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1da177e4 | 1 | /* |
63f83c9f DK |
2 | * Copyright (C) International Business Machines Corp., 2000-2001 |
3 | * Portions Copyright (C) Christoph Hellwig, 2001-2002 | |
1da177e4 LT |
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 | |
63f83c9f | 7 | * the Free Software Foundation; either version 2 of the License, or |
1da177e4 | 8 | * (at your option) any later version. |
63f83c9f | 9 | * |
1da177e4 LT |
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 | |
63f83c9f | 16 | * along with this program; if not, write to the Free Software |
1da177e4 LT |
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> | |
1de87444 | 23 | #include <linux/mutex.h> |
1da177e4 LT |
24 | #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) \ | |
36 | do { \ | |
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; \ | |
4aa0d230 | 45 | io_schedule(); \ |
1da177e4 LT |
46 | lock_cmd; \ |
47 | } \ | |
48 | current->state = TASK_RUNNING; \ | |
49 | remove_wait_queue(&wq, &__wait); \ | |
50 | } while (0) | |
51 | ||
52 | #endif /* _H_JFS_LOCK */ |