/*
   *   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 */