From dc327dd458a69ee0a86faa37f32db257988c0646 Mon Sep 17 00:00:00 2001
From: Aaron Piotrowski <aaron@trowski.com>
Date: Sun, 3 Apr 2022 11:28:42 -0500
Subject: [PATCH] Add Closable interface (#387)

---
 src/Closable.php | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 src/Closable.php

diff --git a/src/Closable.php b/src/Closable.php
new file mode 100644
index 00000000..f8ebe67b
--- /dev/null
+++ b/src/Closable.php
@@ -0,0 +1,26 @@
+<?php
+
+namespace Amp;
+
+interface Closable
+{
+    /**
+     * Closes the resource, marking it as unusable.
+     * Whether pending operations are aborted or not is implementation dependent.
+     */
+    public function close(): void;
+
+    /**
+     * Returns whether this resource has been closed.
+     *
+     * @return bool {@code true} if closed, otherwise {@code false}
+     */
+    public function isClosed(): bool;
+
+    /**
+     * Registers a callback that is invoked when this resource is closed.
+     *
+     * @param \Closure():void $onClose
+     */
+    public function onClose(\Closure $onClose): void;
+}