189 lines
4.9 KiB
C++
189 lines
4.9 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: TimerBasedTaskExecution.cxx,v $
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*
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* $Revision: 1.4 $
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*
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* last change: $Author: kz $ $Date: 2006-12-12 18:53:50 $
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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_sd.hxx"
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#include "tools/TimerBasedTaskExecution.hxx"
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#include "tools/AsynchronousTask.hxx"
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#ifndef _TIME_HXX
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#include <tools/time.hxx>
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#endif
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#include <osl/diagnose.h>
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#include <boost/weak_ptr.hpp>
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#undef VERBOSE
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namespace sd { namespace tools {
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/** Used by the shared_ptr instead of the private destructor.
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*/
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class TimerBasedTaskExecution::Deleter
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{
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public:
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void operator() (TimerBasedTaskExecution* pObject)
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{
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delete pObject;
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}
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};
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::boost::shared_ptr<TimerBasedTaskExecution> TimerBasedTaskExecution::Create (
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const ::boost::shared_ptr<AsynchronousTask>& rpTask,
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sal_uInt32 nMillisecondsBetweenSteps,
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sal_uInt32 nMaxTimePerStep)
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{
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::boost::shared_ptr<TimerBasedTaskExecution> pExecution(
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new TimerBasedTaskExecution(rpTask,nMillisecondsBetweenSteps,nMaxTimePerStep),
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Deleter());
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// Let the new object have a shared_ptr to itself, so that it can
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// release itself when the AsynchronousTask has been executed
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// completely.
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pExecution->SetSelf(pExecution);
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return pExecution;
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}
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void TimerBasedTaskExecution::Release (void)
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{
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maTimer.Stop();
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mpSelf.reset();
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}
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//static
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void TimerBasedTaskExecution::ReleaseTask (
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const ::boost::weak_ptr<TimerBasedTaskExecution>& rpExecution)
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{
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if ( ! rpExecution.expired())
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{
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try
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{
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::boost::shared_ptr<tools::TimerBasedTaskExecution> pExecution (rpExecution);
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pExecution->Release();
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}
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catch (::boost::bad_weak_ptr)
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{
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// When a bad_weak_ptr has been thrown then the object pointed
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// to by rpTask has been released right after we checked that it
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// still existed. Too bad, but that means, that we have nothing
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// more do.
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}
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}
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}
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TimerBasedTaskExecution::TimerBasedTaskExecution (
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const ::boost::shared_ptr<AsynchronousTask>& rpTask,
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sal_uInt32 nMillisecondsBetweenSteps,
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sal_uInt32 nMaxTimePerStep)
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: mpTask(rpTask),
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maTimer(),
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mpSelf(),
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mnMaxTimePerStep(nMaxTimePerStep)
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{
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Link aLink(LINK(this,TimerBasedTaskExecution,TimerCallback));
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maTimer.SetTimeoutHdl(aLink);
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maTimer.SetTimeout(nMillisecondsBetweenSteps);
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maTimer.Start();
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}
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TimerBasedTaskExecution::~TimerBasedTaskExecution (void)
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{
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maTimer.Stop();
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}
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void TimerBasedTaskExecution::SetSelf (
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const ::boost::shared_ptr<TimerBasedTaskExecution>& rpSelf)
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{
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if (mpTask.get() != NULL)
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mpSelf = rpSelf;
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}
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IMPL_LINK(TimerBasedTaskExecution,TimerCallback, Timer*,EMPTYARG)
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{
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if (mpTask.get() != NULL)
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if (mpTask->HasNextStep())
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{
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// Execute as many steps as fit into the time span of length
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// mnMaxTimePerStep. Note that the last step may take longer
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// than allowed.
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sal_uInt32 nStartTime (Time().GetMSFromTime());
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#ifdef VERBOSE
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OSL_TRACE("starting TimerBasedTaskExecution at %d", nStartTime);
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#endif
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do
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{
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mpTask->RunNextStep();
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sal_uInt32 nDuration (Time().GetMSFromTime()-nStartTime);
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#ifdef VERBOSE
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OSL_TRACE("executed step in %d", nDuration);
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#endif
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if (nDuration > mnMaxTimePerStep)
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break;
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}
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while (mpTask->HasNextStep());
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#ifdef VERBOSE
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OSL_TRACE("TimerBasedTaskExecution sleeping");
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#endif
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maTimer.Start();
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}
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else
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mpSelf.reset();
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return 0;
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}
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} } // end of namespace ::sd::tools
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