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