(PECL eio >= 0.0.1dev)
eio_cancel — Cancels a request
$req
)
eio_cancel() cancels a request specified by
req
req
The request resource
pri
The request priority: EIO_PRI_DEFAULT, EIO_PRI_MIN, EIO_PRI_MAX, or NULL.
If NULL passed, pri internally is set to
EIO_PRI_DEFAULT.
callback
callback function is called when the request is done.
It should match the following prototype:
void callback($data, $result);
$data is custom
data passed to the request.
$result contains
request-specific result value; basically, the value returned by corresponding
system call.
data
Arbitrary variable passed to callback.
Es wird kein Wert zurückgegeben.
Beispiel #1 eio_cancel() example
<?php
/* Is called when eio_nop() finished */
function my_nop_cb($data, $result) {
echo "my_nop ", $data, "\n";
}
// This eio_nop() call will be cancelled
$req = eio_nop(EIO_PRI_DEFAULT, "my_nop_cb", "1");
var_dump($req);
eio_cancel($req);
// This time eio_nop() will be processed
eio_nop(EIO_PRI_DEFAULT, "my_nop_cb", "2");
// Process requests
eio_event_loop();
?>
Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:
resource(4) of type (EIO Request Descriptor) my_nop 2