NonRecursiveMutexLock.hpp

Go to the documentation of this file.
00001 /*******************************************************************************
00002 * Copyright (C) 2004 Vintela, Inc. All rights reserved.
00003 * Copyright (C) 2005 Novell, Inc. All rights reserved.
00004 *
00005 * Redistribution and use in source and binary forms, with or without
00006 * modification, are permitted provided that the following conditions are met:
00007 *
00008 *  - Redistributions of source code must retain the above copyright notice,
00009 *    this list of conditions and the following disclaimer.
00010 *
00011 *  - Redistributions in binary form must reproduce the above copyright notice,
00012 *    this list of conditions and the following disclaimer in the documentation
00013 *    and/or other materials provided with the distribution.
00014 *
00015 *  - Neither the name of Vintela, Inc., Novell, Inc., nor the names of its
00016 *    contributors may be used to endorse or promote products derived from this
00017 *    software without specific prior written permission.
00018 *
00019 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
00020 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00021 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00022 * ARE DISCLAIMED. IN NO EVENT SHALL Vintela, Inc., Novell, Inc., OR THE 
00023 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
00024 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
00025 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 
00026 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
00027 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 
00028 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
00029 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00030 *******************************************************************************/
00031 
00032 
00037 #ifndef BLOCXX_NON_RECURSIVE_MUTEXLOCK_HPP_INCLUDE_GUARD_
00038 #define BLOCXX_NON_RECURSIVE_MUTEXLOCK_HPP_INCLUDE_GUARD_
00039 #include "blocxx/BLOCXX_config.h"
00040 #include "blocxx/NonRecursiveMutex.hpp"
00041 #include <cassert>
00042 
00043 namespace BLOCXX_NAMESPACE
00044 {
00045 
00047 class BLOCXX_COMMON_API NonRecursiveMutexLock
00048 {
00049 public:
00050    explicit NonRecursiveMutexLock(NonRecursiveMutex& mutex, bool initially_locked=true)
00051       : m_mutex(&mutex), m_locked(false)
00052    {
00053       if (initially_locked)
00054       {
00055          lock();
00056       }
00057    }
00058    ~NonRecursiveMutexLock()
00059    {
00060       try
00061       {
00062          if (m_locked)
00063          {
00064             release();
00065          }
00066       }
00067       catch (...)
00068       {
00069          // don't let exceptions escape
00070       }
00071    }
00072    void lock()
00073    {
00074       assert(m_locked == false);
00075       m_mutex->acquire();
00076       m_locked = true;
00077    }
00078    void release()
00079    {
00080       assert(m_locked == true);
00081       m_mutex->release();
00082       m_locked = false;
00083    }
00084    NonRecursiveMutexLock(const NonRecursiveMutexLock& arg)
00085       : m_mutex(arg.m_mutex), m_locked(arg.m_locked)
00086    {
00087       arg.m_locked = false;
00088    }
00089    bool isLocked() const
00090    {
00091       return m_locked;
00092    }
00093    /*
00094    NonRecursiveMutexLock& operator= (const NonRecursiveMutexLock& arg)
00095    {
00096       release();
00097       m_locked = arg.m_locked;
00098       m_mutex = arg.m_mutex;
00099       arg.m_locked = false;
00100       return *this;
00101    }
00102    */
00103 private:
00104    NonRecursiveMutex* m_mutex;
00105    mutable bool m_locked;
00106    friend class Condition;
00107 };
00108 
00109 } // end namespace BLOCXX_NAMESPACE
00110 
00111 #endif

Generated on Fri Jun 16 15:39:08 2006 for blocxx by  doxygen 1.4.6