common/JackSynchro.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 __JackSynchro__
  21 #define __JackSynchro__
  22
  23 #include "JackError.h"
  24
  25 #define SYNC_MAX_NAME_SIZE 256
  26
  27 namespace Jack
  28 {
  29
  30 /*!
  31 \brief An inter process synchronization primitive.
  32 */
  33
  34 class JackSynchro
  35 {
  36
  37     protected:
  38
  39         char fName[SYNC_MAX_NAME_SIZE];
  40         bool fFlush; // If true, signal are "flushed" : used for drivers that do no consume the signal
  41
  42         virtual void BuildName(const char* name, char* res)
  43         {}
  44
  45     public:
  46
  47         JackSynchro(): fFlush(false)
  48         {}
  49         virtual ~JackSynchro()
  50         {}
  51
  52         virtual bool Signal()
  53         {
  54             return true;
  55         }
  56         virtual bool SignalAll()
  57         {
  58             return true;
  59         }
  60         virtual bool Wait()
  61         {
  62             return true;
  63         }
  64         virtual bool TimedWait(long usec)
  65         {
  66             return true;
  67         }
  68         virtual bool Allocate(const char* name, int value)
  69         {
  70             return true;
  71         }
  72         virtual bool Connect(const char* name)
  73         {
  74             return true;
  75         }
  76         virtual bool ConnectInput(const char* name)
  77         {
  78             return true;
  79         }
  80         virtual bool ConnectOutput(const char* name)
  81         {
  82             return true;
  83         }
  84         virtual bool Disconnect()
  85         {
  86             return true;
  87         }
  88         virtual void Destroy()
  89         {}
  90
  91         void SetFlush(bool mode)
  92         {
  93             fFlush = mode;
  94         }
  95
  96 };
  97
  98
  99 } // end of namespace
 100
 101 #endif
 102