beemutex.h

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/***********************************************************************
 Copyright (c) 2004 Beeyond Software Holding BV and (c) 2007-2008
 by Educational Technology Resources, Inc.  Others may also hold
 copyrights on code in this file.  See the CREDITS.txt file in the
 top directory of the distribution for details.

 This file is part of MySQL++.

 MySQL++ 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 2.1 of the License, or
 (at your option) any later version.

 MySQL++ 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 MySQL++; if not, write to the Free Software
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
 USA
***********************************************************************/

#if !defined(MYSQLPP_BEEMUTEX_H)
#define MYSQLPP_BEEMUTEX_H

#include "exceptions.h"

namespace mysqlpp {

class MYSQLPP_EXPORT BeecryptMutex
{
public:
        BeecryptMutex() throw (MutexFailed);

        ~BeecryptMutex();

        void lock() throw (MutexFailed);

        bool trylock() throw (MutexFailed);

        void unlock() throw (MutexFailed);

private:
        void* pmutex_;
};



class ScopedLock
{
public:
        explicit ScopedLock(BeecryptMutex& mutex) :
        mutex_(mutex)
        {
                mutex.lock();
        }

        ~ScopedLock() { mutex_.unlock(); }

private:
        ScopedLock(const ScopedLock&);                          // can't copy
        ScopedLock& operator =(const ScopedLock&);      // can't assign

        BeecryptMutex& mutex_;  
};

} // end namespace mysqlpp

#endif // !defined(MYSQLPP_BEEMUTEX_H)