/*
 * @project      The CERN Tape Archive (CTA)
 * @copyright    Copyright © 2021-2022 CERN
 * @license      This program is free software, distributed under the terms of the GNU General Public
 *               Licence version 3 (GPL Version 3), copied verbatim in the file "COPYING". You can
 *               redistribute it and/or modify it under the terms of the GPL Version 3, 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.
 *
 *               In applying this licence, CERN does not waive the privileges and immunities
 *               granted to it by virtue of its status as an Intergovernmental Organization or
 *               submit itself to any jurisdiction.
 */

#include "common/threading/Mutex.hpp"
#include "common/exception/Errnum.hpp"
#include "common/exception/Exception.hpp"

namespace cta::threading {

//------------------------------------------------------------------------------
//constructor
//------------------------------------------------------------------------------
Mutex::Mutex()  {
  pthread_mutexattr_t attr;
  cta::exception::Errnum::throwOnReturnedErrno(
    pthread_mutexattr_init(&attr),
    "Error from pthread_mutexattr_init in cta::threading::Mutex::Mutex()");
  cta::exception::Errnum::throwOnReturnedErrno(
    pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK),
    "Error from pthread_mutexattr_settype in cta::threading::Mutex::Mutex()");
  cta::exception::Errnum::throwOnReturnedErrno(
    pthread_mutex_init(&m_mutex, &attr),
    "Error from pthread_mutex_init in cta::threading::Mutex::Mutex()");
  try {
    cta::exception::Errnum::throwOnReturnedErrno(
      pthread_mutexattr_destroy(&attr),
      "Error from pthread_mutexattr_destroy in cta::threading::Mutex::Mutex()");
  } catch (...) {
    pthread_mutex_destroy(&m_mutex);
    throw;
  }
}
//------------------------------------------------------------------------------
//destructor
//------------------------------------------------------------------------------
Mutex::~Mutex() {
  pthread_mutex_destroy(&m_mutex);
}
//------------------------------------------------------------------------------
//lock
//------------------------------------------------------------------------------
void Mutex::lock()  {
  cta::exception::Errnum::throwOnReturnedErrno(
    pthread_mutex_lock(&m_mutex),
    "Error from pthread_mutex_lock in cta::threading::Mutex::lock()");
}
//------------------------------------------------------------------------------
//unlock
//------------------------------------------------------------------------------
void Mutex::unlock()  {
  cta::exception::Errnum::throwOnReturnedErrno(
  pthread_mutex_unlock(&m_mutex),
          "Error from pthread_mutex_unlock in cta::threading::Mutex::unlock()");
}

} // namespace cta::threading