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/*
* Copyright 2008-2013 Various Authors
* Copyright 2004 Timo Hirvonen
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef CMUS_LOCKING_H
#define CMUS_LOCKING_H
#include <pthread.h>
#include <stdatomic.h>
struct fifo_mutex {
struct fifo_waiter * _Atomic tail;
struct fifo_waiter *head;
pthread_mutex_t mutex;
};
extern pthread_t main_thread;
#define CMUS_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER
#define CMUS_COND_INITIALIZER PTHREAD_COND_INITIALIZER
#define CMUS_RWLOCK_INITIALIZER PTHREAD_RWLOCK_INITIALIZER
#define FIFO_MUTEX_INITIALIZER { \
.mutex = PTHREAD_MUTEX_INITIALIZER, \
.tail = ATOMIC_VAR_INIT(NULL), \
}
void cmus_mutex_lock(pthread_mutex_t *mutex);
void cmus_mutex_unlock(pthread_mutex_t *mutex);
void cmus_rwlock_rdlock(pthread_rwlock_t *lock);
void cmus_rwlock_wrlock(pthread_rwlock_t *lock);
void cmus_rwlock_unlock(pthread_rwlock_t *lock);
void fifo_mutex_lock(struct fifo_mutex *fifo);
void fifo_mutex_unlock(struct fifo_mutex *fifo);
void fifo_mutex_yield(struct fifo_mutex *fifo);
#endif
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