/**************************************************************
 * 
 * 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
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/


#ifndef __MUTEXHOLDER_HXX_
#define __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;
	}

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

#endif