Philosophers/philo/philo_launcher.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   philo_launcher.c                                   :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: narnaud <narnaud@student.42.fr>            +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2021/11/24 15:44:04 by narnaud           #+#    #+#             */
/*   Updated: 2022/05/16 18:04:42 by narnaud          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "philosophers.h"

int	waiter(t_room	*room);

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

	if (argc < 5 || argc > 6)
		return (1);
	room = init_room(argv + 1);
	while (room->i >= 0)
	{	
		pthread_mutex_lock(room->safe);
		if (room->i >= room->param->philo_amount)
			room->i -= 1 + (room->param->philo_amount % 2) * 2;
		pthread_create(room->philos[room->i]->thd, NULL, \
			philos_life, (void *)room);
		pthread_detach(*room->philos[room->i]->thd);
		pthread_mutex_unlock(room->safe);
		usleep(CLOCK_ONE);
		pthread_mutex_lock(room->safe);
		if ((room->i % 2) == 0)
			room->i += 2;
		else if ((room->i % 2) == 1)
			room->i -= 2;
		pthread_mutex_unlock(room->safe);
	}
	while (!waiter(room))
		usleep(CLOCK_TWO);
	return (clean_memory(room));
}

int	waiter(t_room *room)
{
	t_param *param;
	int		i;
	int		starvest;

	pthread_mutex_lock(room->safe);
	i = 0;
	param = room->param;
	starvest = param->eat_amount;	
	while (i < param->philo_amount)
	{
		pthread_mutex_lock(room->philos[i]->safe);
		if (room->philos[i]->eat_time + param->die_time < gettime())
		{
			safe_print("%ld %d died\n", room, i);
			room->running = 0;
			return (1);
		}
		if (room->philos[i]->eat_amount < starvest)
			starvest = room->philos[i]->eat_amount;
		pthread_mutex_unlock(room->philos[i]->safe);
		i++;
	}
	if (starvest == param->eat_amount)
		room->running = 0;
	pthread_mutex_unlock(room->safe);
	return (!room->running);
}