[net-next-2.6.git] / fs / jfs / jfs_lock.h

/*
 *   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 */
Commit	Line	Data
1da177e4	1	/*
63f83c9f DK	2	* Copyright (C) International Business Machines Corp., 2000-2001
63f83c9f DK	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; \
1da177e4 LT	47	} \
3cbb1c8e	48	__set_current_state(TASK_RUNNING); \
1da177e4 LT	49	remove_wait_queue(&wq, &__wait); \
	50	} while (0)
	51
	52	#endif /* _H_JFS_LOCK */