Mutex.h

/*
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * Mutex.h
 * A thread object.
 * Copyright (C) 2010 Simon Newton
 */

#ifndef INCLUDE_OLA_THREAD_MUTEX_H_
#define INCLUDE_OLA_THREAD_MUTEX_H_

#include <pthread.h>
#include <ola/Clock.h>

namespace ola {
namespace thread {


class Mutex {
 public:
 friend class ConditionVariable;

 Mutex();
 ~Mutex();

 void Lock();
 bool TryLock();
 void Unlock();

 private:
 pthread_mutex_t m_mutex;

 Mutex(const Mutex&);
 Mutex& operator=(const Mutex&);
};


class MutexLocker {
 public:
 explicit MutexLocker(Mutex *mutex);
 ~MutexLocker();

 private:
 Mutex *m_mutex;

 MutexLocker(const MutexLocker&);
 MutexLocker& operator=(const MutexLocker&);
};


class ConditionVariable {
 public:
 ConditionVariable();
 ~ConditionVariable();

 void Wait(Mutex *mutex);
 bool TimedWait(Mutex *mutex, const ola::TimeStamp &wake_up_time);

 void Signal();
 void Broadcast();

 private:
 pthread_cond_t m_condition;

 ConditionVariable(const ConditionVariable&);
 ConditionVariable& operator=(const ConditionVariable&);
};
} // namespace thread
} // namespace ola
#endif // INCLUDE_OLA_THREAD_MUTEX_H_