common/JackFreewheelDriver.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 "JackFreewheelDriver.h"
  23 #include "JackEngineControl.h"
  24 #include "JackLockedEngine.h"
  25
  26 namespace Jack
  27 {
  28
  29 // When used in "master" mode
  30
  31 int JackFreewheelDriver::Process()
  32 {
  33    jack_log("JackFreewheelDriver::Process master %lld", fEngineControl->fTimeOutUsecs);
  34    JackDriver::CycleTakeBeginTime();
  35
  36    if (fEngine->Process(fBeginDateUst, fEndDateUst)) {
  37
  38         // Resume connected clients in the graph
  39         if (ResumeRefNum() < 0) {
  40             jack_error("JackFreewheelDriver::Process: ResumeRefNum error");
  41         }
  42
  43         // Special "SuspendRefNum" with longer timeout
  44         if (SuspendRefNum() < 0) { // Wait for all clients to finish for FREEWHEEL_DRIVER_TIMEOUT sec
  45             jack_error("JackFreewheelDriver::Process: SuspendRefNum error");
  46         }
  47
  48    } else { // Graph not finished: do not activate it
  49         jack_error("JackFreewheelDriver::Process: Process error");
  50    }
  51
  52    return 0;
  53 }
  54
  55 // When used in "slave" mode
  56
  57 int JackFreewheelDriver::ProcessReadSync()
  58 {
  59     // Resume connected clients in the graph
  60     if (ResumeRefNum() < 0) {      // Signal all clients
  61         jack_error("JackFreewheelDriver::ProcessReadSync: ResumeRefNum error");
  62         return -1;
  63     }
  64     return 0;
  65 }
  66
  67 int JackFreewheelDriver::ProcessWriteSync()
  68 {
  69     // Generic "SuspendRefNum" here
  70     if (JackDriver::SuspendRefNum() < 0) {
  71         jack_error("JackFreewheelDriver::ProcessSync: SuspendRefNum error");
  72         return -1;
  73     }
  74     return 0;
  75 }
  76
  77 int JackFreewheelDriver::ProcessReadAsync()
  78 {
  79     // Resume connected clients in the graph
  80     if (ResumeRefNum() < 0) {      // Signal all clients
  81         jack_error("JackFreewheelDriver::ProcessReadAsync: ResumeRefNum error");
  82         return -1;
  83     }
  84     return 0;
  85 }
  86
  87 int JackFreewheelDriver::ProcessWriteAsync()
  88 {
  89     return 0;
  90 }
  91
  92 int JackFreewheelDriver::SuspendRefNum()
  93 {
  94     return fGraphManager->SuspendRefNum(&fClientControl, fSynchroTable, FREEWHEEL_DRIVER_TIMEOUT * 1000000);
  95 }
  96
  97 } // end of namespace