Initial Commit

dependencies/amphp/amp/lib/Delayed.php

@@ -0,0 +1,52 @@
+<?php
+
+namespace WP_Ultimo\Dependencies\Amp;
+
+/**
+ * Creates a promise that resolves itself with a given value after a number of milliseconds.
+ *
+ * @template-covariant TReturn
+ * @template-implements Promise<TReturn>
+ */
+final class Delayed implements Promise
+{
+    use Internal\Placeholder;
+    /** @var string|null Event loop watcher identifier. */
+    private $watcher;
+    /**
+     * @param int     $time Milliseconds before succeeding the promise.
+     * @param TReturn $value Succeed the promise with this value.
+     */
+    public function __construct(int $time, $value = null)
+    {
+        $this->watcher = Loop::delay($time, function () use($value) {
+            $this->watcher = null;
+            $this->resolve($value);
+        });
+    }
+    /**
+     * References the internal watcher in the event loop, keeping the loop running while this promise is pending.
+     *
+     * @return self
+     */
+    public function reference() : self
+    {
+        if ($this->watcher !== null) {
+            Loop::reference($this->watcher);
+        }
+        return $this;
+    }
+    /**
+     * Unreferences the internal watcher in the event loop, allowing the loop to stop while this promise is pending if
+     * no other events are pending in the loop.
+     *
+     * @return self
+     */
+    public function unreference() : self
+    {
+        if ($this->watcher !== null) {
+            Loop::unreference($this->watcher);
+        }
+        return $this;
+    }
+}