/**
 * SPDX-FileCopyrightText: 2023-2024 Sebastien Jodogne, UCLouvain, Belgium
 * SPDX-License-Identifier: GPL-3.0-or-later
 */

/**
 * Java plugin for Orthanc
 * Copyright (C) 2023-2024 Sebastien Jodogne, UCLouvain, Belgium
 *
 * 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 3 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/>.
 **/


#include "Mutex.h"

#include <stdexcept>

#if defined(_WIN32)

#  include <windows.h>

struct Mutex::PImpl
{
  CRITICAL_SECTION criticalSection_;
};

Mutex::Mutex()
{
  pimpl_ = new PImpl;
  ::InitializeCriticalSection(&pimpl_->criticalSection_);
}

Mutex::~Mutex()
{
  ::DeleteCriticalSection(&pimpl_->criticalSection_);
  delete pimpl_;
}

void Mutex::Lock()
{
  ::EnterCriticalSection(&pimpl_->criticalSection_);
}

void Mutex::Unlock()
{
  ::LeaveCriticalSection(&pimpl_->criticalSection_);
}


#elif defined(__linux__) || defined(__FreeBSD_kernel__) || defined(__APPLE__) || defined(__FreeBSD__) || defined(__OpenBSD__)

#  include <pthread.h>

struct Mutex::PImpl
{
  pthread_mutex_t mutex_;
};

Mutex::Mutex()
{
  pimpl_ = new PImpl;

  if (pthread_mutex_init(&pimpl_->mutex_, NULL) != 0)
  {
    delete pimpl_;
    throw std::runtime_error("Cannot create mutex");
  }
}

Mutex::~Mutex()
{
  pthread_mutex_destroy(&pimpl_->mutex_);
  delete pimpl_;
}

void Mutex::Lock()
{
  if (pthread_mutex_lock(&pimpl_->mutex_) != 0)
  {
    throw std::runtime_error("Cannot lock mutex");
  }
}

void Mutex::Unlock()
{
  if (pthread_mutex_unlock(&pimpl_->mutex_) != 0)
  {
    throw std::runtime_error("Cannot unlock mutex");
  }
}

#else
#  error Support your plateform here
#endif