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Diffstat (limited to 'include/comphelper/scoped_disposing_ptr.hxx')
-rw-r--r-- | include/comphelper/scoped_disposing_ptr.hxx | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/include/comphelper/scoped_disposing_ptr.hxx b/include/comphelper/scoped_disposing_ptr.hxx new file mode 100644 index 000000000000..dabf9f473e92 --- /dev/null +++ b/include/comphelper/scoped_disposing_ptr.hxx @@ -0,0 +1,160 @@ +/* -*- 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 _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: */ |