envoy_mobile_v0.2_post_callback.cc

static void ios_on_headers(envoy_headers headers, bool end_stream, void *context) {
  // reconstituted callback.
  ios_context *c = (ios_context *)context;
  EnvoyHTTPCallbacks *callbacks = c->callbacks;
  
  // dispatching to user-provided dispatch queue.
  dispatch_async(callbacks.dispatchQueue, ^{
    if (!dispatchable(c->closed, end_stream) || !callbacks.onHeaders) {
      return;
    }
    // calling user-provided block.
    callbacks.onHeaders(to_ios_headers(headers), end_stream);
  });
}