(PECL eio >= 0.0.1dev)
eio_cancel — Cancels a request
$req
)
eio_cancel() cancels a request specified by
req
req
The request resource
pri
请求的优先级: EIO_PRI_DEFAULT
, EIO_PRI_MIN
, EIO_PRI_MAX
, or NULL
.
如果是 NULL
, pri
将设为
EIO_PRI_DEFAULT
.
callback
callback
函数将在请求结束时被调用.
必须符合此原型:
void callback($data, $result);
$data
是传给该请求的特定数据.
$result
包含特定请求的结果值, 通常是相应的系统调用的返回值.
data
Arbitrary variable passed to callback
.
没有返回值。
Example #1 eio_cancel() example
<?php
/* Is called when eio_nop() finished */
function my_nop_cb($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();
?>
以上例程的输出类似于:
resource(4) of type (EIO Request Descriptor) my_nop 2