add ability for child to send message to parent before child exit

Lindsay Snider · Lindsay Snider · commit a40020c501ad · 2016-12-08T17:06:01.000Z
diff --git a/fork_daemon.php b/fork_daemon.php
@@ -185,6 +185,13 @@ class fork_daemon
 	 */
 	protected $exit_request_status = false;
 
+	/**
+	 * In the child process, stores the socket to get results back to the parent
+	 *
+	 * @var null
+	 */
+	protected $child_socket_to_parent = null;
+
 	/**************** SERVER CONTROLS ****************/
 	/**
 	 * Upper limit on the number of children started.
@@ -1506,12 +1513,21 @@ public function has_result($bucket = self::DEFAULT_BUCKET)
 	/**
 	 * Run signals sent to the process
 	 */
-	static public function dispatch_signals()
+	public static function dispatch_signals()
 	{
 		// Run signal handlers
 		pcntl_signal_dispatch();
 	}
 
+	/**
+	 * Send a message from the child to the parent
+	 * @param $result
+	 */
+	public function child_send_result_to_parent($result)
+	{
+		self::socket_send($this->child_socket_to_parent, $result);
+	}
+
 	/**
 	 * Checks if any changed child sockets are in the bucket.
 	 *
@@ -1764,6 +1780,9 @@ protected function fork_work_unit($work_unit, $identifier = '', $bucket = self::
 			$this->forked_children = null;
 			$this->results = null;
 
+			// save the socket from child to parent to support $this->child_send_result_to_parent()
+			$this->child_socket_to_parent = $socket_parent;
+
 			// set child properties
 			$this->child_bucket = $bucket;
 
