3 * Copyright (C) 1998, 1999, 2000, 2001 ReactOS Team
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 * PROJECT: ReactOS kernel
22 * FILE: ntoskrnl/io/cancel.c
23 * PURPOSE: Cancel routine
24 * PROGRAMMER: David Welch (welch@mcmail.com)
29 /* INCLUDES *****************************************************************/
31 #include <ddk/ntddk.h>
34 #include <internal/debug.h>
36 /* GLOBALS *******************************************************************/
38 static KSPIN_LOCK CancelSpinLock;
40 /* FUNCTIONS *****************************************************************/
43 NtCancelIoFile (IN HANDLE FileHandle,
44 OUT PIO_STATUS_BLOCK IoStatusBlock)
47 return(STATUS_NOT_IMPLEMENTED);
55 DPRINT("IoCancelIrp(Irp %x)\n",Irp);
57 IoAcquireCancelSpinLock(&oldlvl);
59 if (Irp->CancelRoutine == NULL)
61 IoReleaseCancelSpinLock(oldlvl);
64 Irp->CancelIrql = oldlvl;
65 Irp->CancelRoutine(IoGetCurrentIrpStackLocation(Irp)->DeviceObject, Irp);
70 IoInitCancelHandling(VOID)
72 KeInitializeSpinLock(&CancelSpinLock);
76 IoAcquireCancelSpinLock(PKIRQL Irql)
78 KeAcquireSpinLock(&CancelSpinLock,Irql);
82 IoReleaseCancelSpinLock(KIRQL Irql)
84 KeReleaseSpinLock(&CancelSpinLock,Irql);