542 lines
16 KiB
C++
542 lines
16 KiB
C++
/*************************************************************************
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* $RCSfile: weak.cxx,v $
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*
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* $Revision: 1.12 $
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*
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* last change: $Author: obo $ $Date: 2006-09-16 12:43:37 $
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*
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* The Contents of this file are made available subject to
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* the terms of GNU Lesser General Public License Version 2.1.
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*
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*
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* GNU Lesser General Public License Version 2.1
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* =============================================
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* Copyright 2005 by Sun Microsystems, Inc.
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* 901 San Antonio Road, Palo Alto, CA 94303, USA
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2.1, as published by the Free Software Foundation.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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************************************************************************/
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// MARKER(update_precomp.py): autogen include statement, do not remove
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#include "precompiled_cppuhelper.hxx"
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#ifndef _OSL_MUTEX_HXX_
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#include <osl/mutex.hxx>
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#endif
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#ifndef _CPPU_WEAKAGG_HXX_
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#include <cppuhelper/weakagg.hxx>
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#endif
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#ifndef _CPPU_HELPER_INTERFACECONTAINER_HXX_
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#include <cppuhelper/interfacecontainer.hxx>
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#endif
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using namespace osl;
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using namespace com::sun::star::uno;
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/** */ //for docpp
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namespace cppu
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{
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// due to static Reflection destruction from usr, ther must be a mutex leak (#73272#)
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inline static Mutex & getWeakMutex() SAL_THROW( () )
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{
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static Mutex * s_pMutex = 0;
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if (! s_pMutex)
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s_pMutex = new Mutex();
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return *s_pMutex;
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}
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//------------------------------------------------------------------------
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//-- OWeakConnectionPoint ----------------------------------------------------
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//------------------------------------------------------------------------
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class OWeakConnectionPoint : public XAdapter
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{
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public:
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/**
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Hold the weak object without an acquire (only the pointer).
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*/
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OWeakConnectionPoint( OWeakObject* pObj ) SAL_THROW( () )
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: m_aRefCount( 0 )
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, m_pObject(pObj)
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, m_aReferences( getWeakMutex() )
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{}
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// XInterface
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Any SAL_CALL queryInterface( const Type & rType ) throw(::com::sun::star::uno::RuntimeException);
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void SAL_CALL acquire() throw();
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void SAL_CALL release() throw();
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// XAdapter
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::com::sun::star::uno::Reference< ::com::sun::star::uno::XInterface > SAL_CALL queryAdapted() throw(::com::sun::star::uno::RuntimeException);
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void SAL_CALL addReference( const ::com::sun::star::uno::Reference< ::com::sun::star::uno::XReference >& xRef ) throw(::com::sun::star::uno::RuntimeException);
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void SAL_CALL removeReference( const ::com::sun::star::uno::Reference< ::com::sun::star::uno::XReference >& xRef ) throw(::com::sun::star::uno::RuntimeException);
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/// Called from the weak object if the reference count goes to zero.
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void SAL_CALL dispose() throw(::com::sun::star::uno::RuntimeException);
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private:
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OWeakConnectionPoint(OWeakConnectionPoint &); // not defined
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void operator =(OWeakConnectionPoint &); // not defined
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virtual ~OWeakConnectionPoint() {}
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/// The reference counter.
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oslInterlockedCount m_aRefCount;
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/// The weak object
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OWeakObject* m_pObject;
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/// The container to hold the weak references
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OInterfaceContainerHelper m_aReferences;
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};
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// XInterface
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Any SAL_CALL OWeakConnectionPoint::queryInterface( const Type & rType )
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throw(com::sun::star::uno::RuntimeException)
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{
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return ::cppu::queryInterface(
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rType, static_cast< XAdapter * >( this ), static_cast< XInterface * >( this ) );
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}
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// XInterface
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void SAL_CALL OWeakConnectionPoint::acquire() throw()
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{
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osl_incrementInterlockedCount( &m_aRefCount );
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}
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// XInterface
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void SAL_CALL OWeakConnectionPoint::release() throw()
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{
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if (! osl_decrementInterlockedCount( &m_aRefCount ))
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delete this;
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}
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void SAL_CALL OWeakConnectionPoint::dispose() throw(::com::sun::star::uno::RuntimeException)
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{
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OInterfaceIteratorHelper aIt( m_aReferences );
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while( aIt.hasMoreElements() )
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((XReference *)aIt.next())->dispose();
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}
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// XInterface
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Reference< XInterface > SAL_CALL OWeakConnectionPoint::queryAdapted() throw(::com::sun::star::uno::RuntimeException)
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{
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Reference< XInterface > ret;
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ClearableMutexGuard guard(getWeakMutex());
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if (m_pObject)
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{
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oslInterlockedCount n = osl_incrementInterlockedCount( &m_pObject->m_refCount );
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if (n > 1)
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{
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// The refence is incremented. The object cannot be destroyed.
