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Diffstat (limited to 'dbaccess/source/ui/browser/AsyncronousLink.cxx')
-rw-r--r-- | dbaccess/source/ui/browser/AsyncronousLink.cxx | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/dbaccess/source/ui/browser/AsyncronousLink.cxx b/dbaccess/source/ui/browser/AsyncronousLink.cxx new file mode 100644 index 000000000000..8007817027aa --- /dev/null +++ b/dbaccess/source/ui/browser/AsyncronousLink.cxx @@ -0,0 +1,115 @@ +/************************************************************************* + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * Copyright 2008 by Sun Microsystems, Inc. + * + * OpenOffice.org - a multi-platform office productivity suite + * + * $RCSfile: AsyncronousLink.cxx,v $ + * $Revision: 1.9 $ + * + * This file is part of OpenOffice.org. + * + * OpenOffice.org is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 3 + * only, as published by the Free Software Foundation. + * + * OpenOffice.org is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License version 3 for more details + * (a copy is included in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU Lesser General Public License + * version 3 along with OpenOffice.org. If not, see + * <http://www.openoffice.org/license.html> + * for a copy of the LGPLv3 License. + * + ************************************************************************/ + +// MARKER(update_precomp.py): autogen include statement, do not remove +#include "precompiled_dbaccess.hxx" +#ifndef DBAUI_ASYNCRONOUSLINK_HXX +#include "AsyncronousLink.hxx" +#endif +#ifndef _SV_SVAPP_HXX +#include <vcl/svapp.hxx> +#endif +#ifndef _TOOLS_DEBUG_HXX +#include <tools/debug.hxx> +#endif + +//================================================================== +//= OAsyncronousLink +//================================================================== +using namespace dbaui; +DBG_NAME(OAsyncronousLink) +//------------------------------------------------------------------ +OAsyncronousLink::OAsyncronousLink( const Link& _rHandler ) + :m_aHandler(_rHandler) + ,m_aEventSafety() + ,m_aDestructionSafety() + ,m_nEventId(0) +{ + DBG_CTOR(OAsyncronousLink,NULL); +} + +//------------------------------------------------------------------ +OAsyncronousLink::~OAsyncronousLink() +{ + { + ::osl::MutexGuard aEventGuard( m_aEventSafety ); + if ( m_nEventId ) + Application::RemoveUserEvent(m_nEventId); + m_nEventId = 0; + } + + { + ::osl::MutexGuard aDestructionGuard( m_aDestructionSafety ); + // this is just for the case we're deleted while another thread just handled the event : + // if this other thread called our link while we were deleting the event here, the + // link handler blocked. With leaving the above block it continued, but now we are prevented + // to leave this destructor 'til the link handler recognizes that nEvent == 0 and leaves. + } + DBG_DTOR(OAsyncronousLink,NULL); +} + + +//------------------------------------------------------------------ +void OAsyncronousLink::Call( void* _pArgument ) +{ + ::osl::MutexGuard aEventGuard( m_aEventSafety ); + if (m_nEventId) + Application::RemoveUserEvent(m_nEventId); + m_nEventId = Application::PostUserEvent( LINK( this, OAsyncronousLink, OnAsyncCall ), _pArgument ); +} + +//------------------------------------------------------------------ +void OAsyncronousLink::CancelCall() +{ + ::osl::MutexGuard aEventGuard( m_aEventSafety ); + if ( m_nEventId ) + Application::RemoveUserEvent( m_nEventId ); + m_nEventId = 0; +} + +//------------------------------------------------------------------ +IMPL_LINK(OAsyncronousLink, OnAsyncCall, void*, _pArg) +{ + { + ::osl::MutexGuard aDestructionGuard( m_aDestructionSafety ); + { + ::osl::MutexGuard aEventGuard( m_aEventSafety ); + if (!m_nEventId) + // our destructor deleted the event just while we we're waiting for m_aEventSafety + // -> get outta here + return 0; + m_nEventId = 0; + } + } + if (m_aHandler.IsSet()) + return m_aHandler.Call(_pArg); + + return 0L; +} |