posix/JackProcessSync.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 __JackProcessSync__
  21 #define __JackProcessSync__
  22
  23 #include "JackPlatformPlug.h"
  24 #include "JackPosixMutex.h"
  25 #include "JackException.h"
  26 #include <sys/time.h>
  27 #include <unistd.h>
  28
  29 namespace Jack
  30 {
  31
  32 /*!
  33 \brief  A synchronization primitive built using a condition variable.
  34 */
  35
  36 class JackProcessSync : public JackBasePosixMutex
  37 {
  38
  39     private:
  40
  41         pthread_cond_t fCond;   // Condition variable
  42
  43     public:
  44
  45         JackProcessSync():JackBasePosixMutex()
  46         {
  47             int res = pthread_cond_init(&fCond, NULL);
  48             ThrowIf(res != 0, JackException("JackBasePosixMutex: could not init the cond variable"));
  49         }
  50
  51         virtual ~JackProcessSync()
  52         {
  53             pthread_cond_destroy(&fCond);
  54         }
  55
  56         bool TimedWait(long usec);
  57         bool LockedTimedWait(long usec);
  58
  59         void Wait();
  60         void LockedWait();
  61
  62         void Signal();
  63         void LockedSignal();
  64
  65         void SignalAll();
  66         void LockedSignalAll();
  67
  68 };
  69
  70 } // end of namespace
  71
  72 #endif
  73