win10驱动开发19—

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这篇文章

#include <windows.h>
#include <stdio.h>void LpoverlappedCompletionRoutine(__in     DWORD dwErrorCode,__in      DWORD dwNumberOfBytesTransfered,__out  LPOVERLAPPED lpOverlapped
)
{printf("已经完成了读操作\n");
}
//同步
VOID Syn()
{HANDLE hFile = CreateFile(TEXT("test.txt"),GENERIC_ALL,FILE_SHARE_READ | FILE_SHARE_WRITE,NULL,OPEN_ALWAYS,//存在打开不存在创建打开FILE_ATTRIBUTE_NORMAL ,NULL);if (hFile == INVALID_HANDLE_VALUE){printf("文件打开失败%d\n", GetLastError());}DWORD dwret;WriteFile(hFile, "这是同步操作", strlen("这是同步操作"), &dwret, NULL);CloseHandle(hFile);
}
//异步
VOID Asy()
{HANDLE hFile = CreateFile(TEXT("test.txt"),GENERIC_ALL,FILE_SHARE_READ | FILE_SHARE_WRITE,NULL,OPEN_ALWAYS,//存在打开不存在创建打开FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED,//加上就是一部NULL);if (hFile == INVALID_HANDLE_VALUE){printf("文件打开失败%d\n", GetLastError());}DWORD dwret;OVERLAPPED ol = {NULL};ol.hEvent = CreateEvent(NULL,FALSE,FALSE,NULL);WriteFile(hFile, "这是异步操作", strlen("这是异步操作"), &dwret, &ol);WaitForSingleObject(ol.hEvent, INFINITE);char Buffer[1024] = { 0 };ReadFileEx(hFile, Buffer, sizeof(Buffer), &ol, LpoverlappedCompletionRoutine);SleepEx(INFINITE, TRUE);printf("%s\n", Buffer);printf("结束\n");CloseHandle(hFile);
}
int main()
{Syn();Asy();
}

内核层

#include <ntddk.h>   LIST_ENTRY listHead;VOID Unload(IN PDRIVER_OBJECT pDriverObject)
{UNICODE_STRING SymbolicLinkName = RTL_CONSTANT_STRING(L"\\??\\HelloDDK");IoDeleteSymbolicLink(&SymbolicLinkName);//删除连接IoDeleteDevice(pDriverObject->DeviceObject);//释放驱动对象//驱动卸载的时候显示KdPrint(("Goodbye driver\n"));
}NTSTATUS Create(IN PDEVICE_OBJECT deviceObject, IN PIRP Irp)
{Irp->IoStatus.Status = STATUS_SUCCESS;//设置返回状态，告诉操作是成功还是失败Irp->IoStatus.Information = 0;IoCompleteRequest(Irp, IO_NO_INCREMENT);//是不改变return STATUS_SUCCESS;
}NTSTATUS Read(IN PDEVICE_OBJECT deviceObject, IN PIRP Irp)
{KdPrint(("进入Read\n"));if (Irp->PendingReturned){//这段代码不知道怎么进来IoMarkIrpPending(Irp);//保证irp不会释放InsertHeadList(&listHead, &Irp->Tail.Overlay.ListEntry);}else {Irp->IoStatus.Status = STATUS_SUCCESS;//设置返回状态，告诉操作是成功还是失败Irp->IoStatus.Information = 0;IoCompleteRequest(Irp, IO_NO_INCREMENT);KdPrint(("else\n"));}KdPrint(("离开Read\n"));return STATUS_SUCCESS;
}NTSTATUS Cleanup(IN PDEVICE_OBJECT deviceObject, IN PIRP Irp)
{KdPrint(("进入Cleanup\n"));while (!IsListEmpty(&listHead)){PLIST_ENTRY pEntry = RemoveHeadList(&listHead);PIRP pendingIrp=CONTAINING_RECORD(pEntry, IRP, Tail.Overlay.ListEntry);pendingIrp->IoStatus.Status = STATUS_SUCCESS;//设置返回状态，告诉操作是成功还是失败pendingIrp->IoStatus.Information = 0;IoCompleteRequest(pendingIrp, IO_NO_INCREMENT);}Irp->IoStatus.Status = STATUS_SUCCESS;//设置返回状态，告诉操作是成功还是失败Irp->IoStatus.Information = 0;IoCompleteRequest(Irp, IO_NO_INCREMENT);KdPrint(("离开Cleanup\n"));return STATUS_SUCCESS;
}NTSTATUS Close(IN PDEVICE_OBJECT deviceObject, IN PIRP Irp)
{KdPrint(("进入Close\n"));Irp->IoStatus.Status = STATUS_SUCCESS;//设置返回状态，告诉操作是成功还是失败Irp->IoStatus.Information = 0;IoCompleteRequest(Irp, IO_NO_INCREMENT);//是不改变KdPrint(("离开Close\n"));return STATUS_SUCCESS;
}NTSTATUS DriverEntry(IN PDRIVER_OBJECT DriverObject, IN PUNICODE_STRING RegistryPath
)
{KdPrint(("hello driver\n"));UNICODE_STRING DeviceName = RTL_CONSTANT_STRING(L"\\Device\\HelloDDK");UNICODE_STRING SymbolicLinkName = RTL_CONSTANT_STRING(L"\\??\\HelloDDK");NTSTATUS status;PDEVICE_OBJECT DeviceObject;DriverObject->DriverUnload = Unload;DriverObject->MajorFunction[IRP_MJ_CREATE] = Create;DriverObject->MajorFunction[IRP_MJ_READ] = Read;DriverObject->MajorFunction[IRP_MJ_CLEANUP] = Cleanup;DriverObject->MajorFunction[IRP_MJ_CLOSE] = Close;status = IoCreateDevice(DriverObject, 0, &DeviceName, FILE_DEVICE_UNKNOWN, 0, FALSE, &DeviceObject);if (!NT_SUCCESS(status)){KdPrint(("创建设备失败%x\n", status));return status;}status = IoCreateSymbolicLink(&SymbolicLinkName, &DeviceName);if (!NT_SUCCESS(status)){KdPrint(("符号连接创建失败%x\n", status));IoDeleteDevice(DeviceObject);return status;}DeviceObject->Flags |= DO_BUFFERED_IO; //DeviceObject->Flags &= ~DO_DEVICE_INITIALIZING;InitializeListHead(&listHead);return STATUS_SUCCESS;
}

应用层

#include <windows.h>
#include <stdio.h>
#include <winioctl.h>
int main()
{HANDLE hDevice = CreateFile(TEXT("\\\\.\\HelloDDK"),GENERIC_ALL,FILE_SHARE_READ | FILE_SHARE_WRITE,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL|FILE_FLAG_OVERLAPPED,//FILE_FLAG_OVERLAPPED 代表异步  FILE_ATTRIBUTE_NORMAL代表同步NULL);if (hDevice == INVALID_HANDLE_VALUE){printf("设备打开失败%d\n", GetLastError());return -1;}DWORD dwRet;//注意异步操作必须加 OVERLAPPED ol = { NULL }标识 否则不是异步操作将会一直等待上一个ReadFile完成才执行下一个ReadFileOVERLAPPED ol = { NULL };for (int i=0;i<2;i++){ReadFile(hDevice, NULL, 0, &dwRet, &ol);}CloseHandle(hDevice);return 0;
}

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