Future<unit> write_all(Reactor& reactor, StreamPtr out, Buffer data) {
std::shared_ptr<Buffer> datap = std::make_shared<Buffer>(data);
Completer<unit> completer;
auto write_ready = [completer, datap, out]() {
if(datap->size == 0) return;
size_t len = out->write(*datap);
*datap = datap->slice(len);
if(datap->size == 0)
completer.result(unit());
};
out->set_on_write_ready(write_ready);
reactor.schedule(write_ready);
return completer.future();
}
