lockfile.h

/*
 * GearBox Project: Peer-Reviewed Open-Source Libraries for Robotics
 *               http://gearbox.sf.net/
 * Copyright (c) 2004-2010 Alex Brooks
 *
 * This distribution is licensed to you under the terms described in
 * the LICENSE file included in this distribution.
 *
 */
#ifndef GBXSERIALACFR_LOCKFILE_H
#define GBXSERIALACFR_LOCKFILE_H

#include <unistd.h>
#include <exception>
#include <string>

namespace gbxserialacfr {
namespace lockfile {

class LockFileException : public std::exception
{ 
    std::string  message_;
public:
    LockFileException( const std::string &message )
        : message_(message) {}
    ~LockFileException()throw(){}
    virtual const char* what() const throw() { return message_.c_str(); }
};

class LockedByOtherProcessException : public LockFileException
{
public:
    LockedByOtherProcessException( const std::string &message )
        : LockFileException(message) {}
    ~LockedByOtherProcessException()throw(){}
};

class LockFile {
public:

    LockFile( const std::string &dev,
              int lockPid = getpid() );
    ~LockFile();

private:

    const std::string dev_;
    const int lockPid_;

};

}
}
#endif