Actually stable version.

src/Runtime.php

@@ -0,0 +1,55 @@
+<?php
+
+
+namespace JoopSchilder\Asynchronous;
+
+/**
+ * Class Runtime
+ * @package JoopSchilder\Asynchronous
+ *
+ * Created to keep track of the current runtime situation.
+ * This is critical in order for the application to know
+ * which destructors and handlers to call.
+ */
+class Runtime
+{
+	/** @var bool */
+	private static $inParentRuntime = true;
+
+
+	/**
+	 *
+	 */
+	public static function setChild()
+	{
+		self::$inParentRuntime = false;
+	}
+
+
+	/**
+	 *
+	 */
+	public static function setParent()
+	{
+		self::$inParentRuntime = true;
+	}
+
+
+	/**
+	 * @return bool
+	 */
+	public static function isParent()
+	{
+		return self::$inParentRuntime;
+	}
+
+
+	/**
+	 * @return bool
+	 */
+	public static function isChild()
+	{
+		return !self::$inParentRuntime;
+	}
+
+}