JackActivationCount.cpp

00001 /*
00002 Copyright (C) 2004-2008 Grame  
00003 
00004 This program is free software; you can redistribute it and/or modify
00005 it under the terms of the GNU General Public License as published by
00006 the Free Software Foundation; either version 2 of the License, or
00007 (at your option) any later version.
00008 
00009 This program is distributed in the hope that it will be useful,
00010 but WITHOUT ANY WARRANTY; without even the implied warranty of
00011 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012 GNU General Public License for more details.
00013 
00014 You should have received a copy of the GNU General Public License
00015 along with this program; if not, write to the Free Software
00016 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
00017 
00018 */
00019 
00020 #include "JackAtomic.h"
00021 #include "JackActivationCount.h"
00022 #include "JackConstants.h"
00023 #include "JackClientControl.h"
00024 #include "JackError.h"
00025 
00026 namespace Jack
00027 {
00028 
00029 bool JackActivationCount::Signal(JackSynchro* synchro, JackClientControl* control)
00030 {
00031     if (fValue == 0) {
00032                 // Transfer activation to next clients
00033         jack_error("JackActivationCount::Signal value = 0 ref = %ld", control->fRefNum);
00034         return synchro->Signal();
00035     } else if (DEC_ATOMIC(&fValue) == 1) {
00036                 return synchro->Signal();
00037     } else {
00038         return true;
00039     }
00040 }
00041 
00042 } // end of namespace
00043 

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