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351 lines (300 loc) · 11.2 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 3 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 <thread>
#include <atomic>
#include <chrono>
#include <iostream>
#include "cppa/on.hpp"
#include "cppa/self.hpp"
#include "cppa/receive.hpp"
#include "cppa/anything.hpp"
#include "cppa/to_string.hpp"
#include "cppa/scheduler.hpp"
#include "cppa/local_actor.hpp"
#include "cppa/thread_mapped_actor.hpp"
#include "cppa/detail/actor_count.hpp"
#include "cppa/detail/singleton_manager.hpp"
#include "cppa/detail/thread_pool_scheduler.hpp"
using std::move;
namespace cppa { namespace {
typedef std::uint32_t ui32;
struct exit_observer : cppa::attachable {
~exit_observer() {
cppa::detail::dec_actor_count();
}
void actor_exited(std::uint32_t) {
}
bool matches(const token&) {
return false;
}
};
inline decltype(std::chrono::high_resolution_clock::now()) now() {
return std::chrono::high_resolution_clock::now();
}
void async_send_impl(channel* to, actor* from, any_tuple&& msg) {
to->enqueue(from, move(msg));
}
void sync_reply_impl(actor* to, actor* from, message_id_t id, any_tuple&& msg) {
to->sync_enqueue(from, id, move(msg));
}
typedef void (*async_send_fun)(channel*, actor*, any_tuple&&);
typedef void (*sync_reply_fun)(actor*, actor*, message_id_t, any_tuple&&);
class delayed_msg {
public:
delayed_msg(async_send_fun arg0,
const channel_ptr& arg1,
const actor_ptr& arg2,
message_id_t,
any_tuple&& arg4)
: fun(arg0), ptr_a(arg1), from(arg2), msg(move(arg4)) { }
delayed_msg(sync_reply_fun arg0,
const actor_ptr& arg1,
const actor_ptr& arg2,
message_id_t arg3,
any_tuple&& arg4)
: fun(arg0), ptr_b(arg1), from(arg2), id(arg3), msg(move(arg4)) { }
delayed_msg(delayed_msg&&) = default;
delayed_msg(const delayed_msg&) = default;
delayed_msg& operator=(delayed_msg&&) = default;
delayed_msg& operator=(const delayed_msg&) = default;
inline void eval() {
if (fun.is_left()) (fun.left())(ptr_a.get(), from.get(), move(msg));
else (fun.right())(ptr_b.get(), from.get(), id, move(msg));
}
private:
either<async_send_fun, sync_reply_fun> fun;
channel_ptr ptr_a;
actor_ptr ptr_b;
actor_ptr from;
message_id_t id;
any_tuple msg;
};
} // namespace <anonymous>
class scheduler_helper {
public:
typedef intrusive_ptr<thread_mapped_actor> ptr_type;
void start() {
ptr_type mtimer{detail::memory::create<thread_mapped_actor>()};
ptr_type mprinter{detail::memory::create<thread_mapped_actor>()};
// launch threads
m_timer_thread = std::thread(&scheduler_helper::timer_loop, mtimer);
m_printer_thread = std::thread(&scheduler_helper::printer_loop, mprinter);
// set member variables
m_timer = mtimer;
m_printer = mprinter;
}
void stop() {
auto msg = make_any_tuple(atom("DIE"));
m_timer->enqueue(nullptr, msg);
m_printer->enqueue(nullptr, msg);
m_timer_thread.join();
m_printer_thread.join();
}
actor_ptr m_timer;
std::thread m_timer_thread;
actor_ptr m_printer;
std::thread m_printer_thread;
private:
static void timer_loop(ptr_type m_self);
static void printer_loop(ptr_type m_self);
};
template<class Map, typename Fun, class T>
void insert_dmsg(Map& storage,
const util::duration& d,
Fun fun_ptr,
const T& to,
const actor_ptr& sender,
message_id_t id,
any_tuple&& tup ) {
auto tout = now();
tout += d;
delayed_msg dmsg{fun_ptr, to, sender, id, move(tup)};
storage.insert(std::make_pair(std::move(tout), std::move(dmsg)));
}
void scheduler_helper::timer_loop(scheduler_helper::ptr_type m_self) {
typedef detail::abstract_actor<local_actor> impl_type;
typedef std::unique_ptr<detail::recursive_queue_node,detail::disposer> queue_node_ptr;
// setup & local variables
