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 <pthread.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 JackProcessSync
  36 {
  37
  38     private:
  39
  40         pthread_mutex_t fLock;  // Mutex
  41         pthread_cond_t fCond;   // Condition variable
  42
  43     public:
  44
  45         JackProcessSync()
  46         {
  47             pthread_mutex_init(&fLock, NULL);
  48             pthread_cond_init(&fCond, NULL);
  49         }
  50
  51         ~JackProcessSync()
  52         {
  53             pthread_mutex_destroy(&fLock);
  54             pthread_cond_destroy(&fCond);
  55         }
  56
  57         bool Allocate(const char* name)
  58         {
  59             return true;
  60         }
  61
  62         bool Connect(const char* name)
  63         {
  64             return true;
  65         }
  66
  67         void Destroy()
  68         {}
  69
  70         bool TimedWait(long usec);
  71
  72         void Wait();
  73
  74         void Signal()
  75         {
  76             pthread_mutex_lock(&fLock);
  77             pthread_cond_signal(&fCond);
  78             pthread_mutex_unlock(&fLock);
  79         }
  80
  81         void SignalAll()
  82         {
  83             //pthread_mutex_lock(&fLock);
  84             pthread_cond_broadcast(&fCond);
  85             //pthread_mutex_unlock(&fLock);
  86         }
  87
  88 };
  89
  90 /*!
  91 \brief  A synchronization primitive built using an inter-process synchronization object.
  92 */
  93
  94 class JackInterProcessSync
  95 {
  96
  97     private:
  98
  99         JackSynchro* fSynchro;
 100
 101     public:
 102
 103         JackInterProcessSync(JackSynchro* synchro): fSynchro(synchro)
 104         {}
 105         ~JackInterProcessSync()
 106         {
 107             delete fSynchro;
 108         }
 109
 110         bool Allocate(const char* name)
 111         {
 112             return fSynchro->Allocate(name, "", 0);
 113         }
 114
 115         void Destroy()
 116         {
 117             fSynchro->Destroy();
 118         }
 119
 120         bool Connect(const char* name)
 121         {
 122             return fSynchro->Connect(name, "");
 123         }
 124
 125         bool TimedWait(long usec);
 126
 127         void Wait()
 128         {
 129             fSynchro->Wait();
 130         }
 131
 132         void SignalAll()
 133         {
 134             fSynchro->SignalAll();
 135         }
 136 };
 137
 138
 139 } // end of namespace
 140
 141 #endif
 142