time_utils.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   time_utils.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: dporhomo <dporhomo@student.42prague.com    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2026/06/07 19:38:52 by dporhomo          #+#    #+#             */
/*   Updated: 2026/06/14 01:37:25 by dporhomo         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

/* Time management utils */

#include "codexion.h"

/* timeeval - time in sec (tv_sec) and ms (tv_usec)*/
/* tv_sec: seconds since Epoch, tv_usec: microseconds in last second*/
long long	get_current_time(void)
{
	struct timeval	tv;

	if (gettimeofday(&tv, NULL) == -1)
		return (-1);
	return ((tv.tv_sec * 1000) + (tv.tv_usec / 1000));
}

/* sleeps for time_in_ms in 500 microsec intervals*/
void	ft_usleep(long long time_in_ms)
{
	long long	start;

	start = get_current_time();
	while ((get_current_time() - start) < time_in_ms)
		usleep(500);
}

/* Converts an absolute time in ms to sc */
/* ms to sec */
/* micros % to 0, remaining ml to nanosec*/
struct timespec	ms_to_timespec(long long target_time_ms)
{
	struct timespec	ts;

	ts.tv_sec = target_time_ms / 1000;
	ts.tv_nsec = (target_time_ms % 1000) * 1000000;
	return (ts);
}