Philosophers/philo/philo_life.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   philo_life.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: narnaud <narnaud@student.42.fr>            +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2021/11/26 07:43:48 by narnaud           #+#    #+#             */
/*   Updated: 2022/05/20 08:35:19 by narnaud          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "philo.h"

static int	eat(t_room *room, t_philo *philo)
{
	pthread_mutex_lock(philo->fork);
	if (!safe_print(philo, "%d %d has taken a fork\n")
			|| !philo->fork_r)
		return (1);
	pthread_mutex_lock(philo->fork_r);
	safe_print(philo, "%d %d has taken a fork\n");
	if (!safe_print(philo, "%d %d is eating\n"))
		return (2);
	pthread_mutex_lock(philo->lock);
	philo->eat_time = room_clock();
	pthread_mutex_unlock(philo->lock);
	if (!safe_wait(room, room_clock(), EAT_DURATION))
		return (2);
	pthread_mutex_unlock(philo->fork);
	pthread_mutex_unlock(philo->fork_r);
	pthread_mutex_lock(philo->lock);
	philo->eat_amount++;
	pthread_mutex_unlock(philo->lock);
	return (0);
}

void	*philos_life(void *ph)
{
	t_philo		*philo;
	int			stop;

	philo = (t_philo *)ph;
	while (1)
	{
		stop = eat(philo->room, philo);
		if (stop)
			break ;
		if (!safe_print(philo, "%d %d is sleeping\n"))
			break ;
		if (!safe_wait(philo->room, room_clock(), SLEEP_DURATION))
			break ;
		if (!safe_print(philo, "%d %d is thinking\n"))
			break ;
	}
	if (stop > 0)
		pthread_mutex_unlock(philo->fork);
	if (stop > 1)
		pthread_mutex_unlock(philo->fork_r);
	return (NULL);
}