//
// Created by Antoine Bartuccio on 06/06/2018.
//

#include "SharedData.h"

SETTER(SharedData, Building *, main_building)

void wait_threads_SharedData(THIS(SharedData)){
	int i;
	for (i=0; i<this->threads_nb; i++)
		pthread_join(this->threads[i], NULL);
}

int call_elevator_SharedData(THIS(SharedData), int starting_floor, int destination_floor){
	/* Make the thread wait for an elevator available and return the id of the elevator available */
	if (this->main_building == NULL)
		CRASH("No building attached to shared data, you cannot call an elevator\n");
	if (starting_floor < 0)
		CRASH("You cannot start from a floor lower than 0\n");
	if (destination_floor > FLOORS)
		CRASH("You are trying to reach a floor higher than the highest floor\n");

	return 0;
}

void _free__SharedData(THIS(SharedData)){
	int i;
	if (this->threads != NULL){
		for (i=0; i<this->threads_nb; i++)
			pthread_cancel(this->threads[i]);
		free(this->threads);
	}
	if (this->main_building != NULL)
		DELETE(this->main_building);

	free(this);
}

SharedData *_get_instance_SharedData(){
	static SharedData * new_shared_data = NULL;
	if (new_shared_data == NULL){
		new_shared_data = malloc_or_die(sizeof(SharedData));

		new_shared_data->threads = NULL;
		new_shared_data->main_building = NULL; /* Should be set to NULL if freed */
		new_shared_data->threads_nb = 0;

		LINK_ALL(SharedData, new_shared_data,
				 wait_threads,
				 set_main_building,
				 call_elevator
		);
	}
	return new_shared_data;
}