diff options
Diffstat (limited to 'sys/compat/linuxkpi/common/include/linux/mutex.h')
-rw-r--r-- | sys/compat/linuxkpi/common/include/linux/mutex.h | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/sys/compat/linuxkpi/common/include/linux/mutex.h b/sys/compat/linuxkpi/common/include/linux/mutex.h new file mode 100644 index 0000000..aee34cf --- /dev/null +++ b/sys/compat/linuxkpi/common/include/linux/mutex.h @@ -0,0 +1,64 @@ +/*- + * Copyright (c) 2010 Isilon Systems, Inc. + * Copyright (c) 2010 iX Systems, Inc. + * Copyright (c) 2010 Panasas, Inc. + * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice unmodified, this list of conditions, and the following + * disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * $FreeBSD$ + */ +#ifndef _LINUX_MUTEX_H_ +#define _LINUX_MUTEX_H_ + +#include <sys/param.h> +#include <sys/lock.h> +#include <sys/sx.h> + +#include <linux/spinlock.h> + +typedef struct mutex { + struct sx sx; +} mutex_t; + +#define mutex_lock(_m) sx_xlock(&(_m)->sx) +#define mutex_lock_nested(_m, _s) mutex_lock(_m) +#define mutex_lock_interruptible(_m) ({ mutex_lock((_m)); 0; }) +#define mutex_unlock(_m) sx_xunlock(&(_m)->sx) +#define mutex_trylock(_m) !!sx_try_xlock(&(_m)->sx) + +#define DEFINE_MUTEX(lock) \ + mutex_t lock; \ + SX_SYSINIT_FLAGS(lock, &(lock).sx, "lnxmtx", SX_NOWITNESS) + +static inline void +linux_mutex_init(mutex_t *m) +{ + + memset(&m->sx, 0, sizeof(m->sx)); + sx_init_flags(&m->sx, "lnxmtx", SX_NOWITNESS); +} + +#define mutex_init linux_mutex_init + +#endif /* _LINUX_MUTEX_H_ */ |