blob: 70ac9f7d1e00c22064dcc43ff3d923820ce1048c [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Copyright (c) International Business Machines Corp., 2000-2001
3 * Portions Copyright (c) Christoph Hellwig, 2001-2002
4 *
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.
9 *
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
13 * the GNU General Public License for more details.
14 *
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19#ifndef _H_JFS_LOCK
20#define _H_JFS_LOCK
21
22#include <linux/spinlock.h>
Ingo Molnar1de87442006-01-24 15:22:50 -060023#include <linux/mutex.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include <linux/sched.h>
25
26/*
27 * jfs_lock.h
28 */
29
30/*
31 * Conditional sleep where condition is protected by spinlock
32 *
33 * lock_cmd and unlock_cmd take and release the spinlock
34 */
35#define __SLEEP_COND(wq, cond, lock_cmd, unlock_cmd) \
36do { \
37 DECLARE_WAITQUEUE(__wait, current); \
38 \
39 add_wait_queue(&wq, &__wait); \
40 for (;;) { \
41 set_current_state(TASK_UNINTERRUPTIBLE);\
42 if (cond) \
43 break; \
44 unlock_cmd; \
45 schedule(); \
46 lock_cmd; \
47 } \
48 current->state = TASK_RUNNING; \
49 remove_wait_queue(&wq, &__wait); \
50} while (0)
51
52#endif /* _H_JFS_LOCK */