| public static randomBytes ( integer $len, callable $cb, integer $pri, boolean $hang = false ) : integer | ||
| $len | integer | Length of desired string |
| $cb | callable | Callback |
| $pri | integer | Priority of EIO operation |
| $hang | boolean | If true, we shall use /dev/random instead of /dev/urandom and it may cause a delay |
| return | integer | |
public static function randomBytes($len, $cb, $pri = 0, $hang = false)
{
$cb = CallbackWrapper::wrap($cb);
FileSystem::open('/dev/' . ($hang ? '' : 'u') . 'random', 'r', function ($file) use($len, $cb, $pri) {
if (!$file) {
$cb(false);
return;
}
$file->read($len, 0, function ($file, $data) use($cb) {
$cb($data);
}, $pri);
}, null, $pri);
}