posix/JackPosixMutex.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 __JackPosixMutex__
  23 #define __JackPosixMutex__
  24
  25 #include "JackException.h"
  26 #include "JackCompilerDeps.h"
  27
  28 #include <pthread.h>
  29 #include <stdio.h>
  30 #include <assert.h>
  31
  32 namespace Jack
  33 {
  34 /*!
  35 \brief Mutex abstraction.
  36 */
  37
  38 class SERVER_EXPORT JackBasePosixMutex
  39 {
  40
  41     protected:
  42
  43         pthread_mutex_t fMutex;
  44         pthread_t fOwner;
  45
  46     public:
  47
  48         JackBasePosixMutex(const char* name = NULL):fOwner(0)
  49         {
  50             int res = pthread_mutex_init(&fMutex, NULL);
  51             ThrowIf(res != 0, JackException("JackBasePosixMutex: could not init the mutex"));
  52         }
  53
  54         virtual ~JackBasePosixMutex()
  55         {
  56             pthread_mutex_destroy(&fMutex);
  57         }
  58
  59         bool Lock();
  60         bool Trylock();
  61         bool Unlock();
  62
  63 };
  64
  65 class SERVER_EXPORT JackPosixMutex
  66 {
  67     protected:
  68
  69         pthread_mutex_t fMutex;
  70
  71     public:
  72
  73         JackPosixMutex(const char* name = NULL)
  74         {
  75             // Use recursive mutex
  76             pthread_mutexattr_t mutex_attr;
  77             int res;
  78             res = pthread_mutexattr_init(&mutex_attr);
  79             ThrowIf(res != 0, JackException("JackBasePosixMutex: could not init the mutex attribute"));
  80             res = pthread_mutexattr_settype(&mutex_attr, PTHREAD_MUTEX_RECURSIVE);
  81             ThrowIf(res != 0, JackException("JackBasePosixMutex: could not settype the mutex"));
  82             res = pthread_mutex_init(&fMutex, &mutex_attr);
  83             ThrowIf(res != 0, JackException("JackBasePosixMutex: could not init the mutex"));
  84             pthread_mutexattr_destroy(&mutex_attr);
  85         }
  86
  87         virtual ~JackPosixMutex()
  88         {
  89             pthread_mutex_destroy(&fMutex);
  90         }
  91
  92         bool Lock();
  93         bool Trylock();
  94         bool Unlock();
  95 };
  96
  97
  98 } // namespace
  99
 100 #endif