Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /*
       3             :  * This file is part of the LibreOffice project.
       4             :  *
       5             :  * This Source Code Form is subject to the terms of the Mozilla Public
       6             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8             :  *
       9             :  * This file incorporates work covered by the following license notice:
      10             :  *
      11             :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12             :  *   contributor license agreements. See the NOTICE file distributed
      13             :  *   with this work for additional information regarding copyright
      14             :  *   ownership. The ASF licenses this file to you under the Apache
      15             :  *   License, Version 2.0 (the "License"); you may not use this file
      16             :  *   except in compliance with the License. You may obtain a copy of
      17             :  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
      18             :  */
      19             : 
      20             : #include "tools/TimerBasedTaskExecution.hxx"
      21             : #include "tools/AsynchronousTask.hxx"
      22             : #include <tools/time.hxx>
      23             : #include <osl/diagnose.h>
      24             : #include <boost/weak_ptr.hpp>
      25             : #include "sal/log.hxx"
      26             : 
      27             : namespace sd { namespace tools {
      28             : 
      29             : /** Used by the shared_ptr instead of the private destructor.
      30             : */
      31             : class TimerBasedTaskExecution::Deleter
      32             : {
      33             : public:
      34           0 :     void operator() (TimerBasedTaskExecution* pObject)
      35             :     {
      36           0 :         delete pObject;
      37           0 :     }
      38             : };
      39             : 
      40           0 : ::boost::shared_ptr<TimerBasedTaskExecution> TimerBasedTaskExecution::Create (
      41             :     const ::boost::shared_ptr<AsynchronousTask>& rpTask,
      42             :     sal_uInt32 nMillisecondsBetweenSteps,
      43             :     sal_uInt32 nMaxTimePerStep)
      44             : {
      45             :     ::boost::shared_ptr<TimerBasedTaskExecution> pExecution(
      46           0 :         new TimerBasedTaskExecution(rpTask,nMillisecondsBetweenSteps,nMaxTimePerStep),
      47           0 :         Deleter());
      48             :     // Let the new object have a shared_ptr to itself, so that it can
      49             :     // release itself when the AsynchronousTask has been executed
      50             :     // completely.
      51           0 :     pExecution->SetSelf(pExecution);
      52           0 :     return pExecution;
      53             : }
      54             : 
      55           0 : void TimerBasedTaskExecution::Release (void)
      56             : {
      57           0 :     maTimer.Stop();
      58           0 :     mpSelf.reset();
      59           0 : }
      60             : 
      61             : //static
      62           0 : void TimerBasedTaskExecution::ReleaseTask (
      63             :     const ::boost::weak_ptr<TimerBasedTaskExecution>& rpExecution)
      64             : {
      65           0 :     if ( ! rpExecution.expired())
      66             :     {
      67             :         try
      68             :         {
      69           0 :             ::boost::shared_ptr<tools::TimerBasedTaskExecution> pExecution (rpExecution);
      70           0 :             pExecution->Release();
      71             :         }
      72           0 :         catch (const ::boost::bad_weak_ptr&)
      73             :         {
      74             :             // When a bad_weak_ptr has been thrown then the object pointed
      75             :             // to by rpTask has been released right after we checked that it
      76             :             // still existed.  Too bad, but that means, that we have nothing
      77             :             // more do.
      78             :         }
      79             :     }
      80           0 : }
      81             : 
      82           0 : TimerBasedTaskExecution::TimerBasedTaskExecution (
      83             :     const ::boost::shared_ptr<AsynchronousTask>& rpTask,
      84             :     sal_uInt32 nMillisecondsBetweenSteps,
      85             :     sal_uInt32 nMaxTimePerStep)
      86             :     : mpTask(rpTask),
      87             :       maTimer(),
      88             :       mpSelf(),
      89           0 :       mnMaxTimePerStep(nMaxTimePerStep)
      90             : {
      91           0 :     Link aLink(LINK(this,TimerBasedTaskExecution,TimerCallback));
      92           0 :     maTimer.SetTimeoutHdl(aLink);
      93           0 :     maTimer.SetTimeout(nMillisecondsBetweenSteps);
      94           0 :     maTimer.Start();
      95           0 : }
      96             : 
      97           0 : TimerBasedTaskExecution::~TimerBasedTaskExecution (void)
      98             : {
      99           0 :     maTimer.Stop();
     100           0 : }
     101             : 
     102           0 : void TimerBasedTaskExecution::SetSelf (
     103             :     const ::boost::shared_ptr<TimerBasedTaskExecution>& rpSelf)
     104             : {
     105           0 :     if (mpTask.get() != NULL)
     106           0 :         mpSelf = rpSelf;
     107           0 : }
     108             : 
     109           0 : IMPL_LINK_NOARG(TimerBasedTaskExecution, TimerCallback)
     110             : {
     111           0 :     if (mpTask.get() != NULL)
     112             :     {
     113           0 :         if (mpTask->HasNextStep())
     114             :         {
     115             :             // Execute as many steps as fit into the time span of length
     116             :             // mnMaxTimePerStep.  Note that the last step may take longer
     117             :             // than allowed.
     118           0 :             sal_uInt32 nStartTime (::tools::Time( ::tools::Time::SYSTEM ).GetMSFromTime());
     119             :             SAL_INFO("sd.tools", OSL_THIS_FUNC << ": starting TimerBasedTaskExecution at " << nStartTime);
     120           0 :             do
     121             :             {
     122           0 :                 mpTask->RunNextStep();
     123           0 :                 sal_uInt32 nDuration (::tools::Time( ::tools::Time::SYSTEM ).GetMSFromTime()-nStartTime);
     124             :                 SAL_INFO("sd.tools", OSL_THIS_FUNC << ": executed step in " << nDuration);
     125           0 :                 if (nDuration > mnMaxTimePerStep)
     126           0 :                     break;
     127             :             }
     128           0 :             while (mpTask->HasNextStep());
     129             :             SAL_INFO("sd.tools", OSL_THIS_FUNC << ": TimerBasedTaskExecution sleeping");
     130           0 :             maTimer.Start();
     131             :         }
     132             :         else
     133           0 :             mpSelf.reset();
     134             :     }
     135             : 
     136           0 :     return 0;
     137             : }
     138             : 
     139             : } } // end of namespace ::sd::tools
     140             : 
     141             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */