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/* -*- 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/.
*/
#ifndef INCLUDED_COMPHELPER_UNIQUE_DISPOSING_PTR_HXX
#define INCLUDED_COMPHELPER_UNIQUE_DISPOSING_PTR_HXX
#include <cppuhelper/implbase.hxx>
#include <com/sun/star/lang/XComponent.hpp>
#include <com/sun/star/frame/XDesktop.hpp>
#include <vcl/svapp.hxx>
#include <osl/mutex.hxx>
namespace comphelper
{
//Similar to std::unique_ptr, except additionally releases the ptr on XComponent::disposing and/or XTerminateListener::notifyTermination if supported
template<class T> class unique_disposing_ptr
{
private:
std::unique_ptr<T> m_xItem;
css::uno::Reference< css::frame::XTerminateListener> m_xTerminateListener;
unique_disposing_ptr(const unique_disposing_ptr&) = delete;
unique_disposing_ptr& operator=(const unique_disposing_ptr&) = delete;
public:
unique_disposing_ptr( const css::uno::Reference< css::lang::XComponent > &rComponent, T * p = nullptr )
: m_xItem(p)
{
m_xTerminateListener = new TerminateListener(rComponent, *this);
}
virtual void reset(T * p = nullptr)
{
m_xItem.reset(p);
}
T & operator*() const
{
return *m_xItem;
}
T * get() const
{
return m_xItem.get();
}
T * operator->() const
{
return m_xItem.get();
}
operator bool () const
{
return static_cast< bool >(m_xItem);
}
virtual ~unique_disposing_ptr()
{
reset();
}
private:
class TerminateListener : public ::cppu::WeakImplHelper< css::frame::XTerminateListener >
{
private:
css::uno::Reference< css::lang::XComponent > m_xComponent;
unique_disposing_ptr<T>& m_rItem;
public:
TerminateListener(const css::uno::Reference< css::lang::XComponent > &rComponent,
unique_disposing_ptr<T>& rItem) : m_xComponent(rComponent), m_rItem(rItem)
{
if (m_xComponent.is())
{
css::uno::Reference< css::frame::XDesktop> xDesktop(m_xComponent, css::uno::UNO_QUERY);
if (xDesktop.is())
xDesktop->addTerminateListener(this);
else
m_xComponent->addEventListener(this);
}
}
virtual ~TerminateListener()
{
if ( m_xComponent.is() )
{
css::uno::Reference< css::frame::XDesktop> xDesktop(m_xComponent, css::uno::UNO_QUERY);
if (xDesktop.is())
xDesktop->removeTerminateListener(this);
else
m_xComponent->removeEventListener(this);
}
}
private:
// XEventListener
virtual void SAL_CALL disposing( const css::lang::EventObject& rEvt )
throw (css::uno::RuntimeException, std::exception) override
{
bool shutDown = (rEvt.Source == m_xComponent);
if (shutDown && m_xComponent.is())
{
css::uno::Reference< css::frame::XDesktop> xDesktop(m_xComponent, css::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 css::lang::EventObject& )
throw(css::frame::TerminationVetoException,
css::uno::RuntimeException, std::exception) override
{
}
virtual void SAL_CALL notifyTermination( const css::lang::EventObject& rEvt )
throw (css::uno::RuntimeException, std::exception) override
{
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 arbitrary thread
template<class T> class unique_disposing_solar_mutex_reset_ptr
: public unique_disposing_ptr<T>
{
public:
unique_disposing_solar_mutex_reset_ptr( const css::uno::Reference< css::lang::XComponent > &rComponent, T * p = nullptr )
: unique_disposing_ptr<T>(rComponent, p)
{
}
virtual void reset(T * p = nullptr) override
{
SolarMutexGuard aGuard;
unique_disposing_ptr<T>::reset(p);
}
};
}
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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