array ( 0 => 'index.php', 1 => 'PHP Manual', ), 'head' => array ( 0 => 'UTF-8', 1 => 'zh', ), 'this' => array ( 0 => 'function.eio-cancel.php', 1 => 'eio_cancel', ), 'up' => array ( 0 => 'ref.eio.php', 1 => 'Eio 函数', ), 'prev' => array ( 0 => 'function.eio-busy.php', 1 => 'eio_busy', ), 'next' => array ( 0 => 'function.eio-chmod.php', 1 => 'eio_chmod', ), 'alternatives' => array ( ), 'source' => array ( 'lang' => 'en', 'path' => 'reference/eio/functions/eio-cancel.xml', ), ); $setup["toc"] = $TOC; $setup["toc_deprecated"] = $TOC_DEPRECATED; $setup["parents"] = $PARENTS; manual_setup($setup); ?>
(PECL eio >= 0.0.1dev)
eio_cancel — Cancels a request
req
The request resource
pri
请求的优先级:EIO_PRI_DEFAULT
,EIO_PRI_MIN
,EIO_PRI_MAX
或 null
。如果是
null
,pri
将设为
EIO_PRI_DEFAULT
。
callback
callback
函数在请求完成时被调用。其应匹配一下原型:
void callback(mixed $data, int $result[, resource $req]);
data
传递给请求的用户数据。
result
针对请求的结果的值。通常是相应的系统调用返回的值。
req
可选的请求资源,可被 eio_get_last_error() 之类的函数使用。
data
Arbitrary variable passed to callback
.
没有返回值。
示例 #1 eio_cancel() example
<?php
/* Is called when eio_nop() finished */
function my_nop_cb($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();
?>
以上示例的输出类似于:
resource(4) of type (EIO Request Descriptor) my_nop 2