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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* main.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: cacharle <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/02/15 00:45:24 by cacharle #+# #+# */
/* Updated: 2021/01/10 13:23:54 by cacharle ### ########.fr */
/* */
/* ************************************************************************** */
#include "philo_three.h"
static sem_t *st_sem_create(char *name, unsigned int value)
{
sem_unlink(name);
return (sem_open(name, O_CREAT | O_EXCL, 0700, value));
}
static int st_destroy(t_philo_conf *conf, pid_t *pids, int philo_num)
{
int i;
if (pids != NULL)
{
i = -1;
while (++i < philo_num)
kill(pids[i], SIGKILL);
free(pids);
}
sem_close(conf->forks);
sem_unlink(PHILO_SEM_NAME);
sem_close(conf->sem_stdout);
sem_unlink(PHILO_SEM_STDOUT_NAME);
sem_close(conf->sem_finish);
sem_unlink(PHILO_SEM_FINISH_NAME);
sem_close(conf->sem_meal_num);
sem_unlink(PHILO_SEM_MEAL_NUM_NAME);
sem_close(conf->sem_start);
sem_unlink(PHILO_SEM_START_NAME);
sem_close(conf->sem_grab);
sem_unlink(PHILO_SEM_GRAB_NAME);
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, pid_t **pids, t_time initial_time)
{
t_philo philo;
int i;
conf->sem_stdout = SEM_FAILED;
conf->sem_finish = SEM_FAILED;
conf->sem_start = SEM_FAILED;
if ((conf->forks = st_sem_create(PHILO_SEM_NAME, conf->philo_num)) == SEM_FAILED
|| (conf->sem_stdout = st_sem_create(PHILO_SEM_STDOUT_NAME, 1)) == SEM_FAILED
|| (conf->sem_finish = st_sem_create(PHILO_SEM_FINISH_NAME, 1)) == SEM_FAILED
|| (conf->sem_meal_num = st_sem_create(PHILO_SEM_MEAL_NUM_NAME, conf->philo_num)) == SEM_FAILED
|| (conf->sem_start = st_sem_create(PHILO_SEM_START_NAME, conf->philo_num)) == SEM_FAILED
|| (conf->sem_grab = st_sem_create(PHILO_SEM_GRAB_NAME, 1)) == SEM_FAILED
|| (*pids = malloc(sizeof(pid_t) * conf->philo_num)) == NULL)
return (st_destroy(conf, *pids, 0));
i = -1;
while (++i < conf->philo_num)
sem_wait(conf->sem_start);
i = -1;
while (++i < conf->philo_num)
{
philo.conf = conf;
philo.id = i + 1;
philo.initial_time = initial_time;
if (((*pids)[i] = child_start(&philo)) == -1)
return (st_destroy(conf, *pids, i));
}
i = -1;
while (++i < conf->philo_num)
sem_post(conf->sem_start);
return (0);
}
static void *st_routine_meal_num(t_philo_conf *conf)
{
long int i;
i = -1;
while (++i < conf->philo_num)
sem_wait(conf->sem_meal_num);
i = -1;
while (++i < conf->philo_num)
sem_wait(conf->sem_meal_num);
sem_wait(conf->sem_stdout);
sem_post(conf->sem_finish);
return (NULL);
}
int main(int argc, char **argv)
{
t_philo_conf conf;
pid_t *pids;
if (!parse_args((t_philo_args*)&conf, argc, argv))
return (1);
if (conf.philo_num == 0 || conf.meal_num == 0)
return (0);
pids = NULL;
if (st_setup(&conf, &pids, h_time_now()) != 0)
return (1);
if (conf.meal_num != -1)
{
pthread_t thread_meal_num;
pthread_create(&thread_meal_num, NULL, (t_routine)st_routine_meal_num, &conf);
pthread_detach(thread_meal_num);
}
sem_wait(conf.sem_finish);
sem_wait(conf.sem_finish);
st_destroy(&conf, pids, conf.philo_num);
return (0);
}
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