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224 lines (191 loc) · 8.8 KB
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/******************************************************************************\
* ___ __ *
* /\_ \ __/\ \ *
* \//\ \ /\_\ \ \____ ___ _____ _____ __ *
* \ \ \ \/\ \ \ '__`\ /'___\/\ '__`\/\ '__`\ /'__`\ *
* \_\ \_\ \ \ \ \L\ \/\ \__/\ \ \L\ \ \ \L\ \/\ \L\.\_ *
* /\____\\ \_\ \_,__/\ \____\\ \ ,__/\ \ ,__/\ \__/.\_\ *
* \/____/ \/_/\/___/ \/____/ \ \ \/ \ \ \/ \/__/\/_/ *
* \ \_\ \ \_\ *
* \/_/ \/_/ *
* *
* Copyright (C) 2011-2013 *
* Dominik Charousset <dominik.charousset@haw-hamburg.de> *
* *
* This file is part of libcppa. *
* libcppa is free software: you can redistribute it and/or modify it under *
* the terms of the GNU Lesser General Public License as published by the *
* Free Software Foundation; either version 2.1 of the License, *
* or (at your option) any later version. *
* *
* libcppa is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. *
* See the GNU Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public License *
* along with libcppa. If not, see <http://www.gnu.org/licenses/>. *
\******************************************************************************/
#include <string>
#include "cppa/cppa.hpp"
#include "cppa/atom.hpp"
#include "cppa/logging.hpp"
#include "cppa/scheduler.hpp"
#include "cppa/local_actor.hpp"
#include "cppa/detail/raw_access.hpp"
namespace cppa {
namespace {
class down_observer : public attachable {
actor_addr m_observer;
actor_addr m_observed;
public:
down_observer(actor_addr observer, actor_addr observed)
: m_observer(std::move(observer)), m_observed(std::move(observed)) {
CPPA_REQUIRE(m_observer != nullptr);
CPPA_REQUIRE(m_observed != nullptr);
}
void actor_exited(std::uint32_t reason) {
auto ptr = detail::raw_access::get(m_observer);
message_header hdr{m_observed, ptr, message_id{}.with_high_priority()};
hdr.deliver(make_any_tuple(down_msg{m_observed, reason}));
}
bool matches(const attachable::token& match_token) {
if (match_token.subtype == typeid(down_observer)) {
auto ptr = reinterpret_cast<const local_actor*>(match_token.ptr);
return m_observer == ptr->address();
}
return false;
}
};
} // namespace <anonymous>
local_actor::local_actor()
: m_trap_exit(false)
, m_dummy_node(), m_current_node(&m_dummy_node)
, m_planned_exit_reason(exit_reason::not_exited)
, m_state(actor_state::ready) {
m_node = get_middleman()->node();
}
local_actor::~local_actor() { }
void local_actor::monitor(const actor_addr& whom) {
if (!whom) return;
auto ptr = detail::raw_access::get(whom);
ptr->attach(attachable_ptr{new down_observer(address(), whom)});
}
void local_actor::demonitor(const actor_addr& whom) {
if (!whom) return;
auto ptr = detail::raw_access::get(whom);
attachable::token mtoken{typeid(down_observer), this};
ptr->detach(mtoken);
}
void local_actor::on_exit() { }
void local_actor::join(const group& what) {
CPPA_LOG_TRACE(CPPA_TSARG(what));
if (what && m_subscriptions.count(what) == 0) {
CPPA_LOG_DEBUG("join group: " << to_string(what));
m_subscriptions.insert(std::make_pair(what, what->subscribe(this)));
}
}
void local_actor::leave(const group& what) {
if (what) m_subscriptions.erase(what);
}
std::vector<group> local_actor::joined_groups() const {
std::vector<group> result;
for (auto& kvp : m_subscriptions) {
result.emplace_back(kvp.first);
}
return result;
}
void local_actor::reply_message(any_tuple&& what) {
auto& whom = m_current_node->sender;
if (!whom) return;
auto& id = m_current_node->mid;
if (id.valid() == false || id.is_response()) {
send_tuple(detail::raw_access::get(whom), std::move(what));
}
else if (!id.is_answered()) {
auto ptr = detail::raw_access::get(whom);
ptr->enqueue({address(), ptr, id.response_id()}, std::move(what));
id.mark_as_answered();
}
}
void local_actor::forward_message(const actor& dest, message_priority p) {
if (!dest) return;
auto id = (p == message_priority::high)
? m_current_node->mid.with_high_priority()
: m_current_node->mid.with_normal_priority();
detail::raw_access::get(dest)->enqueue({m_current_node->sender, detail::raw_access::get(dest), id}, m_current_node->msg);
// treat this message as asynchronous message from now on
m_current_node->mid = message_id::invalid;
}
void local_actor::send_tuple(message_priority prio, const channel& dest, any_tuple what) {
if (!dest) return;
message_id id;
if (prio == message_priority::high) id = id.with_high_priority();
dest->enqueue({address(), dest, id}, std::move(what));
}
void local_actor::send_exit(const actor_addr& whom, std::uint32_t reason) {
send(detail::raw_access::get(whom), exit_msg{address(), reason});
}
void local_actor::delayed_send_tuple(message_priority prio,
const channel& dest,
const util::duration& rel_time,
cppa::any_tuple msg) {
message_id mid;
if (prio == message_priority::high) mid = mid.with_high_priority();
get_scheduler()->delayed_send({address(), dest, mid},
rel_time, std::move(msg));
}
response_promise local_actor::make_response_promise() {
auto n = m_current_node;
response_promise result{address(), n->sender, n->mid.response_id()};
n->mid.mark_as_answered();
return result;
}
void local_actor::cleanup(std::uint32_t reason) {
CPPA_LOG_TRACE(CPPA_ARG(reason));
m_subscriptions.clear();
super::cleanup(reason);
}
void local_actor::quit(std::uint32_t reason) {
CPPA_LOG_TRACE("reason = " << reason
<< ", class " << detail::demangle(typeid(*this)));
if (reason == exit_reason::unallowed_function_call) {
// this is the only reason that causes an exception
cleanup(reason);
CPPA_LOG_WARNING("actor tried to use a blocking function");
// when using receive(), the non-blocking nature of event-based
// actors breaks any assumption the user has about his code,
// in particular, receive_loop() is a deadlock when not throwing
// an exception here
aout(this) << "*** warning: event-based actor killed because it tried "
"to use receive()\n";
throw actor_exited(reason);
}
planned_exit_reason(reason);
}
message_id local_actor::timed_sync_send_tuple_impl(message_priority mp,
const actor& dest,
const util::duration& rtime,
any_tuple&& what) {
auto nri = new_request_id();
if (mp == message_priority::high) nri = nri.with_high_priority();
dest->enqueue({address(), dest, nri}, std::move(what));
auto rri = nri.response_id();
get_scheduler()->delayed_send({address(), this, rri}, rtime,
make_any_tuple(sync_timeout_msg{}));
return rri;
}
message_id local_actor::sync_send_tuple_impl(message_priority mp,
const actor& dest,
any_tuple&& what) {
auto nri = new_request_id();
if (mp == message_priority::high) nri = nri.with_high_priority();
dest->enqueue({address(), dest, nri}, std::move(what));
return nri.response_id();
}
void anon_send_exit(const actor_addr& whom, std::uint32_t reason) {
auto ptr = detail::raw_access::get(whom);
ptr->enqueue({invalid_actor_addr, ptr, message_id{}.with_high_priority()},
make_any_tuple(exit_msg{invalid_actor_addr, reason}));
}
} // namespace cppa
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