diff options
Diffstat (limited to 'sys/compat/linuxkpi/common/include/linux/semaphore.h')
-rw-r--r-- | sys/compat/linuxkpi/common/include/linux/semaphore.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/sys/compat/linuxkpi/common/include/linux/semaphore.h b/sys/compat/linuxkpi/common/include/linux/semaphore.h new file mode 100644 index 0000000..022a016 --- /dev/null +++ b/sys/compat/linuxkpi/common/include/linux/semaphore.h @@ -0,0 +1,69 @@ +/*- + * 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_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_ */ |