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{
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{
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    assert (num_floors > 2);
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    assert (num_floors > 2);
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    assert (num_elevators > 0);
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    assert (num_elevators > 0);
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    elevators = std::vector<Elevator> (num_elevators, Elevator (num_floors));
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    elevators = std::vector<Elevator> (num_elevators, Elevator (num_floors));
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    for (int i=0; i<num_elevators; i++)
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        elevators[i].set_controller (this);
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}
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}
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Controller::~Controller ()
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Controller::~Controller ()
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{
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{
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}
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}
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void Controller::request_elevator (int on_floor, int direction)
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void Controller::request_elevator (int on_floor, int direction)
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{
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{
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    assert (on_floor <= num_floors);
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    assert (on_floor <= num_floors);
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    assert (on_floor > 0);
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    assert (on_floor > 0);
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    assert (direction == MOVE_UP || direction == MOVE_DOWN);
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    float distance = INT_MAX;
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    float distance = INT_MAX;
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    int elevator_number;
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    int elevator_number;
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    // check that there is not already an elevator requested
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    // check that there is not already an elevator requested
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void Controller::enable_elevator (int elevator_number)
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void Controller::enable_elevator (int elevator_number)
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{
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{
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    // make sure elevator is enabled first
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    // make sure elevator is enabled first
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}
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}
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void Controller::start_all_elevators ()
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{
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    int i;
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    for (i=0; i<num_elevators; i++)
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        elevators[i].thread_start ();
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}
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void Controller::stop_all_elevators ()
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{
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    int i;
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    for (i=0; i<num_elevators; i++)
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        elevators[i].thread_stop ();
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}
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void Controller::pause_all_elevators ()
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{
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    int i;
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    for (i=0; i<num_elevators; i++)
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        elevators[i].thread_pause ();
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}
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void Controller::unpause_all_elevators ()
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{
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    int i;
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    for (i=0; i<num_elevators; i++)
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        elevators[i].thread_unpause ();
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}
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