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<?php
namespace RectorPrefix202209\React\EventLoop;
/**
* The `Loop` class exists as a convenient way to get the currently relevant loop
*/
final class Loop
{
/**
* @var LoopInterface
*/
private static $instance;
/** @var bool */
private static $stopped = \false;
/**
* Returns the event loop.
* When no loop is set, it will call the factory to create one.
*
* This method always returns an instance implementing `LoopInterface`,
* the actual event loop implementation is an implementation detail.
*
* This method is the preferred way to get the event loop and using
* Factory::create has been deprecated.
*
* @return LoopInterface
*/
public static function get()
{
if (self::$instance instanceof LoopInterface) {
return self::$instance;
}
self::$instance = $loop = Factory::create();
// Automatically run loop at end of program, unless already started or stopped explicitly.
// This is tested using child processes, so coverage is actually 100%, see BinTest.
// @codeCoverageIgnoreStart
$hasRun = \false;
$loop->futureTick(function () use(&$hasRun) {
$hasRun = \true;
});
$stopped =& self::$stopped;
\register_shutdown_function(function () use($loop, &$hasRun, &$stopped) {
// Don't run if we're coming from a fatal error (uncaught exception).
$error = \error_get_last();
if ((isset($error['type']) ? $error['type'] : 0) & (\E_ERROR | \E_CORE_ERROR | \E_COMPILE_ERROR | \E_USER_ERROR | \E_RECOVERABLE_ERROR)) {
return;
}
if (!$hasRun && !$stopped) {
$loop->run();
}
});
// @codeCoverageIgnoreEnd
return self::$instance;
}
/**
* Internal undocumented method, behavior might change or throw in the
* future. Use with caution and at your own risk.
*
* @internal
* @return void
*/
public static function set(LoopInterface $loop)
{
self::$instance = $loop;
}
/**
* [Advanced] Register a listener to be notified when a stream is ready to read.
*
* @param resource $stream
* @param callable $listener
* @return void
* @throws \Exception
* @see LoopInterface::addReadStream()
*/
public static function addReadStream($stream, $listener)
{
self::get()->addReadStream($stream, $listener);
}
/**
* [Advanced] Register a listener to be notified when a stream is ready to write.
*
* @param resource $stream
* @param callable $listener
* @return void
* @throws \Exception
* @see LoopInterface::addWriteStream()
*/
public static function addWriteStream($stream, $listener)
{
self::get()->addWriteStream($stream, $listener);
}
/**
* Remove the read event listener for the given stream.
*
* @param resource $stream
* @return void
* @see LoopInterface::removeReadStream()
*/
public static function removeReadStream($stream)
{
self::get()->removeReadStream($stream);
}
/**
* Remove the write event listener for the given stream.
*
* @param resource $stream
* @return void
* @see LoopInterface::removeWriteStream()
*/
public static function removeWriteStream($stream)
{
self::get()->removeWriteStream($stream);
}
/**
* Enqueue a callback to be invoked once after the given interval.
*
* @param float $interval
* @param callable $callback
* @return TimerInterface
* @see LoopInterface::addTimer()
*/
public static function addTimer($interval, $callback)
{
return self::get()->addTimer($interval, $callback);
}
/**
* Enqueue a callback to be invoked repeatedly after the given interval.
*
* @param float $interval
* @param callable $callback
* @return TimerInterface
* @see LoopInterface::addPeriodicTimer()
*/
public static function addPeriodicTimer($interval, $callback)
{
return self::get()->addPeriodicTimer($interval, $callback);
}
/**
* Cancel a pending timer.
*
* @param TimerInterface $timer
* @return void
* @see LoopInterface::cancelTimer()
*/
public static function cancelTimer(TimerInterface $timer)
{
return self::get()->cancelTimer($timer);
}
/**
* Schedule a callback to be invoked on a future tick of the event loop.
*
* @param callable $listener
* @return void
* @see LoopInterface::futureTick()
*/
public static function futureTick($listener)
{
self::get()->futureTick($listener);
}
/**
* Register a listener to be notified when a signal has been caught by this process.
*
* @param int $signal
* @param callable $listener
* @return void
* @see LoopInterface::addSignal()
*/
public static function addSignal($signal, $listener)
{
self::get()->addSignal($signal, $listener);
}
/**
* Removes a previously added signal listener.
*
* @param int $signal
* @param callable $listener
* @return void
* @see LoopInterface::removeSignal()
*/
public static function removeSignal($signal, $listener)
{
self::get()->removeSignal($signal, $listener);
}
/**
* Run the event loop until there are no more tasks to perform.
*
* @return void
* @see LoopInterface::run()
*/
public static function run()
{
self::get()->run();
}
/**
* Instruct a running event loop to stop.
*
* @return void
* @see LoopInterface::stop()
*/
public static function stop()
{
self::$stopped = \true;
self::get()->stop();
}
}
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