| // |
| // io_service_pool.cpp |
| // ~~~~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2010 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
| // |
| // Distributed under the Boost Software License, Version 1.0. (See accompanying |
| // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| // |
| |
| #include "server.hpp" |
| #include <stdexcept> |
| #include <boost/thread.hpp> |
| #include <boost/bind.hpp> |
| #include <boost/shared_ptr.hpp> |
| |
| namespace http { |
| namespace server2 { |
| |
| io_service_pool::io_service_pool(std::size_t pool_size) |
| : next_io_service_(0) |
| { |
| if (pool_size == 0) |
| throw std::runtime_error("io_service_pool size is 0"); |
| |
| // Give all the io_services work to do so that their run() functions will not |
| // exit until they are explicitly stopped. |
| for (std::size_t i = 0; i < pool_size; ++i) |
| { |
| io_service_ptr io_service(new boost::asio::io_service); |
| work_ptr work(new boost::asio::io_service::work(*io_service)); |
| io_services_.push_back(io_service); |
| work_.push_back(work); |
| } |
| } |
| |
| void io_service_pool::run() |
| { |
| // Create a pool of threads to run all of the io_services. |
| std::vector<boost::shared_ptr<boost::thread> > threads; |
| for (std::size_t i = 0; i < io_services_.size(); ++i) |
| { |
| boost::shared_ptr<boost::thread> thread(new boost::thread( |
| boost::bind(&boost::asio::io_service::run, io_services_[i]))); |
| threads.push_back(thread); |
| } |
| |
| // Wait for all threads in the pool to exit. |
| for (std::size_t i = 0; i < threads.size(); ++i) |
| threads[i]->join(); |
| } |
| |
| void io_service_pool::stop() |
| { |
| // Explicitly stop all io_services. |
| for (std::size_t i = 0; i < io_services_.size(); ++i) |
| io_services_[i]->stop(); |
| } |
| |
| boost::asio::io_service& io_service_pool::get_io_service() |
| { |
| // Use a round-robin scheme to choose the next io_service to use. |
| boost::asio::io_service& io_service = *io_services_[next_io_service_]; |
| ++next_io_service_; |
| if (next_io_service_ == io_services_.size()) |
| next_io_service_ = 0; |
| return io_service; |
| } |
| |
| } // namespace server2 |
| } // namespace http |