Ev::recommendedBackends
PHP function
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(PECL ev >= 0.2.0)
Returns a bit mask of recommended backends for current platform
Description
Ev::recommendedBackends(): int
Returns the set of all backends compiled into this binary of libev and also recommended for this platform, meaning it will work for most file descriptor types. This set is often smaller than the one returned by ev_supported_backends(), as for example kqueue is broken on most BSD systems and will not be auto-detected unless it is requested explicitly. This is the set of backends that libev will probe when no backends are specified explicitly.
Parameters Parameters
Return Values
Returns a bit mask which can containing backend flags combined using bitwise OR operator.
Examples
Embedding one loop into another
php
<?php
/*
* Try to get an embeddable event loop and embed it into the default event loop.
* If it is impossible, use the default
* loop. The default loop is stored in $loop_hi, while the embeddable loop is
* stored in $loop_lo(which is $loop_hi in the case no embeddable loop can be
* used).
*
* Sample translated to PHP
* http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod#Examples_CONTENT-9
*/
$loop_hi = EvLoop::defaultLoop();
$loop_lo = NULL;
$embed = NULL;
/*
* See if there is a chance of getting one that works
* (flags' value of 0 means autodetection)
*/
$loop_lo = Ev::embeddableBackends() & Ev::recommendedBackends()
? new EvLoop(Ev::embeddableBackends() & Ev::recommendedBackends())
: 0;
if ($loop_lo) {
$embed = new EvEmbed($loop_lo, function () {});
} else {
$loop_lo = $loop_hi;
}
?>See Also
EvEmbedEv::embeddableBackendsEv::supportedBackends- Backend flags
- Examples