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    int res = 0;
  34
  35    jack_log("JackFreewheelDriver::Process master %lld", fEngineControl->fTimeOutUsecs);
  36    JackDriver::CycleTakeBeginTime();
  37
  38    if (fEngine->Process(fBeginDateUst, fEndDateUst)) {
  39
  40         // Resume connected clients in the graph
  41         if (ResumeRefNum()) {
  42             jack_error("JackFreewheelDriver::Process: ResumeRefNum error");
  43             res = -1;
  44         }
  45
  46         // Special "SuspendRefNum" with longer timeout
  47         if (SuspendRefNum() < 0) { // Wait for all clients to finish for 10 sec
  48             jack_error("JackFreewheelDriver::ProcessSync: SuspendRefNum error");
  49             /* We have a client time-out error, but still continue to process, until a better recovery strategy is chosen */
  50             return 0;
  51         }
  52
  53    } else { // Graph not finished: do not activate it
  54         jack_error("JackFreewheelDriver::Process: Process error");
  55         res = -1;
  56    }
  57
  58    return res;
  59 }
  60
  61 // When used in "slave" mode
  62
  63 int JackFreewheelDriver::ProcessReadSync()
  64 {
  65     // Resume connected clients in the graph
  66     if (ResumeRefNum() < 0) {      // Signal all clients
  67         jack_error("JackFreewheelDriver::ProcessReadSync: ResumeRefNum error");
  68         return -1;
  69     }
  70     return 0;
  71 }
  72
  73 int JackFreewheelDriver::ProcessWriteSync()
  74 {
  75     // Generic "SuspendRefNum" here
  76     if (JackDriver::SuspendRefNum() < 0) {
  77         jack_error("JackFreewheelDriver::ProcessSync SuspendRefNum error");
  78         return -1;
  79     }
  80     return 0;
  81 }
  82
  83 int JackFreewheelDriver::ProcessReadAsync()
  84 {
  85     // Resume connected clients in the graph
  86     if (ResumeRefNum() < 0) {      // Signal all clients
  87         jack_error("JackFreewheelDriver::ProcessReadAsync: ResumeRefNum error");
  88         return -1;
  89     }
  90     return 0;
  91 }
  92
  93 int JackFreewheelDriver::ProcessWriteAsync()
  94 {
  95     return 0;
  96 }
  97
  98 int JackFreewheelDriver::SuspendRefNum()
  99 {
 100     return fGraphManager->SuspendRefNum(&fClientControl, fSynchroTable, FREEWHEEL_DRIVER_TIMEOUT * 1000000);
 101 }
 102
 103 } // end of namespace