windows/JackWinMutex.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
  21 #ifndef __JackWinMutex__
  22 #define __JackWinMutex__
  23
  24 #include <windows.h>
  25
  26 namespace Jack
  27 {
  28 /*!
  29 \brief Mutex abstraction.
  30 */
  31 class JackWinMutex
  32 {
  33
  34     protected:
  35
  36         HANDLE fMutex;
  37
  38     public:
  39
  40         JackWinMutex()
  41         {
  42             // In recursive mode by default
  43             fMutex = (HANDLE)CreateMutex(0, FALSE, 0);
  44         }
  45
  46         virtual ~JackWinMutex()
  47         {
  48             CloseHandle(fMutex);
  49         }
  50
  51         bool Lock()
  52         {
  53             return (WAIT_OBJECT_0 == WaitForSingleObject(fMutex, INFINITE));
  54         }
  55
  56         bool Trylock()
  57         {
  58             return (WAIT_OBJECT_0 == WaitForSingleObject(fMutex, 0));
  59         }
  60
  61         bool Unlock()
  62         {
  63             return(ReleaseMutex(fMutex) != 0);
  64         }
  65
  66 };
  67
  68 } // namespace
  69
  70 #endif