mutex.h

/*
 * mutex.h
 * This file is part of dbPager Classes Library (DCL)
 *
 * Copyright (c) 2008 Dennis Prochko <wolfsoft@mail.ru>
 *
 * DCL is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation version 3.
 *
 * DCL 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with DCL; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor,
 * Boston, MA  02110-1301  USA
 */

#ifndef _MUTEX_H_
#define _MUTEX_H_

#include <dcl/exception.h>

namespace dbp {


class mutex_exception: public dbp::exception {
public:
        mutex_exception(const std::string &msg = "") throw():
          dbp::exception(msg) { }
};

class mutex_int {
        friend class mutex;
        friend class event;
public:
        virtual ~mutex_int() { }
        virtual void enter() = 0;
        virtual bool try_enter() = 0;
        virtual void leave() = 0;
protected:
        virtual void* handle() = 0;
};


class mutex: public mutex_int {
        friend class event;
public:
        mutex();
        virtual ~mutex();

        virtual void enter();

        virtual bool try_enter();

        virtual void leave();
protected:
        virtual void* handle();
private:
        mutex_int *pimpl;
};


class mutex_guard {
public:

        mutex_guard(mutex&);

        virtual ~mutex_guard();
private:
        mutex &_mutex;
};

} //namespace

#endif /*_MUTEX_H_*/