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/*
* Copyright (c) 2017-2019 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <hicn/transport/config.h>
#include <hicn/transport/errors/runtime_exception.h>
#include <asio.hpp>
#include <memory>
#include <thread>
namespace utils {
class EventThread {
private:
// No copies
EventThread(const EventThread&) = delete; // non construction-copyable
EventThread& operator=(const EventThread&) = delete; // non copyable
public:
explicit EventThread(asio::io_service& io_service)
: internal_io_service_(nullptr),
io_service_(io_service),
work_(std::make_unique<asio::io_service::work>(io_service_)),
thread_(nullptr) {
run();
}
explicit EventThread()
: internal_io_service_(std::make_unique<asio::io_service>()),
io_service_(*internal_io_service_),
work_(std::make_unique<asio::io_service::work>(io_service_)),
thread_(nullptr) {
run();
}
~EventThread() { stop(); }
void run() {
if (stopped()) {
io_service_.reset();
}
thread_ = std::make_unique<std::thread>([this]() { io_service_.run(); });
}
std::thread::id getThreadId() const {
if (thread_) {
return thread_->get_id();
} else {
throw errors::RuntimeException("Event thread is not running.");
}
}
template <typename Func>
void add(Func&& f) {
// If the function f
// TODO USe post in mac os, asio->post in xenial
io_service_.post(std::forward<Func&&>(f));
}
template <typename Func>
void tryRunHandlerNow(Func&& f) {
io_service_.dispatch(std::forward<Func&&>(f));
}
void stop() {
work_.reset();
if (thread_ && thread_->joinable()) {
thread_->join();
}
thread_.reset();
}
bool stopped() { return io_service_.stopped(); }
asio::io_service& getIoService() { return io_service_; }
private:
std::unique_ptr<asio::io_service> internal_io_service_;
asio::io_service& io_service_;
std::unique_ptr<asio::io_service::work> work_;
std::unique_ptr<std::thread> thread_;
};
} // namespace utils
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