Exemplo n.º 1
0
void sequencer::enqueue(mailbox_element_ptr what, execution_unit* context) {
  auto down_msg_handler = [&](down_msg& dm) {
    // quit if either `f` or `g` are no longer available
    cleanup(std::move(dm.reason), context);
  };
  if (handle_system_message(*what, context, false, down_msg_handler))
    return;
  strong_actor_ptr f;
  strong_actor_ptr g;
  error err;
  shared_critical_section([&] {
    f = f_;
    g = g_;
    err = fail_state_;
  });
  if (!f) {
    // f and g are invalid only after the sequencer terminated
    bounce(what, err);
    return;
  }
  // process and forward the non-system message;
  // store `f` as the next stage in the forwarding chain
  what->stages.push_back(std::move(f));
  // forward modified message to `g`
  g->enqueue(std::move(what), context);
}
Exemplo n.º 2
0
 bool handle_system_message(mailbox_element& x, execution_unit* context,
                            bool trap_exit, F& down_msg_handler) {
   auto& content = x.content();
   if (content.type_token() == make_type_token<down_msg>()) {
     if (content.shared()) {
       auto vptr = content.copy(0);
       down_msg_handler(vptr->get_mutable_as<down_msg>());
     } else {
       down_msg_handler(content.get_mutable_as<down_msg>(0));
     }
     return true;
   }
   return handle_system_message(x, context, trap_exit);
 }