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// Release the guard at the earliest point.
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guard.clear();
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// WeakObject has a (XInterface *) cast operator
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ret = *m_pObject;
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n = osl_decrementInterlockedCount( &m_pObject->m_refCount );
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}
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else
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// Another thread wait in the dispose method at the guard
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n = osl_decrementInterlockedCount( &m_pObject->m_refCount );
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}
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return ret;
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}
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// XInterface
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void SAL_CALL OWeakConnectionPoint::addReference(const Reference< XReference >& rRef)
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throw(::com::sun::star::uno::RuntimeException)
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{
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m_aReferences.addInterface( (const Reference< XInterface > &)rRef );
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}
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// XInterface
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void SAL_CALL OWeakConnectionPoint::removeReference(const Reference< XReference >& rRef)
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throw(::com::sun::star::uno::RuntimeException)
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{
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m_aReferences.removeInterface( (const Reference< XInterface > &)rRef );
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}
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//------------------------------------------------------------------------
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//-- OWeakObject -------------------------------------------------------
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//------------------------------------------------------------------------
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#ifdef _MSC_VER
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// Accidentally occurs in msvc mapfile = > had to be outlined.
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OWeakObject::OWeakObject() SAL_THROW( () )
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: m_refCount( 0 ),
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m_pWeakConnectionPoint( 0 )
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{
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}
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#endif
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// XInterface
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Any SAL_CALL OWeakObject::queryInterface( const Type & rType ) throw(::com::sun::star::uno::RuntimeException)
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{
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return ::cppu::queryInterface(
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rType,
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static_cast< XWeak * >( this ), static_cast< XInterface * >( this ) );
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}
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// XInterface
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void SAL_CALL OWeakObject::acquire() throw()
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{
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osl_incrementInterlockedCount( &m_refCount );
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}
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// XInterface
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void SAL_CALL OWeakObject::release() throw()
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{
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if (osl_decrementInterlockedCount( &m_refCount ) == 0) {
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// notify/clear all weak-refs before object's dtor is executed
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// (which may check weak-refs to this object):
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if (m_pWeakConnectionPoint != 0) {
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OWeakConnectionPoint * const p = m_pWeakConnectionPoint;
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m_pWeakConnectionPoint = 0;
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try {
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p->dispose();
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}
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catch (RuntimeException const& exc) {
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OSL_ENSURE(
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false, OUStringToOString(
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exc.Message, RTL_TEXTENCODING_ASCII_US ).getStr() );
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static_cast<void>(exc);
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}
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p->release();
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}
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// destroy object:
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delete this;
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}
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}
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OWeakObject::~OWeakObject() SAL_THROW( (RuntimeException) )
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{
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}
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// XWeak
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Reference< XAdapter > SAL_CALL OWeakObject::queryAdapter()
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throw (::com::sun::star::uno::RuntimeException)
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{
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if (!m_pWeakConnectionPoint)
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{
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// only acquire mutex if member is not created
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MutexGuard aGuard( getWeakMutex() );
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if( !m_pWeakConnectionPoint )
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{
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OWeakConnectionPoint * p = new OWeakConnectionPoint(this);
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p->acquire();
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m_pWeakConnectionPoint = p;
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}
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}
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return m_pWeakConnectionPoint;
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}
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//------------------------------------------------------------------------
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//-- OWeakAggObject ----------------------------------------------------
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//------------------------------------------------------------------------
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OWeakAggObject::~OWeakAggObject() SAL_THROW( (RuntimeException) )
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{
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}
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// XInterface
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void OWeakAggObject::acquire() throw()
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{
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Reference<XInterface > x( xDelegator );
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if (x.is())
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x->acquire();
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else
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OWeakObject::acquire();
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}
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// XInterface
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void OWeakAggObject::release() throw()
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{
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Reference<XInterface > x( xDelegator );
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if (x.is())
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x->release();
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else
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OWeakObject::release();
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}
