eio_grp_add
(PECL eio >= 0.0.1dev)
eio_grp_add — Adds a request to the request group
Description
eio_grp_add(resource
$grp, resource $req): voideio_grp_add() adds a request to the request group.
Parameters
-
grp -
The request group resource returned by eio_grp()
-
req -
The request resource
Return Values
No value is returned.
Examples
Example #1 Grouping requests
<?php
/*
* Create a group request to open, read and close a file
*/
// Create temporary file and write some bytes to it
$temp_filename = dirname(__FILE__) ."/eio-file.tmp";
$fp = fopen($temp_filename, "w");
fwrite($fp, "some data");
fclose($fp);
/* Is called when the group requests are done */
function my_grp_done($data, $result) {
var_dump($result == 0);
@unlink($data);
}
/* Is called when eio_open() done */
function my_grp_file_opened_callback($data, $result) {
global $grp;
// $result should contain the file descriptor
var_dump($result > 0);
// Create eio_read() request and add it to the group
// Pass file descriptor to the callback
$req = eio_read($result, 4, 0,
EIO_PRI_DEFAULT, "my_grp_file_read_callback", $result);
eio_grp_add($grp, $req);
}
/* Is called when eio_read() done */
function my_grp_file_read_callback($data, $result) {
global $grp;
// Read bytes
var_dump($result);
// Create eio_close() request and add it to the group
// $data should contain the file descriptor
$req = eio_close($data);
eio_grp_add($grp, $req);
}
// Create request group
$grp = eio_grp("my_grp_done", $temp_filename);
var_dump($grp);
// Create eio_open() request and add it to the group
$req = eio_open($temp_filename, EIO_O_RDWR | EIO_O_APPEND , NULL,
EIO_PRI_DEFAULT, "my_grp_file_opened_callback", NULL);
eio_grp_add($grp, $req);
// Process requests
eio_event_loop();
?>
The above example will output something similar to:
resource(6) of type (EIO Group Descriptor) bool(true) string(4) "some" bool(true)
See Also
- eio_grp() - Creates a request group
- eio_grp_cancel() - Cancels a request group
- eio_grp_limit() - Set group limit
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