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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* main.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: cacharle <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/02/15 00:45:24 by cacharle #+# #+# */
/* Updated: 2021/01/03 14:01:58 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_sems *sems, 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(sems->forks);
sem_unlink(PHILO_SEM_NAME);
sem_close(sems->sem_stdout);
sem_unlink(PHILO_SEM_STDOUT_NAME);
sem_close(sems->sem_finish);
sem_unlink(PHILO_SEM_FINISH_NAME);
return (1);
}
static int st_setup(
t_philo_args *args, t_sems *sems, pid_t **pids, t_time initial_time)
{
t_philo philo;
int i;
sems->sem_stdout = SEM_FAILED;
sems->sem_finish = SEM_FAILED;
if ((sems->forks =
st_sem_create(PHILO_SEM_NAME, args->philo_num)) == SEM_FAILED
|| (sems->sem_stdout =
st_sem_create(PHILO_SEM_STDOUT_NAME, 1)) == SEM_FAILED
|| (sems->sem_finish =
st_sem_create(PHILO_SEM_FINISH_NAME,
args->meal_num == -1 ? 1 : args->philo_num)) == SEM_FAILED
|| (*pids = malloc(sizeof(pid_t) * args->philo_num)) == NULL)
return (st_destroy(sems, *pids, 0));
i = -1;
while (++i < args->philo_num)
{
philo.conf = args;
philo.id = i + 1;
philo.initial_time = initial_time;
if (((*pids)[i] = child_start(&philo)) == -1)
return (st_destroy(sems, *pids, i));
usleep(200);
}
return (0);
}
static void st_wait(t_philo_args *args, t_sems *sems)
{
long int i;
if (args->meal_num == -1)
{
sem_wait(sems->sem_finish);
sem_wait(sems->sem_finish);
}
else
{
i = -1;
while (++i < args->philo_num)
sem_wait(sems->sem_finish);
i = -1;
while (++i < args->philo_num)
sem_wait(sems->sem_finish);
}
}
int main(int argc, char **argv)
{
t_philo_args args;
t_sems sems;
pid_t *pids;
if (!parse_args(&args, argc, argv))
return (1);
if (args.philo_num == 0 || args.meal_num == 0)
return (0);
pids = NULL;
if (st_setup(&args, &sems, &pids, h_time_now()) != 0)
return (1);
st_wait(&args, &sems);
st_destroy(&sems, pids, args.philo_num);
return (0);
}
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