Philosophers/philo/philo.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   philo.c                                            :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: narnaud@student.42nice.fr <marvin@42.fr>   +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2022/05/19 00:36:57 by narnaud@stude     #+#    #+#             */
/*   Updated: 2022/05/20 08:39:34 by narnaud          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "philo.h"

static int	waiter(t_room *room, t_philo *philo);
static int	clean_memory(t_room *room, t_philo *philos);

int	main(int argc, char **argv)
{
	t_room		*room;
	t_philo		*philos;

	if (argc < 5 || argc > 6)
		return (EXIT_FAILURE);
	room = create_room(argv + 1);
	philos = create_philos(room);
	invit_philos(philos);
	while (waiter(room, philos))
		usleep(1000);
	pthread_mutex_lock(room->lock);
	room->running = 0;
	pthread_mutex_unlock(room->lock);
	usleep(25000);
	return (clean_memory(room, philos));
}

static int	waiter(t_room *room, t_philo *philo)
{
	int		starvest;
	int		ret;

	ret = 1;
	usleep(1000);
	pthread_mutex_lock(room->lock);
	starvest = room->param[MEALS_AMOUNT];
	while (ret && philo->id >= 0)
	{
		pthread_mutex_lock(philo->lock);
		if ((philo->eat_time + room->param[DIE_TIME]) < room_clock())
		{
			printf("%d %d died\n", room_clock(), philo->id);
			ret = 0;
		}
		if (philo->eat_amount < starvest)
			starvest = philo->eat_amount;
		pthread_mutex_unlock(philo->lock);
		philo++;
	}
	pthread_mutex_unlock(room->lock);
	if (starvest == room->param[MEALS_AMOUNT])
		ret = 0;
	return (ret);
}

static int	clean_memory(t_room *room, t_philo *philos)
{
	static int	i = 0;

	while (i < room->param[PHILO_AMOUNT])
	{	
		pthread_mutex_lock(philos[i].lock);
		pthread_mutex_unlock(philos[i].lock);
		pthread_mutex_destroy(philos[i].lock);
		pthread_mutex_lock(philos[i].fork);
		pthread_mutex_unlock(philos[i].fork);
		pthread_mutex_destroy(philos[i].fork);
		free(philos[i].lock);
		free(philos[i].thd);
		i++;
	}
	pthread_mutex_destroy(room->lock);
	free(room->lock);
	free(room->forks);
	free(philos);
	free(room);
	return (0);
}