Ev::supportedBackends

(PECL ev >= 0.2.0)

Ev::supportedBackendsReturns the set of backends supported by current libev configuration

说明

final public static Ev::supportedBackends ( void ) : int

Returns the set of backends supported by current libev configuration.

参数

此函数没有参数。

返回值

Returns a bit mask which can containing backend flags combined using bitwise OR operator.

范例

Example #1 Embedding loop created with kqueue backend into the default loop

<?php
/*
* Check if kqueue is available but not recommended and create a kqueue backend
* for use with sockets (which usually work with any kqueue implementation).
* Store the kqueue/socket-only event loop in loop_socket. (One might optionally
* use EVFLAG_NOENV, too)
*
* Example borrowed from
* http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod#Examples_CONTENT-9
*/
$loop        EvLoop::defaultLoop();
$socket_loop NULL;
$embed       NULL;

if (
Ev::supportedBackends() & ~Ev::recommendedBackends() & Ev::BACKEND_KQUEUE) {
 if ((
$socket_loop = new EvLoop(Ev::BACKEND_KQUEUE))) {
  
$embed = new EvEmbed($loop);
 }
}

if (!
$socket_loop) {
 
$socket_loop $loop;
}

// Now use $socket_loop for all sockets, and $loop for anything else
?>

参见