| /* |
| * Copyright (C) International Business Machines Corp., 2000-2001 |
| * Portions Copyright (C) Christoph Hellwig, 2001-2002 |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| * the GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| #ifndef _H_JFS_LOCK |
| #define _H_JFS_LOCK |
| |
| #include <linux/spinlock.h> |
| #include <linux/mutex.h> |
| #include <linux/sched.h> |
| |
| /* |
| * jfs_lock.h |
| */ |
| |
| /* |
| * Conditional sleep where condition is protected by spinlock |
| * |
| * lock_cmd and unlock_cmd take and release the spinlock |
| */ |
| #define __SLEEP_COND(wq, cond, lock_cmd, unlock_cmd) \ |
| do { \ |
| DECLARE_WAITQUEUE(__wait, current); \ |
| \ |
| add_wait_queue(&wq, &__wait); \ |
| for (;;) { \ |
| set_current_state(TASK_UNINTERRUPTIBLE);\ |
| if (cond) \ |
| break; \ |
| unlock_cmd; \ |
| io_schedule(); \ |
| lock_cmd; \ |
| } \ |
| __set_current_state(TASK_RUNNING); \ |
| remove_wait_queue(&wq, &__wait); \ |
| } while (0) |
| |
| #endif /* _H_JFS_LOCK */ |