/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#ifndef INCLUDED_PACKAGE_INC_MUTEXHOLDER_HXX
#define INCLUDED_PACKAGE_INC_MUTEXHOLDER_HXX

#include <osl/mutex.hxx>

class SotMutexHolder
{
    ::osl::Mutex m_aMutex;
    sal_Int32    m_nRefCount;

    public:
    SotMutexHolder() : m_nRefCount( 0 ) {}

    void AddRef()
    {
        m_nRefCount++;
    }

    void ReleaseRef()
    {
        if ( !--m_nRefCount )
            delete this;
    }

    ::osl::Mutex& GetMutex() { return m_aMutex; }
};

class SotMutexHolderRef
{
    SotMutexHolder* m_pHolder;

public:
    SotMutexHolderRef()
    : m_pHolder( NULL )
    {}

    SotMutexHolderRef( SotMutexHolder* pHolder )
    : m_pHolder( pHolder )
    {
        if ( m_pHolder )
            m_pHolder->AddRef();
    }

    SotMutexHolderRef( const SotMutexHolderRef& rRef )
    : m_pHolder( rRef.m_pHolder )
    {
        if ( m_pHolder )
            m_pHolder->AddRef();
    }

    ~SotMutexHolderRef()
    {
        if ( m_pHolder )
            m_pHolder->ReleaseRef();
    }

    SotMutexHolderRef& operator =( const SotMutexHolderRef& rRef )
    {
        if ( m_pHolder )
            m_pHolder->ReleaseRef();

        m_pHolder = rRef.m_pHolder;

        if ( m_pHolder )
            m_pHolder->AddRef();

        return *this;
    }

    SotMutexHolderRef& operator =( SotMutexHolder* pHolder )
    {
        if ( m_pHolder )
            m_pHolder->ReleaseRef();

        m_pHolder = pHolder;

        if ( m_pHolder )
            m_pHolder->AddRef();
        return *this;
    }

    SotMutexHolder* operator ->() const
    {
        return m_pHolder;
    }

    SotMutexHolder& operator *() const
    {
        return *m_pHolder;
    }

    operator SotMutexHolder*() const
    {
        return m_pHolder;
    }

    bool Is() const
    {
        return m_pHolder != NULL;
    }
};

#endif

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