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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Clock;
/**
* A monotonic clock suitable for performance profiling.
*
* @author Nicolas Grekas <p@tchwork.com>
*/
final class MonotonicClock implements ClockInterface
{
private int $sOffset;
private int $usOffset;
private \DateTimeZone $timezone;
public function __construct(\DateTimeZone|string $timezone = null)
{
if (false === $offset = hrtime()) {
throw new \RuntimeException('hrtime() returned false: the runtime environment does not provide access to a monotonic timer.');
}
$time = explode(' ', microtime(), 2);
$this->sOffset = $time[1] - $offset[0];
$this->usOffset = (int) ($time[0] * 1000000) - (int) ($offset[1] / 1000);
if (\is_string($timezone ??= date_default_timezone_get())) {
$this->timezone = new \DateTimeZone($timezone);
} else {
$this->timezone = $timezone;
}
}
public function now(): \DateTimeImmutable
{
[$s, $us] = hrtime();
if (1000000 <= $us = (int) ($us / 1000) + $this->usOffset) {
++$s;
$us -= 1000000;
} elseif (0 > $us) {
--$s;
$us += 1000000;
}
if (6 !== \strlen($now = (string) $us)) {
$now = str_pad($now, 6, '0', \STR_PAD_LEFT);
}
$now = '@'.($s + $this->sOffset).'.'.$now;
return (new \DateTimeImmutable($now, $this->timezone))->setTimezone($this->timezone);
}
public function sleep(float|int $seconds): void
{
if (0 < $s = (int) $seconds) {
sleep($s);
}
if (0 < $us = $seconds - $s) {
usleep((int) ($us * 1E6));
}
}
public function withTimeZone(\DateTimeZone|string $timezone): static
{
$clone = clone $this;
$clone->timezone = \is_string($timezone) ? new \DateTimeZone($timezone) : $timezone;
return $clone;
}
}