Ev::supportedBackends
(PECL ev >= 0.2.0)
Ev::supportedBackends — Returns the set of backends supported by current libev configuration
Description
final
public
static
Ev::supportedBackends(): int
Returns the set of backends supported by current libev configuration.
Parameters
This function has no parameters.
Return Values
Returns a bit mask which can containing backend flags combined using bitwise OR operator.
Examples
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
?>
See Also
- 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
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