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- <?php
- namespace React\EventLoop;
- use Ev;
- use EvIo;
- use EvLoop;
- use React\EventLoop\Tick\FutureTickQueue;
- use React\EventLoop\Timer\Timer;
- use SplObjectStorage;
- /**
- * An `ext-ev` based event loop.
- *
- * This loop uses the [`ev` PECL extension](https://pecl.php.net/package/ev),
- * that provides an interface to `libev` library.
- * `libev` itself supports a number of system-specific backends (epoll, kqueue).
- *
- * This loop is known to work with PHP 5.4 through PHP 8+.
- *
- * @see http://php.net/manual/en/book.ev.php
- * @see https://bitbucket.org/osmanov/pecl-ev/overview
- */
- class ExtEvLoop implements LoopInterface
- {
- /**
- * @var EvLoop
- */
- private $loop;
- /**
- * @var FutureTickQueue
- */
- private $futureTickQueue;
- /**
- * @var SplObjectStorage
- */
- private $timers;
- /**
- * @var EvIo[]
- */
- private $readStreams = array();
- /**
- * @var EvIo[]
- */
- private $writeStreams = array();
- /**
- * @var bool
- */
- private $running;
- /**
- * @var SignalsHandler
- */
- private $signals;
- /**
- * @var \EvSignal[]
- */
- private $signalEvents = array();
- public function __construct()
- {
- $this->loop = new EvLoop();
- $this->futureTickQueue = new FutureTickQueue();
- $this->timers = new SplObjectStorage();
- $this->signals = new SignalsHandler();
- }
- public function addReadStream($stream, $listener)
- {
- $key = (int)$stream;
- if (isset($this->readStreams[$key])) {
- return;
- }
- $callback = $this->getStreamListenerClosure($stream, $listener);
- $event = $this->loop->io($stream, Ev::READ, $callback);
- $this->readStreams[$key] = $event;
- }
- /**
- * @param resource $stream
- * @param callable $listener
- *
- * @return \Closure
- */
- private function getStreamListenerClosure($stream, $listener)
- {
- return function () use ($stream, $listener) {
- \call_user_func($listener, $stream);
- };
- }
- public function addWriteStream($stream, $listener)
- {
- $key = (int)$stream;
- if (isset($this->writeStreams[$key])) {
- return;
- }
- $callback = $this->getStreamListenerClosure($stream, $listener);
- $event = $this->loop->io($stream, Ev::WRITE, $callback);
- $this->writeStreams[$key] = $event;
- }
- public function removeReadStream($stream)
- {
- $key = (int)$stream;
- if (!isset($this->readStreams[$key])) {
- return;
- }
- $this->readStreams[$key]->stop();
- unset($this->readStreams[$key]);
- }
- public function removeWriteStream($stream)
- {
- $key = (int)$stream;
- if (!isset($this->writeStreams[$key])) {
- return;
- }
- $this->writeStreams[$key]->stop();
- unset($this->writeStreams[$key]);
- }
- public function addTimer($interval, $callback)
- {
- $timer = new Timer($interval, $callback, false);
- $that = $this;
- $timers = $this->timers;
- $callback = function () use ($timer, $timers, $that) {
- \call_user_func($timer->getCallback(), $timer);
- if ($timers->contains($timer)) {
- $that->cancelTimer($timer);
- }
- };
- $event = $this->loop->timer($timer->getInterval(), 0.0, $callback);
- $this->timers->attach($timer, $event);
- return $timer;
- }
- public function addPeriodicTimer($interval, $callback)
- {
- $timer = new Timer($interval, $callback, true);
- $callback = function () use ($timer) {
- \call_user_func($timer->getCallback(), $timer);
- };
- $event = $this->loop->timer($timer->getInterval(), $timer->getInterval(), $callback);
- $this->timers->attach($timer, $event);
- return $timer;
- }
- public function cancelTimer(TimerInterface $timer)
- {
- if (!isset($this->timers[$timer])) {
- return;
- }
- $event = $this->timers[$timer];
- $event->stop();
- $this->timers->detach($timer);
- }
- public function futureTick($listener)
- {
- $this->futureTickQueue->add($listener);
- }
- public function run()
- {
- $this->running = true;
- while ($this->running) {
- $this->futureTickQueue->tick();
- $hasPendingCallbacks = !$this->futureTickQueue->isEmpty();
- $wasJustStopped = !$this->running;
- $nothingLeftToDo = !$this->readStreams
- && !$this->writeStreams
- && !$this->timers->count()
- && $this->signals->isEmpty();
- $flags = Ev::RUN_ONCE;
- if ($wasJustStopped || $hasPendingCallbacks) {
- $flags |= Ev::RUN_NOWAIT;
- } elseif ($nothingLeftToDo) {
- break;
- }
- $this->loop->run($flags);
- }
- }
- public function stop()
- {
- $this->running = false;
- }
- public function __destruct()
- {
- /** @var TimerInterface $timer */
- foreach ($this->timers as $timer) {
- $this->cancelTimer($timer);
- }
- foreach ($this->readStreams as $key => $stream) {
- $this->removeReadStream($key);
- }
- foreach ($this->writeStreams as $key => $stream) {
- $this->removeWriteStream($key);
- }
- }
- public function addSignal($signal, $listener)
- {
- $this->signals->add($signal, $listener);
- if (!isset($this->signalEvents[$signal])) {
- $this->signalEvents[$signal] = $this->loop->signal($signal, function() use ($signal) {
- $this->signals->call($signal);
- });
- }
- }
- public function removeSignal($signal, $listener)
- {
- $this->signals->remove($signal, $listener);
- if (isset($this->signalEvents[$signal])) {
- $this->signalEvents[$signal]->stop();
- unset($this->signalEvents[$signal]);
- }
- }
- }
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