/*  PCSX2 - PS2 Emulator for PCs
 *  Copyright (C) 2002-2010  PCSX2 Dev Team
 *
 *  PCSX2 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 Found-
 *  ation, either version 3 of the License, or (at your option) any later version.
 *
 *  PCSX2 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 PCSX2.
 *  If not, see <http://www.gnu.org/licenses/>.
 */

#pragma once

#include "Threading.h"

namespace Threading
{
// --------------------------------------------------------------------------------------
//  RwMutex
// --------------------------------------------------------------------------------------
class RwMutex
{
    DeclareNoncopyableObject(RwMutex);

protected:
    pthread_rwlock_t m_rwlock;

public:
    RwMutex();
    virtual ~RwMutex();

    virtual void AcquireRead();
    virtual void AcquireWrite();
    virtual bool TryAcquireRead();
    virtual bool TryAcquireWrite();

    virtual void Release();
};

// --------------------------------------------------------------------------------------
//  BaseScopedReadWriteLock
// --------------------------------------------------------------------------------------
class BaseScopedReadWriteLock
{
    DeclareNoncopyableObject(BaseScopedReadWriteLock);

protected:
    RwMutex &m_lock;
    bool m_IsLocked;

public:
    BaseScopedReadWriteLock(RwMutex &locker)
        : m_lock(locker)
    {
    }

    virtual ~BaseScopedReadWriteLock();

    void Release();
    bool IsLocked() const { return m_IsLocked; }
};

// --------------------------------------------------------------------------------------
//  ScopedReadLock / ScopedWriteLock
// --------------------------------------------------------------------------------------
class ScopedReadLock : public BaseScopedReadWriteLock
{
public:
    ScopedReadLock(RwMutex &locker);
    virtual ~ScopedReadLock() throw() {}

    void Acquire();
};

class ScopedWriteLock : public BaseScopedReadWriteLock
{
public:
    ScopedWriteLock(RwMutex &locker);
    virtual ~ScopedWriteLock() throw() {}

    void Acquire();

protected:
    ScopedWriteLock(RwMutex &locker, bool isTryLock);
};
}