common/JackFifo.h

   1 /*
   2 Copyright (C) 2004-2006 Grame
   3
   4 This program is free software; you can redistribute it and/or modify
   5   it under the terms of the GNU General Public License as published by
   6   the Free Software Foundation; either version 2 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 General Public License for more details.
  13
  14   You should have received a copy of the GNU General Public License
  15   along with this program; if not, write to the Free Software
  16   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #ifndef __JackFifo__
  21 #define __JackFifo__
  22
  23 #include "JackSynchro.h"
  24 #include <assert.h>
  25 #include <stdio.h>
  26 #include <poll.h>
  27
  28 namespace Jack
  29 {
  30
  31 /*!
  32 \brief Inter process synchronization using Fifo.
  33 */
  34
  35 class JackFifo : public JackSynchro
  36 {
  37
  38     private:
  39
  40         int fFifo;
  41         pollfd fPoll;
  42
  43         bool ConnectAux(const char* name, int access);
  44
  45     protected:
  46
  47         void BuildName(const char* name, char* res);
  48
  49     public:
  50
  51         JackFifo(): JackSynchro(), fFifo( -1)
  52         {}
  53         virtual ~JackFifo()
  54         {}
  55
  56         bool Signal();
  57         bool SignalAll();
  58         bool Wait();
  59         bool TimedWait(long usec);
  60
  61         bool Allocate(const char* name, int value);
  62         bool Connect(const char* name);
  63         bool ConnectInput(const char* name);
  64         bool ConnectOutput(const char* name);
  65         bool Disconnect();
  66         void Destroy();
  67 };
  68
  69 } // end of namespace
  70
  71
  72 #endif
  73