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
  29 namespace Jack
  30 {
  31
  32 bool JackWaitThreadedDriver::Init()
  33 {
  34     return (fStarter.Start() == 0);
  35 }
  36
  37 bool JackWaitThreadedDriver::Execute()
  38 {
  39     try {
  40         // Process a null cycle until NetDriver has started
  41         while (!fStarter.fRunning && fThread.GetStatus() == JackThread::kRunning) {
  42             fDriver->ProcessNull();
  43         }
  44
  45         // Set RT
  46         if (fDriver->IsRealTime()) {
  47             jack_log("JackWaitThreadedDriver::Init IsRealTime");
  48             // Will do "something" on OSX only...
  49             GetEngineControl()->fPeriod = GetEngineControl()->fConstraint = GetEngineControl()->fPeriodUsecs * 1000;
  50             fThread.SetParams(GetEngineControl()->fPeriod, GetEngineControl()->fComputation, GetEngineControl()->fConstraint);
  51             if (fThread.AcquireSelfRealTime(GetEngineControl()->fServerPriority) < 0) {
  52                 jack_error("AcquireSelfRealTime error");
  53             } else {
  54                 set_threaded_log_function();
  55             }
  56         }
  57
  58         // Switch to keep running even in case of error
  59         while (fThread.GetStatus() == JackThread::kRunning) {
  60             fDriver->Process();
  61         }
  62         return false;
  63     } catch (JackNetException& e) {
  64         e.PrintMessage();
  65         jack_info("Driver is restarted");
  66         fThread.DropSelfRealTime();
  67         // Thread in kIniting status again...
  68         fThread.SetStatus(JackThread::kIniting);
  69         if (Init()) {
  70             // Thread in kRunning status again...
  71             fThread.SetStatus(JackThread::kRunning);
  72             return true;
  73         } else {
  74             return false;
  75         }
  76         }
  77 }
  78
  79 } // end of namespace