createclose.c

老外写的一个相当不错的虚拟显示器驱动

#include "Driver.h"


#ifdef ALLOC_PRAGMA
#pragma alloc_text (PAGE, DispatchCreate)
#pragma alloc_text (PAGE, DispatchClose)
#endif


/*************************************************************************************************/
NTSTATUS DispatchCreate(IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp)
{
	Irp->IoStatus.Information = 0;
	Irp->IoStatus.Status = STATUS_SUCCESS;
	IoCompleteRequest(Irp, IO_NO_INCREMENT);

	return STATUS_SUCCESS;
}


/*************************************************************************************************/
NTSTATUS DispatchClose(IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp)
{
    PFDO_DATA deviceExtension = (PFDO_DATA)DeviceObject->DeviceExtension;
	PIRP CancelIrp;

	while (CancelIrp = IoCsqRemoveNextIrp(&deviceExtension->CSReadQueue, NULL))
	{
		CancelIrp->IoStatus.Information = 0;
		CancelIrp->IoStatus.Status = STATUS_CANCELLED;
		IoCompleteRequest(CancelIrp, IO_NO_INCREMENT);
	}

	Irp->IoStatus.Information = 0;
	Irp->IoStatus.Status = STATUS_SUCCESS;
	IoCompleteRequest(Irp, IO_NO_INCREMENT);

	return STATUS_SUCCESS;
}