Add loop driver for pecl libev extension.

The existing libev driver seems to function only with a non-official, out of date libev extension for PHP. This PeclEvLoop class is a very similar clone of the LibEvLoop library but for the officially documented libev extension. Changes are mostly to constants and function parameter order.
reactphp · ivkalita · Mar 21, 2015 · Mar 21, 2015 · Apr 8, 2017 · Apr 8, 2017
commit 4455a3be9426beb1bb0519cfa7c6529cbccc8ffd
diff --git a/src/Factory.php b/src/Factory.php
@@ -11,6 +11,8 @@ public static function create()
             return new LibEventLoop();
         } elseif (class_exists('libev\EventLoop', false)) {
             return new LibEvLoop;
+        } elseif (class_exists('EvLoop', false)) {
+            return new PeclEvLoop;
         } elseif (class_exists('EventBase', false)) {
             return new ExtEventLoop;
         }

diff --git a/src/PeclEvLoop.php b/src/PeclEvLoop.php
@@ -0,0 +1,217 @@
+<?php
+
+namespace React\EventLoop;
+
+use Ev;
+use EvLoop;
+use EvIo;
+use EvTimer;
+use EvPeriodic;
+use React\EventLoop\Tick\FutureTickQueue;
+use React\EventLoop\Tick\NextTickQueue;
+use React\EventLoop\Timer\Timer;
+use React\EventLoop\Timer\TimerInterface;
+use SplObjectStorage;
+
+/**
+ * @see https://bitbucket.org/osmanov/pecl-ev/overview
+ */
+class PeclEvLoop implements LoopInterface
+{
+    private $loop;
+    private $nextTickQueue;
+    private $futureTickQueue;
+    private $timerEvents;
+    private $readEvents = [];
+    private $writeEvents = [];
+    private $running;
+
+    public function __construct()
+    {
+        $this->loop             = EvLoop::defaultLoop();
+        $this->nextTickQueue    = new NextTickQueue($this);
+        $this->futureTickQueue  = new FutureTickQueue($this);
+        $this->timerEvents      = new SplObjectStorage();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function addReadStream($stream, callable $listener)
+    {
+        $callback = function () use ($stream, $listener) {
+            call_user_func($listener, $stream, $this);
+        };
+
+        $event = $this->loop->io($stream, Ev::READ, $callback);
+
+        $this->readEvents[(int) $stream] = $event;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function addWriteStream($stream, callable $listener)
+    {
+        $callback = function () use ($stream, $listener) {
+            call_user_func($listener, $stream, $this);
+        };
+
+        $event = $this->loop->io($stream, Ev::WRITE, $callback);
+
+        $this->writeEvents[(int) $stream] = $event;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function removeReadStream($stream)
+    {
+        $key = (int) $stream;
+
+        if (isset($this->readEvents[$key])) {
+            $this->readEvents[$key]->stop();
+            unset($this->readEvents[$key]);
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function removeWriteStream($stream)
+    {
+        $key = (int) $stream;
+
+        if (isset($this->writeEvents[$key])) {
+            $this->writeEvents[$key]->stop();
+            unset($this->writeEvents[$key]);
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function removeStream($stream)
+    {
+        $this->removeReadStream($stream);
+        $this->removeWriteStream($stream);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function addTimer($interval, callable $callback)
+    {
+        $timer = new Timer($this, $interval, $callback, false);
+
+        $callback = function () use ($timer) {
+            call_user_func($timer->getCallback(), $timer);
+
+            if ($this->isTimerActive($timer)) {
+                $this->cancelTimer($timer);
+            }
+        };
+
+        $event = $this->loop->timer($timer->getInterval(), 0.0, $callback);
+        $this->timerEvents->attach($timer, $event);
+
+        return $timer;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function addPeriodicTimer($interval, callable $callback)
+    {
+        $timer = new Timer($this, $interval, $callback, true);
+
+        $callback = function () use ($timer) {
+            call_user_func($timer->getCallback(), $timer);
+        };
+
+        //reschedule callback should be NULL to utilize $offset and $interval params
+        $event = $this->loop->periodic($interval, $interval, NULL, $callback);
+        $this->timerEvents->attach($timer, $event);
+
+        return $timer;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function cancelTimer(TimerInterface $timer)
+    {
+        if (isset($this->timerEvents[$timer])) {
+            $event = $this->timerEvents->get($timer);
+            $event->stop();
+            $this->timerEvents->detach($timer);
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function isTimerActive(TimerInterface $timer)
+    {
+        return $this->timerEvents->contains($timer);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function nextTick(callable $listener)
+    {
+        $this->nextTickQueue->add($listener);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function futureTick(callable $listener)
+    {
+        $this->futureTickQueue->add($listener);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function tick()
+    {
+        $this->nextTickQueue->tick();
+
+        $this->futureTickQueue->tick();
+
+        $this->loop->run(Ev::RUN_ONCE | Ev::RUN_NOWAIT);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function run()
+    {
+        $this->running = true;
+
+        while ($this->running) {
+            $this->nextTickQueue->tick();
+
+            $this->futureTickQueue->tick();
+
+            $flags = Ev::RUN_ONCE;
+            if (!$this->running || !$this->nextTickQueue->isEmpty() || !$this->futureTickQueue->isEmpty()) {
+                $flags |= Ev::RUN_NOWAIT;
+            } elseif (!$this->readEvents && !$this->writeEvents && !$this->timerEvents->count()) {
+                break;
+            }
+
+            $this->loop->run($flags);
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function stop()
+    {
+        $this->running = false;
+    }
+}