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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* simulation.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: dkaiser <dkaiser@student.42heilbronn.de +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2025/01/17 14:38:04 by dkaiser #+# #+# */
/* Updated: 2025/01/18 17:09:34 by dkaiser ### ########.fr */
/* */
/* ************************************************************************** */
#include "philo.h"
int philo_die(t_philo *philo)
{
if (ft_cur_time_in_ms() > philo->last_time_eaten + philo->data->time_to_die)
{
philo->is_alive = 0;
ft_log(philo->id, "has died");
philo->data->simulation_running = 0;
return (1);
}
return (0);
}
void philo_eat(t_philo *philo)
{
t_fork *left_fork;
t_fork *right_fork;
int started_eating;
int tte;
left_fork = &philo->data->forks[philo->id - 1];
right_fork = &philo->data->forks[philo->id % philo->data->nbr_of_philos];
while (!left_fork->available || !right_fork->available)
{
if (!philo->data->simulation_running)
return;
if (philo_die(philo))
return ;
usleep(1000);
}
pthread_mutex_lock(&left_fork->mutex);
pthread_mutex_lock(&right_fork->mutex);
if (philo->data->simulation_running)
{
left_fork->available = 0;
ft_log(philo->id, "has taken a fork");
right_fork->available = 0;
ft_log(philo->id, "has taken a fork");
started_eating = ft_cur_time_in_ms();
tte = philo->data->time_to_eat;
philo->last_time_eaten = started_eating;
philo->times_must_eat -= 1;
ft_log(philo->id, "is eating");
while (ft_cur_time_in_ms() < started_eating + tte)
{
if (philo_die(philo))
return;
usleep(1000);
}
left_fork->available = 1;
right_fork->available = 1;
}
pthread_mutex_unlock(&left_fork->mutex);
pthread_mutex_unlock(&right_fork->mutex);
}
void philo_sleep(t_philo *philo)
{
int started_sleeping;
int tts;
started_sleeping = ft_cur_time_in_ms();
tts = philo->data->time_to_sleep;
ft_log(philo->id, "is sleeping");
while (ft_cur_time_in_ms() < started_sleeping + tts)
{
if (philo_die(philo))
return;
usleep(1000);
}
}
void philo_think(t_philo *philo)
{
ft_log(philo->id, "is thinking");
}
int *process_philo(void *arg)
{
t_philo *philo;
int *result;
result = malloc(sizeof(int));
if (result == NULL)
return (NULL);
philo = (t_philo *)arg;
*result = EXIT_SUCCESS;
while (philo->data->simulation_running)
{
philo_eat(philo);
if (philo->times_must_eat == 0)
{
pthread_mutex_lock(&philo->data->pme_mutex);
philo->data->philos_must_eat -= 1;
pthread_mutex_unlock(&philo->data->pme_mutex);
}
if (!philo->data->simulation_running)
break;
philo_sleep(philo);
if (!philo->data->simulation_running)
break;
philo_think(philo);
}
return (result);
}
int run_simulation(int nbr_of_philos, t_philo *philos, t_phdata *data)
{
int i;
int result;
void *retval;
i = 0;
result = EXIT_SUCCESS;
while (i < nbr_of_philos)
{
result = pthread_create(&(philos[i].thread), NULL, (void*) process_philo, &philos[i]);
if (result != 0)
break;
i++;
}
while (data->simulation_running)
{
if (data->philos_must_eat <= 0)
data->simulation_running = 0;
}
while (i--)
{
pthread_join(philos[i].thread, &retval);
if (retval == NULL)
result = ft_err(ERR_MALLOC);
else if (*(int *)retval != EXIT_SUCCESS)
{
result = *(int *)retval;
free(retval);
}
}
return (result);
}
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