/**
* @coroutine
*
* Returns a coroutine that is fulfilled when the stream is ready to receive data (output buffer is not full).
*
* @param float|int $timeout Number of seconds until the returned promise is rejected with a TimeoutException
* if the data cannot be written to the stream. Use null for no timeout.
*
* @return \Generator
*
* @resolve int Always resolves with 0.
*
* @throws \Icicle\Stream\Exception\UnwritableException If the stream is no longer writable.
* @throws \Icicle\Stream\Exception\ClosedException If the stream has been closed.
*/
public function await(float $timeout = 0) : \Generator
{
return $this->writable->await($timeout);
}
