112 lines
3.8 KiB
C++
112 lines
3.8 KiB
C++
/*************************************************************************
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* Copyright 2000, 2010 Oracle and/or its affiliates.
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* This file is part of OpenOffice.org.
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*
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* OpenOffice.org is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 3
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* only, as published by the Free Software Foundation.
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*
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* OpenOffice.org 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
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* GNU Lesser General Public License version 3 for more details
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* (a copy is included in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU Lesser General Public License
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* version 3 along with OpenOffice.org. If not, see
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* <http://www.openoffice.org/license.html>
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* for a copy of the LGPLv3 License.
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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_dbaccess.hxx"
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#ifndef DBAUI_ASYNCRONOUSLINK_HXX
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#include "AsyncronousLink.hxx"
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#endif
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#ifndef _SV_SVAPP_HXX
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#include <vcl/svapp.hxx>
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#endif
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#ifndef _TOOLS_DEBUG_HXX
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#include <tools/debug.hxx>
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#endif
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//==================================================================
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//= OAsyncronousLink
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//==================================================================
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using namespace dbaui;
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DBG_NAME(OAsyncronousLink)
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//------------------------------------------------------------------
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OAsyncronousLink::OAsyncronousLink( const Link& _rHandler )
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:m_aHandler(_rHandler)
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,m_aEventSafety()
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,m_aDestructionSafety()
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,m_nEventId(0)
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{
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DBG_CTOR(OAsyncronousLink,NULL);
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}
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//------------------------------------------------------------------
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OAsyncronousLink::~OAsyncronousLink()
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{
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{
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::osl::MutexGuard aEventGuard( m_aEventSafety );
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if ( m_nEventId )
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Application::RemoveUserEvent(m_nEventId);
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m_nEventId = 0;
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}
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{
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::osl::MutexGuard aDestructionGuard( m_aDestructionSafety );
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// this is just for the case we're deleted while another thread just handled the event :
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// if this other thread called our link while we were deleting the event here, the
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// link handler blocked. With leaving the above block it continued, but now we are prevented
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// to leave this destructor 'til the link handler recognizes that nEvent == 0 and leaves.
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}
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DBG_DTOR(OAsyncronousLink,NULL);
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}
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//------------------------------------------------------------------
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void OAsyncronousLink::Call( void* _pArgument )
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{
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::osl::MutexGuard aEventGuard( m_aEventSafety );
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if (m_nEventId)
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Application::RemoveUserEvent(m_nEventId);
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m_nEventId = Application::PostUserEvent( LINK( this, OAsyncronousLink, OnAsyncCall ), _pArgument );
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}
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//------------------------------------------------------------------
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void OAsyncronousLink::CancelCall()
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{
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::osl::MutexGuard aEventGuard( m_aEventSafety );
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if ( m_nEventId )
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Application::RemoveUserEvent( m_nEventId );
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m_nEventId = 0;
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}
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//------------------------------------------------------------------
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IMPL_LINK(OAsyncronousLink, OnAsyncCall, void*, _pArg)
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{
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{
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::osl::MutexGuard aDestructionGuard( m_aDestructionSafety );
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{
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::osl::MutexGuard aEventGuard( m_aEventSafety );
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if (!m_nEventId)
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// our destructor deleted the event just while we we're waiting for m_aEventSafety
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// -> get outta here
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return 0;
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m_nEventId = 0;
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}
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}
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if (m_aHandler.IsSet())
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return m_aHandler.Call(_pArg);
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return 0L;
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}
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