EvWatcher::keepalive

(PECL ev >= 0.2.0)

EvWatcher::keepaliveConfigures whether to keep the loop from returning

说明

public EvWatcher::keepalive ( bool $value = ? ) : bool

Configures whether to keep the loop from returning. With keepalive value set to false the watcher won't keep Ev::run() / EvLoop::run() from returning even though the watcher is active.

Watchers have keepalive value true by default.

Clearing keepalive status is useful when returning from Ev::run() / EvLoop::run() just because of the watcher is undesirable. It could be a long running UDP socket watcher or so.

参数

value

With keepalive value set to false the watcher won't keep Ev::run() / EvLoop::run() from returning even though the watcher is active.

返回值

Returns the previous state.

范例

示例 #1 Register an I/O watcher for some UDP socket but do not keep the event loop from running just because of that watcher.

<?php
$udp_socket 
= ...
$udp_watcher = new EvIo($udp_socketEv::READ, function () { /* ... */ });
$udp_watcher->keepalive(FALSE);
?>