/**
* check socket to see if a write/send/sendTo will not block
*
* @param float|NULL $sec maximum time to wait (in seconds), 0 = immediate polling, null = no limit
* @return boolean true = socket ready (write will not block), false = timeout expired, socket is not ready
* @throws Exception on error
* @uses socket_select()
*/
public function selectWrite($sec = 0)
{
$usec = $sec === null ? null : ($sec - floor($sec)) * 1000000;
$w = array($this->resource);
$ret = @socket_select($x, $w, $x, $sec, $usec);
if ($ret === false) {
throw Exception::createFromGlobalSocketOperation('Failed to select socket for writing');
}
return !!$ret;
}
