common/JackWaitThreadedDriver.cpp

   1 /*
   2  Copyright (C) 2001 Paul Davis
   3  Copyright (C) 2004-2008 Grame
   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 Free Software
  17  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18
  19 */
  20
  21 #include "JackSystemDeps.h"
  22 #include "JackWaitThreadedDriver.h"
  23 #include "JackGlobals.h"
  24 #include "JackClient.h"
  25 #include "JackEngineControl.h"
  26 #include "JackException.h"
  27 #include "JackError.h"
  28 #include "JackTools.h"
  29
  30 namespace Jack
  31 {
  32
  33 bool JackWaitThreadedDriver::Init()
  34 {
  35     return (fStarter.Start() == 0);
  36 }
  37
  38 bool JackWaitThreadedDriver::Execute()
  39 {
  40     SetRealTime();
  41
  42     // Process a null cycle until NetDriver has started
  43     while (!fStarter.fRunning && fThread.GetStatus() == JackThread::kRunning) {
  44         // Use base class method
  45         assert(static_cast<JackWaiterDriver*>(fDriver));
  46         static_cast<JackWaiterDriver*>(fDriver)->ProcessNull();
  47     }
  48
  49     return ExecuteReal();
  50 }
  51
  52 bool JackWaitThreadedDriver::ExecuteReal()
  53 {
  54     try {
  55
  56         // Switch to keep running even in case of error
  57         while (fThread.GetStatus() == JackThread::kRunning) {
  58             fDriver->Process();
  59         }
  60
  61         return false;
  62
  63     } catch (JackNetException& e) {
  64
  65         e.PrintMessage();
  66         jack_info("Driver is restarted");
  67         fThread.DropSelfRealTime();
  68
  69         // Thread has been stopped...
  70         if (fThread.GetStatus() == JackThread::kIdle) {
  71             return false;
  72         }
  73
  74         // Thread in kIniting status again...
  75         fThread.SetStatus(JackThread::kIniting);
  76         if (Init()) {
  77             // Thread in kRunning status again...
  78             fThread.SetStatus(JackThread::kRunning);
  79             return true;
  80         }
  81
  82         return false;
  83     }
  84 }
  85
  86 } // end of namespace