windows/JackWinProcessSync.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 __JackWinProcessSync__
  21 #define __JackWinProcessSync__
  22
  23 #include "JackSyncInterface.h"
  24 #include <windows.h>
  25 #include <new>
  26
  27 namespace Jack
  28 {
  29
  30 /*!
  31 \brief  A synchronization primitive built using a condition variable.
  32 */
  33
  34 class JackWinProcessSync : public JackSyncInterface
  35 {
  36
  37     private:
  38
  39         HANDLE fEvent;
  40
  41     public:
  42
  43         JackWinProcessSync()
  44         {
  45             fEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
  46             if (fEvent == NULL)
  47                 throw new std::bad_alloc;
  48         }
  49         virtual ~JackWinProcessSync()
  50         {
  51             CloseHandle(fEvent);
  52         }
  53
  54         bool Allocate(const char* name)
  55         {
  56             return true;
  57         }
  58
  59         bool Connect(const char* name)
  60         {
  61             return true;
  62         }
  63
  64         void Destroy()
  65         {}
  66
  67         bool TimedWait(long usec)
  68         {
  69             JackLog("JackWinProcessSync::Wait time out = %ld\n", usec);
  70             DWORD res = WaitForSingleObject(fEvent, usec / 1000);
  71             JackLog("JackWinProcessSync::Wait finished res = %ld\n", res == WAIT_OBJECT_0);
  72             return (res == WAIT_OBJECT_0);
  73         }
  74
  75         void Wait()
  76         {
  77             JackLog("JackWinProcessSync::Wait...\n");
  78             WaitForSingleObject(fEvent, INFINITE);
  79             JackLog("JackWinProcessSync::Wait finished\n");
  80         }
  81
  82         void SignalAll()
  83         {
  84             SetEvent(fEvent);
  85         }
  86
  87 };
  88
  89 } // end of namespace
  90
  91 #endif
  92