common/JackActivationCount.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 __JackActivationCount__
  21 #define __JackActivationCount__
  22
  23 #include "JackPlatformPlug.h"
  24 #include "JackTime.h"
  25 #include "JackTypes.h"
  26
  27 namespace Jack
  28 {
  29
  30 struct JackClientControl;
  31
  32 /*!
  33 \brief Client activation counter.
  34 */
  35
  36 class JackActivationCount
  37 {
  38
  39     private:
  40
  41         SInt32 fValue;
  42         SInt32 fCount;
  43
  44     public:
  45
  46         JackActivationCount(): fValue(0), fCount(0)
  47         {}
  48
  49         bool Signal(JackSynchro* synchro, JackClientControl* control);
  50
  51         inline void Reset()
  52         {
  53             fValue = fCount;
  54         }
  55
  56         inline void SetValue(int val)
  57         {
  58             fCount = val;
  59         }
  60
  61         inline void IncValue()
  62         {
  63             fCount++;
  64         }
  65
  66         inline void DecValue()
  67         {
  68             fCount--;
  69         }
  70
  71         inline int GetValue() const
  72         {
  73             return fValue;
  74         }
  75
  76 }  POST_PACKED_STRUCTURE;
  77
  78 } // end of namespace
  79
  80
  81 #endif