130 lines
4.3 KiB
C++
130 lines
4.3 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: AsyncronousLink.cxx,v $
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*
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* $Revision: 1.3 $
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*
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* last change: $Author: rt $ $Date: 2005-09-08 14:25:00 $
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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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#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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//==================================================================
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//= OAsyncronousLink
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//==================================================================
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using namespace dbaui;
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//------------------------------------------------------------------
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OAsyncronousLink::OAsyncronousLink(const Link& _rHandler, ::vos::OMutex* _pEventSafety, ::vos::OMutex* _pDestructionSafety)
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:m_aHandler(_rHandler)
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,m_pEventSafety(NULL)
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,m_pDestructionSafety(NULL)
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,m_bOwnMutexes(FALSE)
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,m_nEventId(0)
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{
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if (_pEventSafety && _pDestructionSafety)
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{
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m_pEventSafety = _pEventSafety;
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m_pDestructionSafety = _pDestructionSafety;
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m_bOwnMutexes = FALSE;
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}
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else
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{
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m_pEventSafety = new ::vos::OMutex;
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m_pDestructionSafety = new ::vos::OMutex;
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m_bOwnMutexes = TRUE;
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}
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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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::vos::OGuard aEventGuard(*m_pEventSafety);
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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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::vos::OGuard aDestructionGuard(*m_pDestructionSafety);
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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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if (m_bOwnMutexes)
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{
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delete m_pEventSafety;
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delete m_pDestructionSafety;
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}
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m_pEventSafety = NULL;
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m_pDestructionSafety = 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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::vos::OGuard aEventGuard(*m_pEventSafety);
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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));
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}
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//------------------------------------------------------------------
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void OAsyncronousLink::CancelCall()
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{
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::vos::OGuard aEventGuard(*m_pEventSafety);
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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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::vos::OGuard aDestructionGuard(*m_pDestructionSafety);
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{
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::vos::OGuard aEventGuard(*m_pEventSafety);
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if (!m_nEventId)
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// our destructor deleted the event just while we we're waiting for m_pEventSafety
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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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