| // |
| // detail/thread_group.hpp |
| // ~~~~~~~~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2016 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) |
| // |
| |
| #ifndef ASIO_DETAIL_THREAD_GROUP_HPP |
| #define ASIO_DETAIL_THREAD_GROUP_HPP |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1200) |
| # pragma once |
| #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
| |
| #include "asio/detail/config.hpp" |
| #include "asio/detail/scoped_ptr.hpp" |
| #include "asio/detail/thread.hpp" |
| |
| namespace asio { |
| namespace detail { |
| |
| class thread_group |
| { |
| public: |
| // Constructor initialises an empty thread group. |
| thread_group() |
| : first_(0) |
| { |
| } |
| |
| // Destructor joins any remaining threads in the group. |
| ~thread_group() |
| { |
| join(); |
| } |
| |
| // Create a new thread in the group. |
| template <typename Function> |
| void create_thread(Function f) |
| { |
| first_ = new item(f, first_); |
| } |
| |
| // Create new threads in the group. |
| template <typename Function> |
| void create_threads(Function f, std::size_t num_threads) |
| { |
| for (std::size_t i = 0; i < num_threads; ++i) |
| create_thread(f); |
| } |
| |
| // Wait for all threads in the group to exit. |
| void join() |
| { |
| while (first_) |
| { |
| first_->thread_.join(); |
| item* tmp = first_; |
| first_ = first_->next_; |
| delete tmp; |
| } |
| } |
| |
| private: |
| // Structure used to track a single thread in the group. |
| struct item |
| { |
| template <typename Function> |
| explicit item(Function f, item* next) |
| : thread_(f), |
| next_(next) |
| { |
| } |
| |
| asio::detail::thread thread_; |
| item* next_; |
| }; |
| |
| // The first thread in the group. |
| item* first_; |
| }; |
| |
| } // namespace detail |
| } // namespace asio |
| |
| #endif // ASIO_DETAIL_THREAD_GROUP_HPP |