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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 12:26:53 by dkaiser ### ########.fr */
/* */
/* ************************************************************************** */
#include "philo.h"
int eat(t_philo *philo)
{
t_fork *left_fork;
t_fork *right_fork;
left_fork = &philo->data->forks[philo->id];
right_fork = &philo->data->forks[(philo->id + 1) % philo->data->nbr_of_philos];
if (left_fork->available && right_fork->available)
{
pthread_mutex_lock(&left_fork->mutex);
pthread_mutex_lock(&right_fork->mutex);
left_fork->available = 0;
right_fork->available = 0;
printf("Philo %d is eating\n", philo->id);
usleep(1000000);
left_fork->available = 1;
right_fork->available = 1;
pthread_mutex_unlock(&left_fork->mutex);
pthread_mutex_unlock(&right_fork->mutex);
}
return (EXIT_SUCCESS);
}
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)
{
*result = eat(philo);
printf("Philo %d is sleeping\n", philo->id);
usleep(1000000);
//think
}
return (result);
}
int run_simulation(int nbr_of_philos, t_philo *philos)
{
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 (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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