rcpp_framework/web_backends/drogon/trantor/net/EventLoopThread.cc

/**
 *
 *  @file EventLoopThread.cc
 *  @author An Tao
 *
 *  Public header file in trantor lib.
 *
 *  Copyright 2018, An Tao.  All rights reserved.
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the License file.
 *
 *
 */

#include <trantor/net/EventLoopThread.h>
#include <trantor/utils/Logger.h>
#ifdef __linux__
#include <sys/prctl.h>
#endif

using namespace trantor;
EventLoopThread::EventLoopThread(const std::string &threadName) :
		loop_(nullptr),
		loopThreadName_(threadName),
		thread_([this]() { loopFuncs(); }) {
	auto f = promiseForLoopPointer_.get_future();
	loop_ = f.get();
}
EventLoopThread::~EventLoopThread() {
	run();
	if (loop_) {
		loop_->quit();
	}
	if (thread_.joinable()) {
		thread_.join();
	}
}
// void EventLoopThread::stop() {
//    if(loop_)
//        loop_->quit();
//}
void EventLoopThread::wait() {
	thread_.join();
}
void EventLoopThread::loopFuncs() {
#ifdef __linux__
	::prctl(PR_SET_NAME, loopThreadName_.c_str());
#endif
	EventLoop loop;
	loop.queueInLoop([this]() { promiseForLoop_.set_value(1); });
	promiseForLoopPointer_.set_value(&loop);
	auto f = promiseForRun_.get_future();
	(void)f.get();
	loop.loop();
	// LOG_DEBUG << "loop out";
	loop_ = NULL;
}
void EventLoopThread::run() {
	std::call_once(once_, [this]() {
		auto f = promiseForLoop_.get_future();
		promiseForRun_.set_value(1);
		// Make sure the event loop loops before returning.
		(void)f.get();
	});
}