/*

 * Copyright (C) 2007 Apple Inc. All rights reserved.

 *

 * 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. 

 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of

 *     its contributors may be used to endorse or promote products derived

 *     from this software without specific prior written permission. 

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS 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 APPLE OR ITS 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.

 */

#ifndef Threading_h

#define Threading_h

#include <wtf/Noncopyable.h>

#include <pthread.h>

namespace WebCore {

class ThreadCondition;

class Mutex : Noncopyable {

friend class ThreadCondition;

public:

    Mutex() { pthread_mutex_init(&m_mutex, NULL); }

    ~Mutex() { pthread_mutex_destroy(&m_mutex); }

    int lock() { return pthread_mutex_lock(&m_mutex);}

    int tryLock() { return pthread_mutex_trylock(&m_mutex); }

    int unlock() { return pthread_mutex_unlock(&m_mutex); }

private:

    pthread_mutex_t m_mutex;

};

class MutexLocker : Noncopyable {

public:

    MutexLocker(Mutex& mutex) : m_mutex(mutex) { m_mutex.lock(); }

    ~MutexLocker() { m_mutex.unlock(); }

private:

    Mutex& m_mutex;

};

class ThreadCondition : Noncopyable {

public:

    ThreadCondition() { pthread_cond_init(&m_condition, NULL); }

    ~ThreadCondition() { pthread_cond_destroy(&m_condition); }

    int wait(Mutex& mutex) { return pthread_cond_wait(&m_condition, &mutex.m_mutex); }

    int signal() { return pthread_cond_signal(&m_condition); }

    int broadcast() { return pthread_cond_broadcast(&m_condition); }

private:

    pthread_cond_t m_condition;

};

void callOnMainThread(void (*)());

#if PLATFORM(WIN)

void initializeThreading();

#else

inline void initializeThreading()

{

}

#endif

} // namespace WebCore

#endif // Threading_h