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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\Stopwatch;
use Symfony\Contracts\Service\ResetInterface;
/**
* Stopwatch provides a way to profile code.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class Stopwatch implements ResetInterface
{
/**
* @var bool
*/
private $morePrecision;
/**
* @var Section[]
*/
private $sections;
/**
* @var Section[]
*/
private $activeSections;
/**
* @param bool $morePrecision If true, time is stored as float to keep the original microsecond precision
*/
public function __construct(bool $morePrecision = false)
{
$this->morePrecision = $morePrecision;
$this->reset();
}
/**
* @return Section[]
*/
public function getSections()
{
return $this->sections;
}
/**
* Creates a new section or re-opens an existing section.
*
* @param string|null $id The id of the session to re-open, null to create a new one
*
* @throws \LogicException When the section to re-open is not reachable
*/
public function openSection($id = null)
{
$current = end($this->activeSections);
if (null !== $id && null === $current->get($id)) {
throw new \LogicException(sprintf('The section "%s" has been started at an other level and can not be opened.', $id));
}
$this->start('__section__.child', 'section');
$this->activeSections[] = $current->open($id);
$this->start('__section__');
}
/**
* Stops the last started section.
*
* The id parameter is used to retrieve the events from this section.
*
* @see getSectionEvents()
*
* @param string $id The identifier of the section
*
* @throws \LogicException When there's no started section to be stopped
*/
public function stopSection($id)
{
$this->stop('__section__');
if (1 == \count($this->activeSections)) {
throw new \LogicException('There is no started section to stop.');
}
$this->sections[$id] = array_pop($this->activeSections)->setId($id);
$this->stop('__section__.child');
}
/**
* Starts an event.
*
* @param string $name The event name
* @param string|null $category The event category
*
* @return StopwatchEvent
*/
public function start($name, $category = null)
{
return end($this->activeSections)->startEvent($name, $category);
}
/**
* Checks if the event was started.
*
* @param string $name The event name
*
* @return bool
*/
public function isStarted($name)
{
return end($this->activeSections)->isEventStarted($name);
}
/**
* Stops an event.
*
* @param string $name The event name
*
* @return StopwatchEvent
*/
public function stop($name)
{
return end($this->activeSections)->stopEvent($name);
}
/**
* Stops then restarts an event.
*
* @param string $name The event name
*
* @return StopwatchEvent
*/
public function lap($name)
{
return end($this->activeSections)->stopEvent($name)->start();
}
/**
* Returns a specific event by name.
*
* @param string $name The event name
*
* @return StopwatchEvent
*/
public function getEvent($name)
{
return end($this->activeSections)->getEvent($name);
}
/**
* Gets all events for a given section.
*
* @param string $id A section identifier
*
* @return StopwatchEvent[]
*/
public function getSectionEvents($id)
{
return isset($this->sections[$id]) ? $this->sections[$id]->getEvents() : [];
}
/**
* Resets the stopwatch to its original state.
*/
public function reset()
{
$this->sections = $this->activeSections = ['__root__' => new Section(null, $this->morePrecision)];
}
}
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