1219820Sjeff/*- 2219820Sjeff * Copyright (c) 2010 Isilon Systems, Inc. 3219820Sjeff * Copyright (c) 2010 iX Systems, Inc. 4219820Sjeff * Copyright (c) 2010 Panasas, Inc. 5219820Sjeff * All rights reserved. 6219820Sjeff * 7219820Sjeff * Redistribution and use in source and binary forms, with or without 8219820Sjeff * modification, are permitted provided that the following conditions 9219820Sjeff * are met: 10219820Sjeff * 1. Redistributions of source code must retain the above copyright 11219820Sjeff * notice unmodified, this list of conditions, and the following 12219820Sjeff * disclaimer. 13219820Sjeff * 2. Redistributions in binary form must reproduce the above copyright 14219820Sjeff * notice, this list of conditions and the following disclaimer in the 15219820Sjeff * documentation and/or other materials provided with the distribution. 16219820Sjeff * 17219820Sjeff * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18219820Sjeff * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19219820Sjeff * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20219820Sjeff * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21219820Sjeff * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22219820Sjeff * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23219820Sjeff * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24219820Sjeff * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25219820Sjeff * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26219820Sjeff * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27219820Sjeff */ 28219820Sjeff#ifndef _LINUX_MUTEX_H_ 29219820Sjeff#define _LINUX_MUTEX_H_ 30219820Sjeff 31219820Sjeff#include <sys/param.h> 32219820Sjeff#include <sys/lock.h> 33219820Sjeff#include <sys/sx.h> 34219820Sjeff 35219820Sjeff#include <linux/spinlock.h> 36219820Sjeff 37219820Sjefftypedef struct mutex { 38219820Sjeff struct sx sx; 39219820Sjeff} mutex_t; 40219820Sjeff 41219820Sjeff#define mutex_lock(_m) sx_xlock(&(_m)->sx) 42219820Sjeff#define mutex_lock_nested(_m, _s) mutex_lock(_m) 43219820Sjeff#define mutex_lock_interruptible(_m) ({ mutex_lock((_m)); 0; }) 44219820Sjeff#define mutex_unlock(_m) sx_xunlock(&(_m)->sx) 45219820Sjeff#define mutex_trylock(_m) !!sx_try_xlock(&(_m)->sx) 46219820Sjeff 47219820Sjeff#define DEFINE_MUTEX(lock) \ 48219820Sjeff mutex_t lock; \ 49219820Sjeff SX_SYSINIT_FLAGS(lock, &(lock).sx, "lnxmtx", SX_NOWITNESS) 50219820Sjeff 51219820Sjeffstatic inline void 52219820Sjefflinux_mutex_init(mutex_t *m) 53219820Sjeff{ 54219820Sjeff 55219820Sjeff memset(&m->sx, 0, sizeof(m->sx)); 56219820Sjeff sx_init_flags(&m->sx, "lnxmtx", SX_NOWITNESS); 57219820Sjeff} 58219820Sjeff 59219820Sjeff#define mutex_init linux_mutex_init 60219820Sjeff 61219820Sjeff#endif /* _LINUX_MUTEX_H_ */ 62