/**
* {@inheritdoc}
*/
public function wait()
{
while (null === $this->result) {
if (Loop\isEmpty()) {
throw new UnresolvedError('Loop emptied without resolving the awaitable.');
}
Loop\tick(true);
}
return $this->unwrap()->wait();
}
/**
* This function may be used to synchronously wait for a promise to be resolved. This function should generally
* not be used within a running event loop, but rather to set up a task (or set of tasks, then use join() or another
* function to group them) and synchronously wait for the task to complete. Using this function in a running event
* loop will not block the loop, but it will prevent control from moving past the call to this function and disrupt
* program flow.
*
* @param PromiseInterface $promise
*
* @return mixed Promise fulfillment value.
*
* @throws \Icicle\Promise\Exception\UnresolvedError If the event loop empties without fulfilling the promise.
* @throws \Throwable If the promise is rejected, the rejection reason is thrown from this function.
*/
function wait(PromiseInterface $promise)
{
while ($promise->isPending()) {
if (Loop\isEmpty()) {
throw new UnresolvedError('Loop emptied without resolving promise.');
}
Loop\tick(true);
}
$result = $promise->getResult();
if ($promise->isRejected()) {
throw $result;
}
return $result;
}