Philosophers/philo/philo_utils.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   philo_utils.c                                      :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: narnaud@student.42nice.fr <marvin@42.fr>   +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2022/05/18 19:10:41 by narnaud@stude     #+#    #+#             */
/*   Updated: 2022/05/19 00:50:56 by narnaud@stude    ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "philo.h"

int	is_running(t_room *room)
{
	int	ret;

	pthread_mutex_lock(room->lock);
	ret = room->running;
	pthread_mutex_unlock(room->lock);
	return (ret);
}

int	safe_print(t_philo *philo, char *str)
{
	int	ret;

	ret = is_running(philo->room);
	if (!ret)
		return (0);
	pthread_mutex_lock(philo->room->lock);
	printf(str, room_clock(), philo->id);
	pthread_mutex_unlock(philo->room->lock);
	return (ret);
}

int	safe_wait(t_room *room, int start, int duration)
{
	int	ret;

	ret = is_running(room);
	while (ret && (room_clock()
			< (start + room->param[duration])))
	{
		ret = is_running(room);
		usleep(50);
	}
	return (ret);
}

int	room_clock(void)
{
	struct timeval	time;
	int				ret;
	static long int	start_time = 0;

	gettimeofday(&time, NULL);
	if (!start_time)
		start_time = time.tv_sec * 1000 + time.tv_usec / 1000;
	ret = (int)(time.tv_sec * 1000 + time.tv_usec / 1000 - start_time);
	return (ret);
}

int	mini_atoi(char	*nbr)
{
	int	ret;

	ret = 0;
	while (*nbr >= '0' && *nbr <= '9')
	{
		ret = (*nbr - '0') + (10 * ret);
		nbr++;
	}
	return (ret);
}