www.pudn.com > wave-bulktransfer.rar > TestPower.c

#include "usbdriver.h" 
 
NTSTATUS TestPowerIrp(IN PDEVICE_OBJECT fdo,IN PIRP Irp) 
{ 
	NTSTATUS ntStatus; 
	PIO_STACK_LOCATION IrpStack, NextStack; 
    PDEVICE_EXTENSION pdx; 
 
    pdx = fdo->DeviceExtension; 
  
    Irp->IoStatus.Status = STATUS_SUCCESS; 
    Irp->IoStatus.Information = 0; 
    IrpStack = IoGetCurrentIrpStackLocation (Irp); 
 
    switch (IrpStack->MinorFunction) { 
		case IRP_MN_SET_POWER: 
			switch (IrpStack->Parameters.Power.Type) { 
				case SystemPowerState: 
					break;  
                case DevicePowerState: 
					switch (IrpStack->Parameters.Power.State.DeviceState) { 
						case PowerDeviceD3: 
							break; 
                        case PowerDeviceD2: 
							break; 
                        case PowerDeviceD1: 
                            break; 
                        case PowerDeviceD0: 
                            break; 
					} 
                break;  
			} 
         break;   
         case IRP_MN_QUERY_POWER: 
             switch (IrpStack->Parameters.Power.Type) { 
            case SystemPowerState: 
				break;  
            case DevicePowerState: 
				switch (IrpStack->Parameters.Power.State.DeviceState) { 
					case PowerDeviceD2:                     
						break; 
                    case PowerDeviceD1: 
                         break; 
                    case PowerDeviceD3: 
                         break; 
				}  
               break;  
			 } 
         break;  
         default: 
			 ; 
	}  
    NextStack = IoGetNextIrpStackLocation(Irp); 
    RtlCopyMemory(NextStack, IrpStack, sizeof(IO_STACK_LOCATION)); 
 
    ntStatus = IoCallDriver(pdx->LowerDeviceObject, Irp); 
 
	if (ntStatus == STATUS_PENDING) { 
	   IoMarkIrpPending(Irp); 
   } 
   return ntStatus; 
}