloDDK");
	pNextObj = pDriverObject->DeviceObject;//我的第一个设备          
	IoDeleteSymbolicLink(&symLinkName);//删除符号连接          
	IoDeleteDevice(pDriverObject->DeviceObject);//删除设备  
}
/************************************************************************
* 函数名称:HelloDDKDispatchRoutin
* 功能描述:对读IRP进行处理
* 参数列表:
      pDevObj:功能设备对象
      pIrp:从IO请求包
* 返回 值:返回状态
*************************************************************************/
#pragma PAGEDCODE
NTSTATUS HelloDDKDispatchRoutin(IN PDEVICE_OBJECT pDevObj,IN PIRP pIrp) 
{
	KdPrint(("Enter HelloDDKDispatchRoutin\n"));
	PIO_STACK_LOCATION stack = IoGetCurrentIrpStackLocation(pIrp);
	//建立一个字符串数组与IRP类型对应起来
	static char* irpname[] = 
	{
		"IRP_MJ_CREATE",
		"IRP_MJ_CREATE_NAMED_PIPE",
		"IRP_MJ_CLOSE",
		"IRP_MJ_READ",
		"IRP_MJ_WRITE",
		"IRP_MJ_QUERY_INFORMATION",
		"IRP_MJ_SET_INFORMATION",
		"IRP_MJ_QUERY_EA",
		"IRP_MJ_SET_EA",
		"IRP_MJ_FLUSH_BUFFERS",
		"IRP_MJ_QUERY_VOLUME_INFORMATION",
		"IRP_MJ_SET_VOLUME_INFORMATION",
		"IRP_MJ_DIRECTORY_CONTROL",
		"IRP_MJ_FILE_SYSTEM_CONTROL",
		"IRP_MJ_DEVICE_CONTROL",
		"IRP_MJ_INTERNAL_DEVICE_CONTROL",
		"IRP_MJ_SHUTDOWN",
		"IRP_MJ_LOCK_CONTROL",
		"IRP_MJ_CLEANUP",
		"IRP_MJ_CREATE_MAILSLOT",
		"IRP_MJ_QUERY_SECURITY",
		"IRP_MJ_SET_SECURITY",
		"IRP_MJ_POWER",
		"IRP_MJ_SYSTEM_CONTROL",
		"IRP_MJ_DEVICE_CHANGE",
		"IRP_MJ_QUERY_QUOTA",
		"IRP_MJ_SET_QUOTA",
		"IRP_MJ_PNP",
	};

	UCHAR type = stack->MajorFunction;
	if (type >= arraysize(irpname))
		KdPrint((" - Unknown IRP, major type %X\n", type));
	else
		KdPrint(("\t%s\n", irpname[type]));
	NTSTATUS status = STATUS_SUCCESS;
	// 完成IRP
	pIrp->IoStatus.Status = status;
	pIrp->IoStatus.Information = 0;	// bytes xfered
	IoCompleteRequest( pIrp, IO_NO_INCREMENT );
	KdPrint(("Leave HelloDDKDispatchRoutin\n"));
	return status;
}
#pragma PAGEDCODE
NTSTATUS HelloDDKDeviceIOControl(IN PDEVICE_OBJECT pDevObj,IN PIRP pIrp)
{
	NTSTATUS status = STATUS_SUCCESS;
	KdPrint(("Enter HelloDDKDeviceIOControl\n"));
	//得到当前堆栈
	PIO_STACK_LOCATION stack = IoGetCurrentIrpStackLocation(pIrp);
	//得到输入缓冲区大小
	ULONG cbin = stack->Parameters.DeviceIoControl.InputBufferLength;
	//得到输出缓冲区大小
	ULONG cbout = stack->Parameters.DeviceIoControl.OutputBufferLength;
	//得到IOCTL码
	ULONG code = stack->Parameters.DeviceIoControl.IoControlCode;
	PDEVICE_EXTENSION pDevExt = (PDEVICE_EXTENSION)pDevObj->DeviceExtension;
	ULONG info = 0;
	switch (code)
	{						// process request
		case IOCTL_START_TIMER:
		{
			KdPrint(("IOCTL_START_TIMER\n"));
			pDevExt->lTimerCount = TIMER_OUT;//时间间隔3秒
			IoStartTimer(pDevObj);
			break;
		}
		case IOCTL_STOP:
		{
			KdPrint(("IOCTL_STOP\n"));
			IoStopTimer(pDevObj);
			break;
		}
		default:
			status = STATUS_INVALID_VARIANT;
	}
	// 完成IRP
	pIrp->IoStatus.Status = status;
	pIrp->IoStatus.Information = info;	// bytes xfered
	IoCompleteRequest( pIrp, IO_NO_INCREMENT );
	KdPrint(("Leave HelloDDKDeviceIOControl\n"));
	return status;
}