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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* main.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: cacharle <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/02/14 22:45:23 by cacharle #+# #+# */
/* Updated: 2021/01/03 13:54:45 by cacharle ### ########.fr */
/* */
/* ************************************************************************** */
#include "philo_two.h"
#define PHILO_SEM_NAME "semaphore_philo_two"
#define PHILO_SEM_STDOUT_NAME "semaphore_philo_two_stdout"
#define PHILO_SEM_FINISH_NAME "semaphore_philo_two_finish"
static int st_destroy(
t_philo *philos,
pthread_t *threads)
{
sem_unlink(PHILO_SEM_NAME);
sem_unlink(PHILO_SEM_STDOUT_NAME);
sem_unlink(PHILO_SEM_FINISH_NAME);
free(philos);
free(threads);
return (1);
}
static bool st_sem_create(const char *name, unsigned int value, sem_t **sem)
{
sem_unlink(name);
return ((*sem = sem_open(name, O_CREAT | O_EXCL, 0700, value))
!= SEM_FAILED);
}
static int st_setup(
t_philo_conf *conf,
t_philo **philos,
sem_t **forks,
pthread_t **threads)
{
long int i;
if (!st_sem_create(PHILO_SEM_NAME, conf->philo_num, forks) ||
!st_sem_create(PHILO_SEM_STDOUT_NAME, 1, &conf->sem_stdout) ||
!st_sem_create(PHILO_SEM_FINISH_NAME,
conf->meal_num == -1 ? 1 : conf->philo_num, &conf->sem_finish))
return (1);
*threads = NULL;
if ((*philos = routine_create_philos(conf, *forks)) == NULL ||
(*threads = malloc(sizeof(pthread_t) * conf->philo_num)) == NULL)
return (st_destroy(*philos, *threads));
conf->initial_time = h_time_now();
i = -1;
while (++i < conf->philo_num)
{
if (pthread_create(*threads + i, NULL,
(t_routine)routine_philo, *philos + i) != 0)
{
while (--i >= 0)
pthread_detach((*threads)[i]);
return (st_destroy(*philos, *threads));
}
usleep(200);
}
return (0);
}
static void st_wait(t_philo_conf *conf)
{
long int i;
if (conf->meal_num == -1)
{
sem_wait(conf->sem_finish);
sem_wait(conf->sem_finish);
}
else
{
i = -1;
while (++i < conf->philo_num)
sem_wait(conf->sem_finish);
i = -1;
while (++i < conf->philo_num)
sem_wait(conf->sem_finish);
}
}
int main(int argc, char **argv)
{
long int i;
t_philo_conf conf;
t_philo *philos;
sem_t *forks;
pthread_t *threads;
if (!parse_args((t_philo_args *)&conf, argc, argv))
return (1);
if (conf.philo_num == 0 || conf.meal_num == 0)
return (0);
if (st_setup(&conf, &philos, &forks, &threads) != 0)
return (1);
st_wait(&conf);
i = -1;
while (++i < conf.philo_num)
pthread_detach(threads[i]);
st_destroy(philos, threads);
return (0);
}
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