pmutex.h

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/*
 *   P::Classes - Portable C++ Application Framework
 *   Copyright (C) 2000-2003  Christian Prochnow <cproch@seculogix.de>
 *
 *   This library is free software; you can redistribute it and/or
 *   modify it under the terms of the GNU Lesser General Public
 *   License as published by the Free Software Foundation; either
 *   version 2 of the License, or (at your option) any later version.
 *   
 *   This library is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *   Lesser General Public License for more details.
 *   
 *   You should have received a copy of the GNU Lesser General Public
 *   License along with this library; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef _pmutex_h_
#define _pmutex_h_

#include <pclasses/pexport.h>
#include <pclasses/pexception.h>

namespace P {


class PCORE_EXPORT Mutex {
  public:

    Mutex(const char* name = 0) throw(SyncError);


    ~Mutex() throw();


    void lock() throw(SyncError);


    bool tryLock(unsigned int timeout) throw(SyncError);


    void unlock() throw(SyncError);


    class Lock {
      public:
        inline Lock(Mutex& mutex)
        : m_mutex(mutex) { mutex.lock(); }

        ~Lock()
        { m_mutex.unlock(); }

        Lock& operator=(Mutex& mutex)
        {
          m_mutex.unlock();
          m_mutex = mutex;
          m_mutex.lock();
          return *this;
        }

      private:
        Lock(const Lock&);
        Lock& operator=(const Lock&);
        
        Mutex& m_mutex;
    };
    
  private:
    Mutex(const Mutex&);
    Mutex& operator=(const Mutex&);
 
    struct mutex_handle_t;
    mutex_handle_t* m_handle;
};

}

#endif

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