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103 lines
2.8 KiB
103 lines
2.8 KiB
3 years ago
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/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* philo.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: narnaud <narnaud@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2022/05/16 14:03:42 by narnaud #+# #+# */
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/* Updated: 2022/05/16 14:03:47 by narnaud ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "philosophers.h"
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void *check_halt(void * p)
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{
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size_t time;
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t_philo *philo;
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philo = p;
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while (1)
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{
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usleep(1000);
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time = gettime();
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philo->table->time = time;
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if (time - philo->last_meal_time > philo->table->time_to_die)
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{
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printf("%lu %d died\n", time, philo->id);
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exit(EXIT_SUCCESS);
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}
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}
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}
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void philo_life(t_philo *philo)
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{
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t_table *table;
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table = philo->table;
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while (1)
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{
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sem_wait(table->sptr);
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printf("%lu %d has taken a fork\n", table->time, philo->id);
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sem_wait(table->sptr);
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printf("%lu %d has taken a fork\n", table->time, philo->id);
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philo->last_meal_time = table->time;
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printf("%lu %d is eating\n", table->time, philo->id);
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usleep(table->eating_time * 1000);
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sem_post(table->sptr);
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sem_post(table->sptr);
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printf("%lu %d is sleeping\n", table->time, philo->id);
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usleep(table->sleeping_time * 1000);
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printf("%lu %d is thinking\n", table->time, philo->id);
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}
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}
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void init_philos(t_table *table)
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{
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size_t i;
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pthread_t checks;
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table->pid = malloc(sizeof(pid_t) * table->nb_of_philos);
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memset(table->pid, 0, sizeof(pid_t) * table->nb_of_philos);
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i = 0;
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while (i < table->nb_of_philos)
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{
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table->pid[i] = fork();
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table->philos[i].table = table;
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table->philos[i].id = i;
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if (!table->pid[i])
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{
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pthread_create(&checks, NULL, check_halt, table->philos + i);
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philo_life(table->philos + i);
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}
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usleep(500);
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i++;
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}
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}
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int main(int argc, char **argv)
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{
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static t_table *table;
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static size_t i = 0;
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int status;
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sem_unlink("/chopsticks");
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sem_unlink("/death");
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if (argc < 5 || argc > 6)
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return (1);
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table = parsing(argv + 1);
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table->sptr = sem_open("/chopsticks", O_CREAT, 0664, table->nb_of_philos);
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table->death = sem_open("/death", O_CREAT, 0664, 1);
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init_philos(table);
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waitpid(-1, &status, 0);
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while (i < table->nb_of_philos)
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{
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kill(table->pid[i], SIGINT);
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i++;
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}
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sem_unlink("/chopsticks");
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sem_unlink("/deaths");
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return(0);
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}
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