Jack2 1.9.6

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 Lesser General Public License as published by
00006 the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
00013 
00014 You should have received a copy of the GNU Lesser General Public License
00015 along with this program; if not, write to the Free Software 
00016 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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