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/*-
* Copyright (c) 2009-2010 The FreeBSD Foundation
* All rights reserved.
*
* This software was developed by Pawel Jakub Dawidek under sponsorship from
* the FreeBSD Foundation.
*
* 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, 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 AUTHORS AND CONTRIBUTORS ``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 AUTHORS OR CONTRIBUTORS 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 _SYNCH_H_
#define _SYNCH_H_
#include <errno.h>
#include <pthread.h>
#include <pthread_np.h>
#include <stdbool.h>
#include <time.h>
#include <pjdlog.h>
#ifndef PJDLOG_ASSERT
#include <assert.h>
#define PJDLOG_ASSERT(...) assert(__VA_ARGS__)
#endif
static __inline void
mtx_init(pthread_mutex_t *lock) __requires_unlocked(*lock)
{
int error;
error = pthread_mutex_init(lock, NULL);
PJDLOG_ASSERT(error == 0);
}
static __inline void
mtx_destroy(pthread_mutex_t *lock) __requires_unlocked(*lock)
{
int error;
error = pthread_mutex_destroy(lock);
PJDLOG_ASSERT(error == 0);
}
static __inline void
mtx_lock(pthread_mutex_t *lock) __locks_exclusive(*lock)
{
int error;
error = pthread_mutex_lock(lock);
PJDLOG_ASSERT(error == 0);
}
static __inline bool
mtx_trylock(pthread_mutex_t *lock) __trylocks_exclusive(true, *lock)
{
int error;
error = pthread_mutex_trylock(lock);
PJDLOG_ASSERT(error == 0 || error == EBUSY);
return (error == 0);
}
static __inline void
mtx_unlock(pthread_mutex_t *lock) __unlocks(*lock)
{
int error;
error = pthread_mutex_unlock(lock);
PJDLOG_ASSERT(error == 0);
}
static __inline bool
mtx_owned(pthread_mutex_t *lock)
{
return (pthread_mutex_isowned_np(lock) != 0);
}
static __inline void
rw_init(pthread_rwlock_t *lock) __requires_unlocked(*lock)
{
int error;
error = pthread_rwlock_init(lock, NULL);
PJDLOG_ASSERT(error == 0);
}
static __inline void
rw_destroy(pthread_rwlock_t *lock) __requires_unlocked(*lock)
{
int error;
error = pthread_rwlock_destroy(lock);
PJDLOG_ASSERT(error == 0);
}
static __inline void
rw_rlock(pthread_rwlock_t *lock) __locks_shared(*lock)
{
int error;
error = pthread_rwlock_rdlock(lock);
PJDLOG_ASSERT(error == 0);
}
static __inline void
rw_wlock(pthread_rwlock_t *lock) __locks_exclusive(*lock)
{
int error;
error = pthread_rwlock_wrlock(lock);
PJDLOG_ASSERT(error == 0);
}
static __inline void
rw_unlock(pthread_rwlock_t *lock) __unlocks(*lock)
{
int error;
error = pthread_rwlock_unlock(lock);
PJDLOG_ASSERT(error == 0);
}
static __inline void
cv_init(pthread_cond_t *cv)
{
pthread_condattr_t attr;
int error;
error = pthread_condattr_init(&attr);
PJDLOG_ASSERT(error == 0);
error = pthread_condattr_setclock(&attr, CLOCK_MONOTONIC);
PJDLOG_ASSERT(error == 0);
error = pthread_cond_init(cv, &attr);
PJDLOG_ASSERT(error == 0);
error = pthread_condattr_destroy(&attr);
PJDLOG_ASSERT(error == 0);
}
static __inline void
cv_wait(pthread_cond_t *cv, pthread_mutex_t *lock) __requires_exclusive(*lock)
{
int error;
error = pthread_cond_wait(cv, lock);
PJDLOG_ASSERT(error == 0);
}
static __inline bool
cv_timedwait(pthread_cond_t *cv, pthread_mutex_t *lock, int timeout)
__requires_exclusive(*lock)
{
struct timespec ts;
int error;
if (timeout == 0) {
cv_wait(cv, lock);
return (false);
}
error = clock_gettime(CLOCK_MONOTONIC, &ts);
PJDLOG_ASSERT(error == 0);
ts.tv_sec += timeout;
error = pthread_cond_timedwait(cv, lock, &ts);
PJDLOG_ASSERT(error == 0 || error == ETIMEDOUT);
return (error == ETIMEDOUT);
}
static __inline void
cv_signal(pthread_cond_t *cv)
{
int error;
error = pthread_cond_signal(cv);
PJDLOG_ASSERT(error == 0);
}
static __inline void
cv_broadcast(pthread_cond_t *cv)
{
int error;
error = pthread_cond_broadcast(cv);
PJDLOG_ASSERT(error == 0);
}
#endif /* !_SYNCH_H_ */
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