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// XInterface
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Any OWeakAggObject::queryInterface( const Type & rType ) throw(::com::sun::star::uno::RuntimeException)
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{
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Reference< XInterface > x( xDelegator ); // harden ref
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return (x.is() ? x->queryInterface( rType ) : queryAggregation( rType ));
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// // set rOut to zero, if failed
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// if( !xDelegator.queryHardRef( aUik, rOut ) )
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// {
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// XInterfaceRef x;
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// if( !xDelegator.queryHardRef( ((XInterface*)0)->getSmartUik(), x ) )
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// // reference is not valid
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// queryAggregation( aUik, rOut );
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// }
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// return rOut.is();
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}
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// XAggregation
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Any OWeakAggObject::queryAggregation( const Type & rType ) throw(::com::sun::star::uno::RuntimeException)
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{
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return ::cppu::queryInterface(
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rType,
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static_cast< XInterface * >( static_cast< OWeakObject * >( this ) ),
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static_cast< XAggregation * >( this ),
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static_cast< XWeak * >( this ) );
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}
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// XAggregation
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void OWeakAggObject::setDelegator( const Reference<XInterface > & rDelegator ) throw(::com::sun::star::uno::RuntimeException)
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{
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xDelegator = rDelegator;
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}
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}
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/** */ //for docpp
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namespace com
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{
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/** */ //for docpp
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namespace sun
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{
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/** */ //for docpp
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namespace star
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{
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/** */ //for docpp
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namespace uno
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{
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//------------------------------------------------------------------------
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//-- OWeakRefListener -----------------------------------------------------
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//------------------------------------------------------------------------
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class OWeakRefListener : public XReference
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{
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public:
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OWeakRefListener() SAL_THROW( () );
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OWeakRefListener(const OWeakRefListener& rRef) SAL_THROW( () );
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OWeakRefListener(const Reference< XInterface >& xInt) SAL_THROW( () );
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virtual ~OWeakRefListener() SAL_THROW( () );
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// XInterface
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Any SAL_CALL queryInterface( const Type & rType ) throw(RuntimeException);
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void SAL_CALL acquire() throw();
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void SAL_CALL release() throw();
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// XReference
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void SAL_CALL dispose() throw(::com::sun::star::uno::RuntimeException);
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/// The reference counter.
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oslInterlockedCount m_aRefCount;
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/// The connection point of the weak object
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Reference< XAdapter > m_XWeakConnectionPoint;
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private:
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OWeakRefListener& SAL_CALL operator=(const OWeakRefListener& rRef) SAL_THROW( () );
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};
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OWeakRefListener::OWeakRefListener() SAL_THROW( () )
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: m_aRefCount( 0 )
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{
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}
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OWeakRefListener::OWeakRefListener(const OWeakRefListener& rRef) SAL_THROW( () )
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: com::sun::star::uno::XReference()
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, m_aRefCount( 1 )
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{
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try
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{
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m_XWeakConnectionPoint = rRef.m_XWeakConnectionPoint;
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if (m_XWeakConnectionPoint.is())
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{
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m_XWeakConnectionPoint->addReference((XReference*)this);
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}
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}
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catch (RuntimeException &) { OSL_ASSERT( 0 ); } // assert here, but no unexpected()
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osl_decrementInterlockedCount( &m_aRefCount );
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}
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OWeakRefListener::OWeakRefListener(const Reference< XInterface >& xInt) SAL_THROW( () )
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: m_aRefCount( 1 )
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{
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try
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{
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Reference< XWeak > xWeak( Reference< XWeak >::query( xInt ) );
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if (xWeak.is())
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{
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m_XWeakConnectionPoint = xWeak->queryAdapter();
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if (m_XWeakConnectionPoint.is())
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{
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m_XWeakConnectionPoint->addReference((XReference*)this);
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}
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}
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}
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catch (RuntimeException &) { OSL_ASSERT( 0 ); } // assert here, but no unexpected()
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osl_decrementInterlockedCount( &m_aRefCount );
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}
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OWeakRefListener::~OWeakRefListener() SAL_THROW( () )
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{
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try
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{
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if (m_XWeakConnectionPoint.is())
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{
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acquire(); // dont die again
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m_XWeakConnectionPoint->removeReference((XReference*)this);
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}
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}
