/* SPDX-License-Identifier: BSD-2-Clause */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

/**
 * @file
 *
 * @ingroup POSIXAPI
 *
 * @brief Pthread Get/Set Concurrency
 *
 * Per the Open Group specification, when user pthreads are mapped 1:1
 * onto kernel threads, the implementation simply tracks an internal
 * variable whose initial value is 0. If it is set, subsequent calls to
 * obtain the value return that previously set.
 */

/*
 *  COPYRIGHT (c) 2016.
 *  On-Line Applications Research Corporation (OAR).
 *
 * 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 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 OWNER 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.
 */

#include <pthread.h>
#include <errno.h>

static int pthread_concurrency_level;

int pthread_getconcurrency(void)
{
  return pthread_concurrency_level;
}

int pthread_setconcurrency(
  int new_level
)
{
  pthread_concurrency_level = new_level;
  return 0;
}