(PECL pthreads >= 2.0.0)
Threaded::wait — Synchronization
timeout可选参数，等待时间，以微秒计
示例 #1 等待和唤醒
<?php
class My extends Thread {
public function run() {
/** 让本线程进入等待状态 **/
$this->synchronized(function($thread){
if (!$thread->done)
$thread->wait();
}, $this);
}
}
$my = new My();
$my->start();
/** 向处于等待状态的线程发送唤醒通知 **/
$my->synchronized(function($thread){
$thread->done = true;
$thread->notify();
}, $my);
var_dump($my->join());
?>以上示例会输出：
bool(true)