Jack2 1.9.8

JackFreewheelDriver.cpp

00001 /*
00002  Copyright (C) 2001 Paul Davis
00003  Copyright (C) 2004-2008 Grame
00004 
00005  This program is free software; you can redistribute it and/or modify
00006  it under the terms of the GNU General Public License as published by
00007  the Free Software Foundation; either version 2 of the License, or
00008  (at your option) any later version.
00009 
00010  This program is distributed in the hope that it will be useful,
00011  but WITHOUT ANY WARRANTY; without even the implied warranty of
00012  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00013  GNU General Public License for more details.
00014 
00015  You should have received a copy of the GNU General Public License
00016  along with this program; if not, write to the Free Software
00017  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
00018 
00019 */
00020 
00021 #include "JackSystemDeps.h"
00022 #include "JackFreewheelDriver.h"
00023 #include "JackEngineControl.h"
00024 #include "JackLockedEngine.h"
00025 
00026 namespace Jack
00027 {
00028 
00029 // When used in "master" mode
00030 
00031 int JackFreewheelDriver::Process()
00032 {
00033    int res = 0;
00034 
00035    jack_log("JackFreewheelDriver::Process master %lld", fEngineControl->fTimeOutUsecs);
00036    JackDriver::CycleTakeBeginTime();
00037 
00038    if (fEngine->Process(fBeginDateUst, fEndDateUst)) {
00039 
00040         if (ResumeRefNum()) {      // Signal all clients
00041             jack_error("JackFreewheelDriver::Process: ResumeRefNum error");
00042             res = -1;
00043         }
00044 
00045         // Special "SuspendRefNum" with longer timeout
00046         if (SuspendRefNum() < 0) { // Wait for all clients to finish for 10 sec
00047             jack_error("JackFreewheelDriver::ProcessSync: SuspendRefNum error");
00048             /* We have a client time-out error, but still continue to process, until a better recovery strategy is chosen */
00049             return 0;
00050         }
00051 
00052    } else { // Graph not finished: do not activate it
00053         jack_error("JackFreewheelDriver::Process: Process error");
00054         res = -1;
00055    }
00056 
00057    return res;
00058 }
00059 
00060 // When used in "slave" mode
00061 
00062 int JackFreewheelDriver::ProcessReadSync()
00063 {
00064     if (ResumeRefNum() < 0) {      // Signal all clients
00065         jack_error("JackFreewheelDriver::ProcessReadSync: ResumeRefNum error");
00066         return -1;
00067     }
00068     return 0;
00069 }
00070 
00071 int JackFreewheelDriver::ProcessWriteSync()
00072 {
00073     // Generic "SuspendRefNum" here
00074     if (JackDriver::SuspendRefNum() < 0) {
00075         jack_error("JackFreewheelDriver::ProcessSync SuspendRefNum error");
00076         return -1;
00077     }
00078     return 0;
00079 }
00080 
00081 int JackFreewheelDriver::ProcessReadAsync()
00082 {
00083     if (ResumeRefNum() < 0) {      // Signal all clients
00084         jack_error("JackFreewheelDriver::ProcessReadAsync: ResumeRefNum error");
00085         return -1;
00086     }
00087     return 0;
00088 }
00089 
00090 int JackFreewheelDriver::ProcessWriteAsync()
00091 {
00092     return 0;
00093 }
00094 
00095 int JackFreewheelDriver::SuspendRefNum()
00096 {
00097     return fGraphManager->SuspendRefNum(&fClientControl, fSynchroTable, FREEWHEEL_DRIVER_TIMEOUT * 1000000);
00098 }
00099 
00100 } // end of namespace