131 lines
3.7 KiB
C
131 lines
3.7 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* main.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: apommier <apommier@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2022/02/20 19:10:43 by apommier #+# #+# */
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/* Updated: 2022/02/20 19:10:43 by apommier ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "philosophers.h"
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void philo_eat(t_philo *philo)
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{
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t_arg *data;
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data = philo->data;
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pthread_mutex_lock(philo->left_fork);
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put_event(data, philo->philo_id, "has taken a fork");
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pthread_mutex_lock(philo->right_fork);
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put_event(data, philo->philo_id, "has taken a fork");
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pthread_mutex_lock(&philo->eat_check);
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put_event(data, philo->philo_id, "is eating");
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philo->last_eat = get_time();
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pthread_mutex_unlock(&philo->eat_check);
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usleep(data->time_to_eat * 1000);
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pthread_mutex_unlock(philo->left_fork);
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pthread_mutex_unlock(philo->right_fork);
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pthread_mutex_lock(&philo->check_nb_eat);
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philo->nb_eat++;
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pthread_mutex_unlock(&philo->check_nb_eat);
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}
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int check_death(int i, t_philo *philo, t_arg *data, int *death)
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{
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pthread_mutex_lock(&philo[i].eat_check);
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if ((get_time() - philo[i].last_eat) > data->time_to_die)
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{
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pthread_mutex_unlock(&philo[i].eat_check);
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put_event(data, philo[i].philo_id, "is died");
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pthread_mutex_lock(&data->life_check);
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data->death = 0;
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pthread_mutex_unlock(&data->life_check);
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*death = 0;
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printf("End: one philo died\n");
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}
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else
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pthread_mutex_unlock(&philo[i].eat_check);
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usleep(100);
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if (!(*death) || data->must_eat == -1)
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return (0);
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return (is_philo_full(philo, data));
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}
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void death_checker(t_philo *philo, t_arg *data)
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{
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int i;
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int nb_full;
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int death;
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death = 1;
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while (!data->full_philo && death)
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{
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i = -1;
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while (++i < data->nb_philo && death)
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{
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nb_full = check_death(i, philo, data, &death);
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if (nb_full == data->nb_philo)
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{
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pthread_mutex_lock(&data->life_check);
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data->death = 0;
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death = 0;
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data->full_philo = 1;
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pthread_mutex_unlock(&data->life_check);
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printf("End: all philo are full\n");
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}
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}
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}
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printf("return death\n");
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}
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void *routine(void *tmp)
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{
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t_philo *philo;
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t_arg *data;
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philo = (t_philo *)tmp;
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data = philo->data;
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if (philo->philo_id % 2)
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usleep(15000);
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pthread_mutex_lock(&data->life_check);
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while (philo->data->death)
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{
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pthread_mutex_unlock(&data->life_check);
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philo_eat(philo);
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put_event(data, philo->philo_id, "is sleeping");
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usleep(philo->data->time_to_sleep * 1000);
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put_event(data, philo->philo_id, "is thinking");
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pthread_mutex_lock(&data->life_check);
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}
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pthread_mutex_unlock(&data->life_check);
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return (0);
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}
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int start_philo(t_philo *philo, t_arg *data)
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{
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int i;
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i = 0;
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data->time_start = get_time();
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while (i < data->nb_philo)
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{
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philo[i].last_eat = get_time();
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if (pthread_create(&philo[i].thread, 0, &routine, &philo[i]))
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return (1);
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i++;
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}
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death_checker(philo, data);
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i = 0;
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while (i < data->nb_philo)
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{
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printf("start join\n");
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pthread_join(philo[i++].thread, 0);
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printf("i de join= %d\n", i);
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}
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exit_philo(philo, data);
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return (0);
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}
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