common/JackAtomic.h

   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 #ifndef __JackAtomic__
  21 #define __JackAtomic__
  22
  23 #include "JackTypes.h"
  24 #include "JackAtomic_os.h"
  25
  26 static inline long INC_ATOMIC(volatile SInt32* val)
  27 {
  28     SInt32 actual;
  29     do {
  30         actual = *val;
  31     } while (!CAS(actual, actual + 1, val));
  32     return actual;
  33 }
  34
  35 static inline long DEC_ATOMIC(volatile SInt32* val)
  36 {
  37     SInt32 actual;
  38     do {
  39         actual = *val;
  40     } while (!CAS(actual, actual - 1, val));
  41     return actual;
  42 }
  43
  44 #endif
  45
  46