common/JackActivationCount.cpp

   1 /*
   2 Copyright (C) 2004-2008 Grame
   3
   4 This program is free software; you can redistribute it and/or modify
   5 it under the terms of the GNU Lesser General Public License as published by
   6 the Free Software Foundation; either version 2.1 of the License, or
   7 (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 GNU Lesser General Public License for more details.
  13
  14 You should have received a copy of the GNU Lesser General Public License
  15 along with this program; if not, write to the Free Software
  16 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17
  18 */
  19
  20 #include "JackAtomic.h"
  21 #include "JackActivationCount.h"
  22 #include "JackConstants.h"
  23 #include "JackClientControl.h"
  24 #include "JackError.h"
  25
  26 namespace Jack
  27 {
  28
  29 bool JackActivationCount::Signal(JackSynchro* synchro, JackClientControl* control)
  30 {
  31     if (fValue == 0) {
  32         // Transfer activation to next clients
  33         jack_log("JackActivationCount::Signal value = 0 ref = %ld", control->fRefNum);
  34         return synchro->Signal();
  35     } else if (DEC_ATOMIC(&fValue) == 1) {
  36         return synchro->Signal();
  37     } else {
  38         return true;
  39     }
  40 }
  41
  42 } // end of namespace
  43