Php/docs/ev.supportedbackends

• PHP Manual
• Ev
• Returns the set of backends supported by current libev configuration

Ev::supportedBackends

(PECL ev >= 0.2.0)

Ev::supportedBackends — Returns the set of backends supported by current libev configuration

说明

final public static Ev::supportedBackends ( ) : 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

• EvEmbed
• Ev::recommendedBackends() - Returns a bit mask of recommended backends for current platform
• Ev::embeddableBackends() - Returns the set of backends that are embeddable in other event loops
• Backend flags
• Examples