You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
107 lines
2.9 KiB
107 lines
2.9 KiB
/* ************************************************************************** */
|
|
/* */
|
|
/* ::: :::::::: */
|
|
/* philo.c :+: :+: :+: */
|
|
/* +:+ +:+ +:+ */
|
|
/* By: narnaud <narnaud@student.42.fr> +#+ +:+ +#+ */
|
|
/* +#+#+#+#+#+ +#+ */
|
|
/* Created: 2022/05/16 14:03:42 by narnaud #+# #+# */
|
|
/* Updated: 2022/05/20 10:34:10 by narnaud ### ########.fr */
|
|
/* */
|
|
/* ************************************************************************** */
|
|
|
|
#include "philo.h"
|
|
|
|
void *check_halt(void *p)
|
|
{
|
|
int time;
|
|
t_philo *philo;
|
|
|
|
philo = p;
|
|
while (1)
|
|
{
|
|
usleep(1000);
|
|
time = gettime();
|
|
if (time - philo->last_meal_time > philo->table->param[DIE_TIME])
|
|
{
|
|
printf("%i %d died\n", time, philo->id);
|
|
exit(EXIT_SUCCESS);
|
|
}
|
|
if (philo->meals_done == philo->table->param[MEALS_AMOUNT])
|
|
exit(EXIT_SUCCESS);
|
|
}
|
|
}
|
|
|
|
void philo_life(t_philo *philo)
|
|
{
|
|
t_table *table;
|
|
|
|
table = philo->table;
|
|
while (1)
|
|
{
|
|
sem_wait(table->sptr);
|
|
printf("%i %d has taken a fork\n", gettime(), philo->id);
|
|
sem_wait(table->sptr);
|
|
printf("%i %d has taken a fork\n", gettime(), philo->id);
|
|
philo->last_meal_time = gettime();
|
|
printf("%i %d is eating\n", gettime(), philo->id);
|
|
usleep(table->param[EAT_DURATION] * 1000);
|
|
philo->meals_done++;
|
|
sem_post(table->sptr);
|
|
sem_post(table->sptr);
|
|
printf("%i %d is sleeping\n", gettime(), philo->id);
|
|
usleep(table->param[SLEEP_DURATION] * 1000);
|
|
printf("%i %d is thinking\n", gettime(), philo->id);
|
|
}
|
|
}
|
|
|
|
void init_philos(t_table *table)
|
|
{
|
|
int i;
|
|
pthread_t checks;
|
|
int amount;
|
|
|
|
amount = table->param[PHILO_AMOUNT];
|
|
table->pid = malloc(sizeof(pid_t) * amount);
|
|
i = 0;
|
|
while (i < amount)
|
|
{
|
|
table->pid[i] = fork();
|
|
table->philos[i].table = table;
|
|
table->philos[i].id = i;
|
|
table->philos[i].meals_done = 0;
|
|
if (!table->pid[i])
|
|
{
|
|
pthread_create(&checks, NULL, check_halt, table->philos + i);
|
|
philo_life(table->philos + i);
|
|
}
|
|
usleep(500);
|
|
i++;
|
|
}
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
static t_table *table;
|
|
static int i = 0;
|
|
static int status;
|
|
|
|
sem_unlink("/chopsticks");
|
|
sem_unlink("/death");
|
|
if (argc < 5 || argc > 6)
|
|
return (1);
|
|
table = parsing(argv + 1);
|
|
table->sptr = sem_open("/chopsticks", O_CREAT, 0664,
|
|
table->param[PHILO_AMOUNT]);
|
|
table->death = sem_open("/death", O_CREAT, 0664, 1);
|
|
init_philos(table);
|
|
waitpid(-1, &status, 0);
|
|
while (i < table->param[PHILO_AMOUNT])
|
|
{
|
|
kill(table->pid[i], SIGINT);
|
|
i++;
|
|
}
|
|
sem_unlink("/chopsticks");
|
|
sem_unlink("/deaths");
|
|
return (0);
|
|
}
|
|
|