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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* routine.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: cacharle <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/02/14 23:00:07 by cacharle #+# #+# */
/* Updated: 2021/01/10 13:39:51 by cacharle ### ########.fr */
/* */
/* ************************************************************************** */
#include "philo_two.h"
static void *st_routine_death(t_philo *arg)
{
while (true)
{
sem_wait(arg->sem_eat);
if (h_time_now() - arg->time_last_eat > arg->conf->timeout_death)
break ;
sem_post(arg->sem_eat);
usleep(2000);
}
event_die(arg);
return (NULL);
}
static void st_check_meal_num_finished(t_philo *arg, long int eat_counter)
{
if (arg->conf->meal_num != -1 && eat_counter == arg->conf->meal_num)
{
sem_wait(arg->conf->sem_stdout);
sem_post(arg->conf->sem_meal_num);
sem_post(arg->conf->sem_stdout);
}
}
void *routine_philo(t_philo *arg)
{
long int eat_counter;
pthread_t thread_death;
eat_counter = 0;
sem_wait(arg->conf->sem_start);
arg->time_last_eat = h_time_now();
if (pthread_create(
&thread_death, NULL, (t_routine)st_routine_death, arg) != 0)
return (NULL);
pthread_detach(thread_death);
arg->time_last_eat = h_time_now();
while (true)
{
sem_wait(arg->conf->sem_grab);
event_take_fork(arg);
event_take_fork(arg);
sem_post(arg->conf->sem_grab);
event_eat(arg);
eat_counter++;
st_check_meal_num_finished(arg, eat_counter);
event_sleep(arg);
event_think(arg);
}
return (NULL);
}
t_philo *routine_create_philos(t_philo_conf *conf)
{
long int i;
t_philo *philos;
const char *name;
if ((philos = malloc(sizeof(t_philo) * conf->philo_num)) == NULL)
return (NULL);
i = -1;
while (++i < conf->philo_num)
{
philos[i].id = i + 1;
philos[i].conf = conf;
name = philo_sem_eat_name(PHILO_SEM_EAT_PREFIX, philos[i].id);
sem_unlink(name);
philos[i].sem_eat = sem_open(name, O_CREAT | O_EXCL, 0700, 1);
if (philos[i].sem_eat == SEM_FAILED)
{
while (i-- > 0)
sem_unlink(philo_sem_eat_name(
PHILO_SEM_EAT_PREFIX, philos[i].id));
free(philos);
return (NULL);
}
}
return (philos);
}
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