103 lines
3.3 KiB
C++
103 lines
3.3 KiB
C++
/*
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* nghttp2 - HTTP/2 C Library
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*
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* Copyright (c) 2014 Tatsuhiro Tsujikawa
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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// We wrote this code based on the original code which has the
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// following license:
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//
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// io_service_pool.cpp
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// ~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2013 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#include "asio_io_service_pool.h"
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namespace nghttp2 {
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namespace asio_http2 {
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io_service_pool::io_service_pool(std::size_t pool_size) : next_io_service_(0) {
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if (pool_size == 0) {
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throw std::runtime_error("io_service_pool size is 0");
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}
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// Give all the io_services work to do so that their run() functions will not
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// exit until they are explicitly stopped.
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for (std::size_t i = 0; i < pool_size; ++i) {
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auto io_service = std::make_shared<boost::asio::io_service>();
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auto work = std::make_shared<boost::asio::io_service::work>(*io_service);
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io_services_.push_back(io_service);
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work_.push_back(work);
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}
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}
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void io_service_pool::run(bool asynchronous) {
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// Create a pool of threads to run all of the io_services.
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for (std::size_t i = 0; i < io_services_.size(); ++i) {
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futures_.push_back(std::async(std::launch::async,
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(size_t(boost::asio::io_service::*)(void)) &
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boost::asio::io_service::run,
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io_services_[i]));
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}
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if (!asynchronous) {
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join();
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}
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}
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void io_service_pool::join() {
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// Wait for all threads in the pool to exit.
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for (auto &fut : futures_) {
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fut.get();
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}
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}
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void io_service_pool::stop() {
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// Explicitly stop all io_services.
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for (auto &iosv : io_services_) {
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iosv->stop();
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}
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}
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boost::asio::io_service &io_service_pool::get_io_service() {
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// Use a round-robin scheme to choose the next io_service to use.
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auto &io_service = *io_services_[next_io_service_];
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++next_io_service_;
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if (next_io_service_ == io_services_.size()) {
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next_io_service_ = 0;
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}
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return io_service;
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}
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const std::vector<std::shared_ptr<boost::asio::io_service>> &
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io_service_pool::io_services() const {
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return io_services_;
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}
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} // namespace asio_http2
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} // namespace nghttp2
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