Method sendfile

src/windows/poll_socket.cpp:194–204

Future<size_t> PollSocketImpl::sendfile(int_fd fd, off_t offset, size_t size)
{
  CHECK(size > 0); // TODO(benh): Just return 0 if `size` is 0?

  // Need to hold a copy of `this` so that the underlying socket
  // doesn't end up getting reused before we return.
  auto self = shared(this);

  return windows::sendfile(self->get(), fd, offset, size)
    .then([self](size_t length) { return length; });
}

} // namespace internal {
} // namespace network {