self.set(m_self.get());
auto& queue = m_self->mailbox();
std::multimap<decltype(now()), delayed_msg> messages;
queue_node_ptr msg_ptr;
//decltype(queue.pop()) msg_ptr = nullptr;
decltype(now()) tout;
bool done = false;
// message handling rules
auto mfun = (
on(atom("SEND"), arg_match) >> [&](const util::duration& d,
const channel_ptr& ptr,
any_tuple& tup) {
insert_dmsg(messages, d, async_send_impl,
ptr, msg_ptr->sender, message_id_t(), move(tup));
},
on(atom("REPLY"), arg_match) >> [&](const util::duration& d,
const actor_ptr& ptr,
message_id_t id,
any_tuple& tup) {
insert_dmsg(messages, d, sync_reply_impl,
ptr, msg_ptr->sender, id, move(tup));
},
on<atom("DIE")>() >> [&]() {
done = true;
},
others() >> [&]() {
# ifdef CPPA_DEBUG
std::cerr << "scheduler_helper::timer_loop: UNKNOWN MESSAGE: "
<< to_string(msg_ptr->msg)
<< std::endl;
# endif
}
);
// loop
while (!done) {
while (!msg_ptr) {
if (messages.empty()) {
msg_ptr.reset(queue.pop());
}
else {
tout = now();
// handle timeouts (send messages)
auto it = messages.begin();
while (it != messages.end() && (it->first) <= tout) {
it->second.eval();
messages.erase(it);
it = messages.begin();
}
// wait for next message or next timeout
if (it != messages.end()) {
msg_ptr.reset(queue.try_pop(it->first));
}
}
}
mfun(msg_ptr->msg);
msg_ptr.reset();
}
}
void scheduler_helper::printer_loop(ptr_type m_self) {
self.set(m_self.get());
std::map<actor_ptr,std::string> out;
auto flush_output = [&out](const actor_ptr& s) {
auto i = out.find(s);
if (i != out.end()) {
auto& line = i->second;
if (!line.empty()) {
std::cout << line << std::flush;
line.clear();
}
}
};
auto flush_if_needed = [](std::string& str) {
if (str.back() == '\n') {
std::cout << str << std::flush;
str.clear();
}
};
bool running = true;
receive_while (gref(running)) (
on(atom("add"), arg_match) >> [&](std::string& str) {
auto s = self->last_sender();
if (!str.empty() && s != nullptr) {
auto i = out.find(s);
if (i == out.end()) {
i = out.insert(make_pair(s, move(str))).first;
// monitor actor to flush its output on exit
self->monitor(s);
flush_if_needed(i->second);
}
else {
auto& ref = i->second;
ref += move(str);
flush_if_needed(ref);
}
}
},
on(atom("flush")) >> [&] {
flush_output(self->last_sender());
},
on(atom("DOWN"), any_vals) >> [&] {
auto s = self->last_sender();
flush_output(s);
out.erase(s);
},
on(atom("DIE")) >> [&] {
running = false;
},
others() >> [] {
//cout << "*** unexpected: "
// << to_string(self->last_dequeued())
// << endl;
}
);
}
scheduler::scheduler() : m_helper(nullptr) { }
void scheduler::initialize() {
m_helper = new scheduler_helper;
m_helper->start();
}
void scheduler::destroy() {
m_helper->stop();
delete this;
}
scheduler::~scheduler() {
delete m_helper;
}
channel* scheduler::delayed_send_helper() {
return m_helper->m_timer.get();
}
void scheduler::register_converted_context(actor* what) {
if (what) {
detail::inc_actor_count();
what->attach(new exit_observer);
}
}
attachable* scheduler::register_hidden_context() {
detail::inc_actor_count();
return new exit_observer;
}
void set_scheduler(scheduler* sched) {
if (detail::singleton_manager::set_scheduler(sched) == false) {
throw std::runtime_error("scheduler already set");
}
}
void set_default_scheduler(size_t num_threads) {
set_scheduler(new detail::thread_pool_scheduler(num_threads));
}
scheduler* get_scheduler() {
return detail::singleton_manager::get_scheduler();
}
scheduler* scheduler::create_singleton() {
return new detail::thread_pool_scheduler;
}
const actor_ptr& scheduler::printer() const {
return m_helper->m_printer;
}
} // namespace cppa
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