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