Subversion Repositories programming

/*******************************************************************************

 * elevator.h

 *

 * Header file for the Elevator class.

 *

 * Copyright 2006, Ira W. Snyder (devel@irasnyder.com)

 ******************************************************************************/

#ifndef ELEVATOR_H

#define ELEVATOR_H

#include <cstdio>

#include <iostream>

#include <unistd.h>

#include <assert.h>

#include <vector>

#include <string>

#include <boost/thread/thread.hpp>

#include <boost/bind.hpp>

#include <boost/algorithm/string.hpp>

#include "controller.h"

const int MOVE_UP   = 0;

const int MOVE_DOWN = 1;

const int IDLE      = 2;

const float ELEVATOR_TIME_MOVE_AMOUNT = 0.1;

const int   ELEVATOR_TIME_DELAY_USEC  = 500000;

const int   ELEVATOR_TIME_PAUSE_USEC  = 50000;

class Controller;

class Elevator

{

    public:

        Elevator (int num_floors);

        ~Elevator ();

        // Service Functions

        int floors_above_current ();

        int floors_below_current ();

        void push_button (int floor);

        bool button_is_pushed (int floor);

        // User interaction

        void have_user_enter_buttons ();

        // Getters and Setters

        int get_direction ();

        float get_current_floor ();

        void set_controller (Controller *c);

        // Thread Functions

        void thread_start ();

        void thread_stop ();

        void thread_pause ();

        void thread_unpause ();

    private:

        // Private Functions

        bool near_a_floor ();

        bool near_floor (int floor);

        bool has_floors_to_stop_at ();

        bool should_stop_at_current_floor ();

        void stop_at_floor (int in_direction);

        // Thread Functions

        void run_elevator_logic ();

        static void thread_entry (const Elevator *me);

        // Private Variables

        int num_floors;

        float current_floor;

        int direction;

        std::vector<bool> stop_at_floors;

        Controller *controller;

        // Thread Variable

        bool terminate;

        bool pause;

};

#endif // ELEVATOR_H