//

// Mutex_POSIX.h

//

// Library: Foundation

// Package: Threading

// Module:  Mutex

//

// Definition of the MutexImpl and FastMutexImpl classes for POSIX Threads.

//

// Copyright (c) 2004-2008, Applied Informatics Software Engineering GmbH.

// and Contributors.

//

// SPDX-License-Identifier: BSL-1.0

//

#ifndef Foundation_Mutex_POSIX_INCLUDED

#define Foundation_Mutex_POSIX_INCLUDED

#include "Poco/Foundation.h"

#include "Poco/Exception.h"

#include "Poco/Error.h"

#include <pthread.h>

namespace Poco {

class Foundation_API MutexImpl

{

protected:

  MutexImpl();

  MutexImpl(bool fast);

  ~MutexImpl();

  void lockImpl();

  bool tryLockImpl();

  bool tryLockImpl(long milliseconds);

  void unlockImpl();

private:

  pthread_mutex_t _mutex;

};

class Foundation_API FastMutexImpl: public MutexImpl

{

protected:

  FastMutexImpl();

  ~FastMutexImpl();

};

//

// inlines

//

inline void MutexImpl::lockImpl()

{

  int rc;

  if ((rc = pthread_mutex_lock(&_mutex)))

    throw SystemException("cannot lock mutex", Error::getMessage(rc));

}

inline bool MutexImpl::tryLockImpl()

{

  int rc = pthread_mutex_trylock(&_mutex);

  if (rc == 0)

    return true;

  else if (rc == EBUSY)

    return false;

  else

    throw SystemException("cannot lock mutex", Error::getMessage(rc));

}

inline void MutexImpl::unlockImpl()

{

  int rc;

  if ((rc = pthread_mutex_unlock(&_mutex)))

    throw SystemException("cannot unlock mutex", Error::getMessage(rc));

}

} // namespace Poco

#endif // Foundation_Mutex_POSIX_INCLUDED