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);
}
bool monitorable_actor::handle_system_message(mailbox_element& x,
execution_unit* ctx,
bool trap_exit) {
auto& msg = x.content();
if (!trap_exit && msg.size() == 1 && msg.match_element<exit_msg>(0)) {
// exits for non-normal exit reasons
auto& em = msg.get_mutable_as<exit_msg>(0);
if (em.reason)
cleanup(std::move(em.reason), ctx);
return true;
}
if (msg.size() > 1 && msg.match_element<sys_atom>(0)) {
if (!x.sender)
return true;
error err;
mailbox_element_ptr res;
msg.apply(
[&](sys_atom, get_atom, std::string& what) {
CAF_LOG_TRACE(CAF_ARG(what));
if (what != "info") {
err = sec::unsupported_sys_key;
return;
}
res = make_mailbox_element(ctrl(), x.mid.response_id(), {},
ok_atom::value, std::move(what),
strong_actor_ptr{ctrl()}, name());
}
);
if (!res && !err)
err = sec::unsupported_sys_message;
if (err && x.mid.is_request())
res = make_mailbox_element(ctrl(), x.mid.response_id(),
{}, std::move(err));
if (res) {
auto s = actor_cast<strong_actor_ptr>(x.sender);
if (s)
s->enqueue(std::move(res), ctx);
}
return true;
}
return false;
}
typename Inspector::result_type inspect(Inspector& f, mailbox_element& x) {
return f(meta::type_name("mailbox_element"), x.sender, x.mid,
meta::omittable_if_empty(), x.stages, x.content());
}