Ev::embeddableBackends

Returns the set of backends that are embeddable in other event loops

&reftitle.description; final public static `int` `Ev::embeddableBackends`

Returns the set of backends that are embeddable in other event loops.

&reftitle.parameters; &no.function.parameters;
&reftitle.returnvalues;

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

&reftitle.examples;

### 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
    ?>

&reftitle.seealso;

- `EvEmbed`
- `Ev::recommendedBackends`
- `Ev::supportedBackends`
- Backend flags
- Examples