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/*

 *   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/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;                             \

                schedule();                             \

                lock_cmd;                               \

        }                                               \

        current->state = TASK_RUNNING;                  \

        remove_wait_queue(&wq, &__wait);                \

} while (0)

#endif                          /* _H_JFS_LOCK */