windows/JackWinMutex.cpp

   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 #include "JackWinMutex.h"
  21 #include "JackError.h"
  22
  23 namespace Jack
  24 {
  25
  26     bool JackBaseWinMutex::Lock()
  27     {
  28         if (fOwner != GetCurrentThreadId()) {
  29             DWORD res = WaitForSingleObject(fMutex, INFINITE);
  30             if (res == WAIT_OBJECT_0) {
  31                 fOwner = GetCurrentThreadId();
  32                 return true;
  33             } else {
  34                 jack_log("JackBaseWinMutex::Lock res = %d", res);
  35                 return false;
  36             }
  37         } else {
  38             jack_error("JackBaseWinMutex::Lock mutex already locked by thread = %d", GetCurrentThreadId());
  39             return false;
  40         }
  41     }
  42
  43     bool JackBaseWinMutex::Trylock()
  44     {
  45         if (fOwner != GetCurrentThreadId()) {
  46             DWORD res = WaitForSingleObject(fMutex, 0);
  47             if (res == WAIT_OBJECT_0) {
  48                 fOwner = GetCurrentThreadId();
  49                 return true;
  50             } else {
  51                 jack_log("JackBaseWinMutex::Trylock res = %d", res);
  52                 return false;
  53             }
  54         } else {
  55             jack_error("JackBaseWinMutex::Trylock mutex already locked by thread = %d", GetCurrentThreadId());
  56             return false;
  57         }
  58     }
  59
  60     bool JackBaseWinMutex::Unlock()
  61     {
  62         if (fOwner == GetCurrentThreadId()) {
  63             fOwner = 0;
  64             int res = ReleaseMutex(fMutex);
  65             if (res != 0) {
  66                 return true;
  67             } else {
  68                 jack_log("JackBaseWinMutex::Unlock res = %d", res);
  69                 return false;
  70             }
  71         } else {
  72             jack_error("JackBaseWinMutex::Unlock mutex not locked by thread = %d", GetCurrentThreadId());
  73             return false;
  74         }
  75     }
  76
  77     bool JackWinMutex::Lock()
  78     {
  79         if (WAIT_OBJECT_0 == WaitForSingleObject(fMutex, INFINITE)) {
  80             return true;
  81         } else  {
  82             jack_log("JackWinProcessSync::Lock WaitForSingleObject err = %d", GetLastError());
  83             return false;
  84         }
  85     }
  86
  87     bool JackWinMutex::Trylock()
  88     {
  89         if (WAIT_OBJECT_0 == WaitForSingleObject(fMutex, 0)) {
  90             return true;
  91         } else  {
  92             jack_log("JackWinProcessSync::Trylock WaitForSingleObject err = %d", GetLastError());
  93             return false;
  94         }
  95     }
  96
  97     bool JackWinMutex::Unlock()
  98     {
  99         if (!ReleaseMutex(fMutex)) {
 100             jack_log("JackWinProcessSync::Unlock ReleaseMutex err = %d", GetLastError());
 101             return false;
 102         } else  {
 103             return true;
 104         }
 105     }
 106
 107     bool JackWinCriticalSection::Lock()
 108     {
 109         EnterCriticalSection(&fSection);
 110         return true;
 111     }
 112
 113     bool JackWinCriticalSection::Trylock()
 114     {
 115         return (TryEnterCriticalSection(&fSection));
 116     }
 117
 118     bool JackWinCriticalSection::Unlock()
 119     {
 120         LeaveCriticalSection(&fSection);
 121         return true;
 122     }
 123
 124 } // namespace
 125
 126