philo/philo.c at master · benemanu/philo · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   philo.c                                            :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: bhielsch <marvin@42.fr>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/02/08 15:51:07 by bhielsch          #+#    #+#             */
/*   Updated: 2023/02/08 15:56:33 by bhielsch         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "philo.h"

void	*routine(void *arg)
{
	t_philo	*philo;

	philo = (t_philo *)arg;
	philo->time_to_die = philo->data->tt_die + current_timestamp();
	while (is_philo_dead(philo->data) == 0)
	{
		if (finished_eating(philo->data, philo->id) == 0)
		{
			if (is_philo_dead(philo->data) == 0)
				data_plus(philo->data);
		}
		if (is_equal(philo->data) == 0)
			my_free(philo->data);
		if (take_fork(philo) == 0)
		{
			pthread_mutex_lock(&philo->lock);
			philo->time_to_die = current_timestamp() + philo->data->tt_die;
			pthread_mutex_unlock(&philo->lock);
			philo_eats(philo);
		}
	}
	return ((void *)0);
}

int	take_fork(t_philo *philo)
{
	int	ind;

	ind = 1;
	if (is_philo_dead(philo->data) == 0)
	{
		lock_forks1(philo->data, philo->id);
		ind = 0;
	}
	if (is_philo_dead(philo->data) == 0)
		lock_forks2(philo->data, philo->id);
	else
	{
		if (philo->id % 2 == 0)
			pthread_mutex_unlock(philo->rf);
		else
			pthread_mutex_unlock(philo->lf);
		ind = 1;
	}
	return (ind);
}

void	philo_eats(t_philo *philo)
{
	print(philo->data, "is eating\n", philo->id);
	philo->eat_count++;
	ft_usleep(philo->data->tt_eat);
	pthread_mutex_unlock(philo->lf);
	pthread_mutex_unlock(philo->rf);
	print(philo->data, "is sleeping\n", philo->id);
	ft_usleep(philo->data->tt_sleep);
	print(philo->data, "is thinking\n", philo->id);
}

int	one_philo(t_data *data)
{
	print(data, "has taken a fork\n", 1);
	ft_usleep(data->tt_die);
	print(data, "died\n", 1);
	pthread_mutex_destroy(&data->lock);
	exit(0);
}

int	init_thread(t_data *data)
{
	int	i;

	i = -1;
	data->start_time = current_timestamp();
	while (++i < data->no_philos)
	{
		if (pthread_create(&data->tid[i], NULL, &routine, &data->philos[i]))
			return (1);
		ft_usleep(1);
	}
	return (0);
}