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sys/compat/linuxkpi/3.15/include/linux/semaphore.h
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/*- | |||||
* 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. | |||||
*/ | |||||
#ifndef _LINUX_SEMAPHORE_H_ | |||||
#define _LINUX_SEMAPHORE_H_ | |||||
#include <sys/param.h> | |||||
#include <sys/lock.h> | |||||
#include <sys/sema.h> | |||||
/* | |||||
* XXX BSD semaphores are disused and slow. They also do not provide a | |||||
* sema_wait_sig method. This must be resolved eventually. | |||||
*/ | |||||
struct semaphore { | |||||
struct sema sema; | |||||
}; | |||||
#define down(_sem) sema_wait(&(_sem)->sema) | |||||
#define down_interruptible(_sem) sema_wait(&(_sem)->sema), 0 | |||||
#define down_trylock(_sem) !sema_trywait(&(_sem)->sema) | |||||
#define up(_sem) sema_post(&(_sem)->sema) | |||||
static inline void | |||||
linux_sema_init(struct semaphore *sem, int val) | |||||
{ | |||||
memset(&sem->sema, 0, sizeof(sem->sema)); | |||||
sema_init(&sem->sema, val, "lnxsema"); | |||||
} | |||||
static inline void | |||||
init_MUTEX(struct semaphore *sem) | |||||
{ | |||||
memset(&sem->sema, 0, sizeof(sem->sema)); | |||||
sema_init(&sem->sema, 1, "lnxsema"); | |||||
} | |||||
#define sema_init linux_sema_init | |||||
#endif /* _LINUX_SEMAPHORE_H_ */ |