/*
 * Copyright (c) 2015, Aleksey Demakov
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * * Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.
 *
 * * 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 COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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.
 */

#ifndef PTHREAD_BARRIER_H
#define PTHREAD_BARRIER_H

#include <pthread.h>

#ifdef __cplusplus
extern "C" {
#endif

#if !defined(PTHREAD_BARRIER_SERIAL_THREAD)
#define PTHREAD_BARRIER_SERIAL_THREAD (1)
#endif

#if !defined(PTHREAD_PROCESS_PRIVATE)
#define PTHREAD_PROCESS_PRIVATE (42)
#endif
#if !defined(PTHREAD_PROCESS_SHARED)
#define PTHREAD_PROCESS_SHARED (43)
#endif

typedef struct {
  pthread_mutexattr_t mattr;
  pthread_condattr_t cattr;
} pthread_barrierattr_t;

typedef struct {
  pthread_mutex_t mutex;
  pthread_cond_t cond;
  unsigned int limit;
  unsigned int count;
  unsigned int phase;
} pthread_barrier_t;

int pthread_barrierattr_init(pthread_barrierattr_t *attr);
int pthread_barrierattr_destroy(pthread_barrierattr_t *attr);

int pthread_barrierattr_getpshared(const pthread_barrierattr_t *__restrict attr,
                                   int *__restrict pshared);
int pthread_barrierattr_setpshared(pthread_barrierattr_t *attr, int pshared);

int pthread_barrier_init(pthread_barrier_t *__restrict barrier,
                         const pthread_barrierattr_t *__restrict attr,
                         unsigned int count);
int pthread_barrier_destroy(pthread_barrier_t *barrier);

int pthread_barrier_wait(pthread_barrier_t *barrier);

#ifdef __cplusplus
}
#endif

#endif /* PTHREAD_BARRIER_H */