fclose 500ms delay on a listening socket on Windows

Description

The following code:

<?php
	echo "Stream test\n";
	for ($i = 0; $i < 10; $i++) {
		$s = stream_socket_server("tcp://127.0.0.1:0/", $errno, $errstr);
		$start = microtime(1);
		fclose($s);
		echo sprintf("Closed in %.3f\n", microtime(1) - $start);
	}
	
	echo "Socket test\n";
	for ($i = 0; $i < 10; $i++) {
		$s = socket_create(AF_INET, SOCK_STREAM, 0);
		socket_bind($s, "127.0.0.1", 0);
		socket_listen($s);
		$start = microtime(1);
		socket_close($s);
		echo sprintf("Closed in %.3f\n", microtime(1) - $start);
	}
?>

Resulted in this output:

Stream test
Closed in 0.504
Closed in 0.508
Closed in 0.510
Closed in 0.508
Closed in 0.514
Closed in 0.510
Closed in 0.510
Closed in 0.509
Closed in 0.511
Closed in 0.508
Socket test
Closed in 0.000
Closed in 0.000
Closed in 0.000
Closed in 0.000
Closed in 0.000
Closed in 0.000
Closed in 0.000
Closed in 0.000
Closed in 0.000
Closed in 0.000

But I expected this output instead:

Stream test
Closed in 0.000
Closed in 0.000
Closed in 0.000
Closed in 0.000
Closed in 0.000
Closed in 0.000
Closed in 0.000
Closed in 0.000
Closed in 0.000
Closed in 0.000
Socket test
Closed in 0.000
Closed in 0.000
Closed in 0.000
Closed in 0.000
Closed in 0.000
Closed in 0.000
Closed in 0.000
Closed in 0.000
Closed in 0.000
Closed in 0.000

The problem dates back since at least PHP 5.4.0 as described [here]. I answered there but just tested with the most recent PHP for the Windows platform and confirmed it.

In short - I think that xp_socket.c/php_sockop_close should not poll a listening socket before closing it.

PHP Version

PHP 8.4.12 (cli) (built: Aug 26 2025 18:04:08) (ZTS Visual C++ 2022 x64)
Copyright (c) The PHP Group
Zend Engine v4.4.12, Copyright (c) Zend Technologies

Operating System

Windows 10 Pro x64

从 xp_socket.c 和报告中提到的 php_sockop_close 路径开始，然后跟踪 stream_socket_server() 在 Windows 上关闭监听 socket 的过程。重现 PHP 8.4.12 的 Windows 计时比较，并检查现有的 socket 测试以寻找合适的回归用例。完成的标准是 stream server 在没有报告中的 500ms 延迟的情况下关闭，同时 socket_close() 的行为保持不变。