src/AsyncFramework/SchedulerSuspension.h

   1 /***************************************************************************
   2  *   Copyright (C) 2011 by Stefan Fuhrmann                                 *
   3  *   stefanfuhrmann@alice-dsl.de                                           *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20
  21 #pragma once
  22
  23 #include "JobScheduler.h"
  24
  25 namespace async
  26 {
  27
  28 /**
  29  * RAII class that will Stop() / Resume() a given job scheduler.
  30  */
  31
  32 class CSchedulerSuspension
  33 {
  34 private:
  35
  36     CJobScheduler* scheduler;
  37
  38 public:
  39
  40     // construction: as a side effect, stop scheduler
  41
  42     CSchedulerSuspension (CJobScheduler* scheduler)
  43         : scheduler (scheduler)
  44     {
  45         scheduler->Stop();
  46     }
  47
  48     CSchedulerSuspension (CJobScheduler& scheduler)
  49         : scheduler (&scheduler)
  50     {
  51         scheduler.Stop();
  52     }
  53
  54     // destruction: as a side effect, resume the scheduler
  55
  56     ~CSchedulerSuspension()
  57     {
  58         scheduler->Resume();
  59     }
  60 };
  61
  62 }