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catch (RuntimeException &) { OSL_ASSERT( 0 ); } // assert here, but no unexpected()
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}
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// XInterface
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Any SAL_CALL OWeakRefListener::queryInterface( const Type & rType ) throw(RuntimeException)
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{
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return ::cppu::queryInterface(
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rType, static_cast< XReference * >( this ), static_cast< XInterface * >( this ) );
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}
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// XInterface
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void SAL_CALL OWeakRefListener::acquire() throw()
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{
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osl_incrementInterlockedCount( &m_aRefCount );
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}
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// XInterface
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void SAL_CALL OWeakRefListener::release() throw()
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{
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if( ! osl_decrementInterlockedCount( &m_aRefCount ) )
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delete this;
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}
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void SAL_CALL OWeakRefListener::dispose()
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throw(::com::sun::star::uno::RuntimeException)
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{
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Reference< XAdapter > xAdp;
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{
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MutexGuard guard(cppu::getWeakMutex());
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if( m_XWeakConnectionPoint.is() )
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{
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xAdp = m_XWeakConnectionPoint;
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m_XWeakConnectionPoint.clear();
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}
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}
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if( xAdp.is() )
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xAdp->removeReference((XReference*)this);
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}
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//------------------------------------------------------------------------
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//-- WeakReferenceHelper ----------------------------------------------------------
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//------------------------------------------------------------------------
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WeakReferenceHelper::WeakReferenceHelper(const Reference< XInterface >& xInt) SAL_THROW( () )
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: m_pImpl( 0 )
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{
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if (xInt.is())
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{
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m_pImpl = new OWeakRefListener(xInt);
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m_pImpl->acquire();
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}
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}
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WeakReferenceHelper::WeakReferenceHelper(const WeakReferenceHelper& rWeakRef) SAL_THROW( () )
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: m_pImpl( 0 )
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{
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Reference< XInterface > xInt( rWeakRef.get() );
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if (xInt.is())
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{
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m_pImpl = new OWeakRefListener(xInt);
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m_pImpl->acquire();
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}
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}
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WeakReferenceHelper& WeakReferenceHelper::operator=(const WeakReferenceHelper& rWeakRef) SAL_THROW( () )
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{
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try
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{
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if (this != &rWeakRef)
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{
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Reference< XInterface > xInt( rWeakRef.get() );
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if (m_pImpl)
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{
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if (m_pImpl->m_XWeakConnectionPoint.is())
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{
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m_pImpl->m_XWeakConnectionPoint->removeReference((XReference*)m_pImpl);
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m_pImpl->m_XWeakConnectionPoint.clear();
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}
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m_pImpl->release();
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m_pImpl = 0;
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}
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if (xInt.is())
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{
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m_pImpl = new OWeakRefListener(xInt);
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m_pImpl->acquire();
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}
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}
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}
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catch (RuntimeException &) { OSL_ASSERT( 0 ); } // assert here, but no unexpected()
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return *this;
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}
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WeakReferenceHelper::~WeakReferenceHelper() SAL_THROW( () )
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{
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try
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{
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if (m_pImpl)
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{
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if (m_pImpl->m_XWeakConnectionPoint.is())
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{
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m_pImpl->m_XWeakConnectionPoint->removeReference((XReference*)m_pImpl);
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m_pImpl->m_XWeakConnectionPoint.clear();
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}
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m_pImpl->release();
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m_pImpl = 0; // for safety
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}
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}
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catch (RuntimeException &) { OSL_ASSERT( 0 ); } // assert here, but no unexpected()
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}
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Reference< XInterface > WeakReferenceHelper::get() const SAL_THROW( () )
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{
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try
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{
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Reference< XAdapter > xAdp;
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{
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MutexGuard guard(cppu::getWeakMutex());
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if( m_pImpl && m_pImpl->m_XWeakConnectionPoint.is() )
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xAdp = m_pImpl->m_XWeakConnectionPoint;
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}
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if (xAdp.is())
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return xAdp->queryAdapted();
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}
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catch (RuntimeException &) { OSL_ASSERT( 0 ); } // assert here, but no unexpected()
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return Reference< XInterface >();
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}
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}
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}
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}
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}
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