void actor_registry::put(actor_id key, const actor_ptr& value) {
bool add_attachable = false;
if (value != nullptr) {
shared_guard guard(m_instances_mtx);
auto i = m_entries.find(key);
if (i == m_entries.end()) {
auto entry = std::make_pair(key,
value_type(value,
exit_reason::not_exited));
upgrade_guard uguard(guard);
add_attachable = m_entries.insert(entry).second;
}
}
if (add_attachable) {
CPPA_LOG_INFO("added " << key);
struct eraser : attachable {
actor_id m_id;
actor_registry* m_registry;
eraser(actor_id id, actor_registry* s) : m_id(id), m_registry(s) { }
void actor_exited(std::uint32_t reason) {
m_registry->erase(m_id, reason);
}
bool matches(const token&) {
return false;
}
};
value->attach(new eraser(key, this));
}
}
void local_actor::monitor(const actor_ptr& whom) {
if (whom) whom->attach(attachable_ptr{new down_observer(this, whom)});
}
void local_actor::monitor(actor_ptr whom) {
if (whom) whom->attach(new down_observer(this, whom));
}