common/JackMutex.h

   1 /*
   2  Copyright (C) 2006 Grame
   3
   4  This library is free software; you can redistribute it and/or
   5  modify it under the terms of the GNU Lesser General Public
   6  License as published by the Free Software Foundation; either
   7  version 2.1 of the License, or (at your option) any later version.
   8
   9  This library 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 GNU
  12  Lesser General Public License for more details.
  13
  14  You should have received a copy of the GNU Lesser General Public
  15  License along with this library; if not, write to the Free Software
  16  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17
  18  Grame Research Laboratory, 9 rue du Garet, 69001 Lyon - France
  19  grame@grame.fr
  20 */
  21
  22 #ifndef __JackMutex__
  23 #define __JackMutex__
  24
  25 #include <assert.h>
  26 #include "JackError.h"
  27 #include "JackPlatformPlug.h"
  28
  29
  30 namespace Jack
  31 {
  32 /*!
  33 \brief Base class for "lockable" objects.
  34 */
  35
  36 class JackLockAble
  37 {
  38
  39     private:
  40
  41         JackMutex fMutex;
  42
  43     protected:
  44
  45         JackLockAble()
  46         {}
  47         ~JackLockAble()
  48         {}
  49
  50     public:
  51
  52         void Lock()
  53         {
  54             fMutex.Lock();
  55         }
  56
  57         bool Trylock()
  58         {
  59             return fMutex.Trylock();
  60         }
  61
  62         void Unlock()
  63         {
  64             fMutex.Unlock();
  65         }
  66
  67 };
  68
  69 class JackLock
  70 {
  71     private:
  72
  73         JackLockAble* fObj;
  74
  75     public:
  76
  77         JackLock(JackLockAble* obj): fObj(obj)
  78         {
  79             fObj->Lock();
  80         }
  81
  82         JackLock(const JackLockAble* obj): fObj((JackLockAble*)obj)
  83         {
  84             fObj->Lock();
  85         }
  86
  87         ~JackLock()
  88         {
  89             fObj->Unlock();
  90         }
  91 };
  92
  93
  94 } // namespace
  95
  96 #endif