office-gobmx/package/inc/mutexholder.hxx

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 * Copyright 2008 by Sun Microsystems, Inc.
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 * $RCSfile: mutexholder.hxx,v $
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#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