EvWatcher::keepalive

(PECL ev >= 0.2.0)

EvWatcher::keepalive — Configures whether to keep the loop from returning

说明

public bool EvWatcher::keepalive ([ bool $value ] )

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

Example #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_socket ,  Ev :: READ , function () {    });
 $udp_watcher -> keepalive ( FALSE );
 ?>