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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* Version: MPL 1.1 / GPLv3+ / LGPLv3+
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License or as specified alternatively below. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* Major Contributor(s):
* Copyright (C) 2011 Red Hat, Inc., Caolán McNamara <caolanm@redhat.com>
* (initial developer)
*
* All Rights Reserved.
*
* For minor contributions see the git repository.
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 3 or later (the "GPLv3+"), or
* the GNU Lesser General Public License Version 3 or later (the "LGPLv3+"),
* in which case the provisions of the GPLv3+ or the LGPLv3+ are applicable
* instead of those above.
*/
#ifndef _SCOPED_DISPOSING_PTR
#define _SCOPED_DISPOSING_PTR
#include <cppuhelper/implbase1.hxx>
#include <boost/utility.hpp>
#include <boost/scoped_ptr.hpp>
#include <com/sun/star/lang/XComponent.hpp>
#include <com/sun/star/frame/XDesktop.hpp>
// for locking SolarMutex: svapp + mutex
#include <vcl/svapp.hxx>
#include <osl/mutex.hxx>
namespace comphelper
{
//Similar to boost::scoped_ptr, except additionally releases the ptr on XComponent::disposing and/or XTerminateListener::notifyTermination if supported
template<class T> class scoped_disposing_ptr : private boost::noncopyable
{
private:
boost::scoped_ptr<T> m_aItem;
::com::sun::star::uno::Reference< ::com::sun::star::frame::XTerminateListener> m_xTerminateListener;
public:
scoped_disposing_ptr( const ::com::sun::star::uno::Reference< ::com::sun::star::lang::XComponent > &rComponent, T * p = 0 )
: m_aItem(p)
{
m_xTerminateListener = new TerminateListener(rComponent, *this);
}
virtual void reset(T * p = 0)
{
m_aItem.reset(p);
}
T & operator*() const
{
return *m_aItem;
}
T * get() const
{
return m_aItem.get();
}
T * operator->() const
{
return m_aItem.get();
}
operator bool () const
{
return static_cast< bool >(m_aItem);
}
virtual ~scoped_disposing_ptr()
{
reset();
}
private:
class TerminateListener : public ::cppu::WeakImplHelper1< ::com::sun::star::frame::XTerminateListener >
{
private:
::com::sun::star::uno::Reference< ::com::sun::star::lang::XComponent > m_xComponent;
scoped_disposing_ptr<T>& m_rItem;
public:
TerminateListener(const ::com::sun::star::uno::Reference< ::com::sun::star::lang::XComponent > &rComponent,
scoped_disposing_ptr<T>& rItem) : m_xComponent(rComponent), m_rItem(rItem)
{
if (m_xComponent.is())
{
::com::sun::star::uno::Reference< ::com::sun::star::frame::XDesktop> xDesktop(m_xComponent, ::com::sun::star::uno::UNO_QUERY);
if (xDesktop.is())
xDesktop->addTerminateListener(this);
else
m_xComponent->addEventListener(this);
}
}
~TerminateListener()
{
if ( m_xComponent.is() )
{
::com::sun::star::uno::Reference< ::com::sun::star::frame::XDesktop> xDesktop(m_xComponent, ::com::sun::star::uno::UNO_QUERY);
if (xDesktop.is())
xDesktop->removeTerminateListener(this);
else
m_xComponent->removeEventListener(this);
}
}
private:
// XEventListener
virtual void SAL_CALL disposing( const ::com::sun::star::lang::EventObject& rEvt )
throw (::com::sun::star::uno::RuntimeException)
{
bool shutDown = (rEvt.Source == m_xComponent);
if (shutDown && m_xComponent.is())
{
::com::sun::star::uno::Reference< ::com::sun::star::frame::XDesktop> xDesktop(m_xComponent, ::com::sun::star::uno::UNO_QUERY);
if (xDesktop.is())
xDesktop->removeTerminateListener(this);
else
m_xComponent->removeEventListener(this);
m_xComponent.clear();
}
if (shutDown)
m_rItem.reset();
}
// XTerminateListener
virtual void SAL_CALL queryTermination( const ::com::sun::star::lang::EventObject& )
throw(::com::sun::star::frame::TerminationVetoException,
::com::sun::star::uno::RuntimeException)
{
}
virtual void SAL_CALL notifyTermination( const ::com::sun::star::lang::EventObject& rEvt )
throw (::com::sun::star::uno::RuntimeException)
{
disposing(rEvt);
}
};
};
//Something like an OutputDevice requires the SolarMutex to be taken before use
//for threadsafety. The user can ensure this, except in the case of its dtor
//being called from reset due to a terminate on the XComponent being called
//from an aribitrary thread
template<class T> class scoped_disposing_solar_mutex_reset_ptr
: public scoped_disposing_ptr<T>
{
public:
scoped_disposing_solar_mutex_reset_ptr( const ::com::sun::star::uno::Reference< ::com::sun::star::lang::XComponent > &rComponent, T * p = 0 )
: scoped_disposing_ptr<T>(rComponent, p)
{
}
virtual void reset(T * p = 0)
{
SolarMutexGuard aGuard;
scoped_disposing_ptr<T>::reset(p);
}
};
}
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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