Utils/state_machine.cpp.old at master · RhobanProject/Utils · GitHub

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/** ***************************************************************************
 *  \file    state_machine.cpp
 *  \author  Hugo Gimbert - Olivier Ly
 *  \date    2010-12
 *
 *  \brief   State machine infrastructure.
 *****************************************************************************/
#include "state_machine.h"
#include <list>

using namespace std;

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

int StateMachine::reset() {
	init();
	if (init_state == NULL) return 0;
	active_state = init_state;
	init_state->entry();
	return 1;
}

int StateMachine::tic() {

	// checks preconditions
	if (active_state==NULL) return -1;

	if (!(active_state->is_sleeping())) {
		active_state->activity();
		this->activity();
	};

	// check transition
	State * new_state = active_state->transition();
	if (new_state != NULL) { // there is a transition
		active_state->quit();
		active_state = new_state;
		active_state->entry();
	}

	if (active_state->terminal()) return 0;
	else return 1;
}

StateMachine::StateMachine() : init_state(NULL), active_state(NULL) {}


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