Initial Commit

dependencies/amphp/amp/lib/Loop/DriverFactory.php

@@ -0,0 +1,55 @@
+<?php
+
+namespace WP_Ultimo\Dependencies\Amp\Loop;
+
+// @codeCoverageIgnoreStart
+class DriverFactory
+{
+    /**
+     * Creates a new loop instance and chooses the best available driver.
+     *
+     * @return Driver
+     *
+     * @throws \Error If an invalid class has been specified via AMP_LOOP_DRIVER
+     */
+    public function create() : Driver
+    {
+        $driver = (function () {
+            if ($driver = $this->createDriverFromEnv()) {
+                return $driver;
+            }
+            if (UvDriver::isSupported()) {
+                return new UvDriver();
+            }
+            if (EvDriver::isSupported()) {
+                return new EvDriver();
+            }
+            if (EventDriver::isSupported()) {
+                return new EventDriver();
+            }
+            return new NativeDriver();
+        })();
+        if (\getenv("AMP_DEBUG_TRACE_WATCHERS")) {
+            return new TracingDriver($driver);
+        }
+        return $driver;
+    }
+    /**
+     * @return Driver|null
+     */
+    private function createDriverFromEnv()
+    {
+        $driver = \getenv("AMP_LOOP_DRIVER");
+        if (!$driver) {
+            return null;
+        }
+        if (!\class_exists($driver)) {
+            throw new \Error(\sprintf("Driver '%s' does not exist.", $driver));
+        }
+        if (!\is_subclass_of($driver, Driver::class)) {
+            throw new \Error(\sprintf("Driver '%s' is not a subclass of '%s'.", $driver, Driver::class));
+        }
+        return new $driver();
+    }
+}
+// @codeCoverageIgnoreEnd