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PHP

Cancels a request


eio_cancel

(PECL eio >= 0.0.1dev)

eio_cancelCancels a request

Description

void eio_cancel ( resource $req )

eio_cancel() cancels a request specified by req

Parameters

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(mixed $data, int $result[, resource $req]);
data

is custom data passed to the request.

result

request-specific result value; basically, the value returned by corresponding system call.

req

is optional request resource which can be used with functions like eio_get_last_error()

data

Arbitrary variable passed to callback.

Return Values

No value is returned.

Examples

Example #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();
?>

The above example will output something similar to:

 resource(4) of type (EIO Request Descriptor) my_nop 2 

See Also

  • eio_grp_cancel


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