Lock.h

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/*
 * Copyright (c) [2004-2009] Novell, Inc.
 *
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as published
 * by the Free Software Foundation.
 *
 * This program 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 this program; if not, contact Novell, Inc.
 *
 * To contact Novell about this file by physical or electronic mail, you may
 * find current contact information at www.novell.com.
 */


#ifndef LOCK_H
#define LOCK_H


#include <stdexcept>
#include <boost/noncopyable.hpp>


namespace storage
{

    class LockException : public std::exception
    {

    public:

        LockException(pid_t locker_pid);
        virtual ~LockException() throw();

        pid_t getLockerPid() const { return locker_pid; }

    protected:

        pid_t locker_pid;

    };


    class Lock : boost::noncopyable
    {

    public:

        Lock(bool readonly, bool disable = false);
        ~Lock() throw();

    private:

        const bool disabled;
        int fd;

    };
}


#endif