Initial Commit

dependencies/amphp/sync/src/PrefixedKeyedSemaphore.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace WP_Ultimo\Dependencies\Amp\Sync;
+
+use WP_Ultimo\Dependencies\Amp\Promise;
+final class PrefixedKeyedSemaphore implements KeyedSemaphore
+{
+    /** @var KeyedSemaphore */
+    private $semaphore;
+    /** @var string */
+    private $prefix;
+    public function __construct(KeyedSemaphore $semaphore, string $prefix)
+    {
+        $this->semaphore = $semaphore;
+        $this->prefix = $prefix;
+    }
+    public function acquire(string $key) : Promise
+    {
+        return $this->semaphore->acquire($this->prefix . $key);
+    }
+}