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b32b8144 FG |
1 | // |
2 | // system_context.hpp | |
3 | // ~~~~~~~~~~~~~~~~~~ | |
4 | // | |
f67539c2 | 5 | // Copyright (c) 2003-2020 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
b32b8144 FG |
6 | // |
7 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | |
8 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
9 | // | |
10 | ||
11 | #ifndef BOOST_ASIO_SYSTEM_CONTEXT_HPP | |
12 | #define BOOST_ASIO_SYSTEM_CONTEXT_HPP | |
13 | ||
14 | #if defined(_MSC_VER) && (_MSC_VER >= 1200) | |
15 | # pragma once | |
16 | #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) | |
17 | ||
18 | #include <boost/asio/detail/config.hpp> | |
19 | #include <boost/asio/detail/scheduler.hpp> | |
20 | #include <boost/asio/detail/thread_group.hpp> | |
20effc67 | 21 | #include <boost/asio/execution.hpp> |
b32b8144 FG |
22 | #include <boost/asio/execution_context.hpp> |
23 | ||
24 | #include <boost/asio/detail/push_options.hpp> | |
25 | ||
26 | namespace boost { | |
27 | namespace asio { | |
28 | ||
20effc67 TL |
29 | template <typename Blocking, typename Relationship, typename Allocator> |
30 | class basic_system_executor; | |
b32b8144 FG |
31 | |
32 | /// The executor context for the system executor. | |
33 | class system_context : public execution_context | |
34 | { | |
35 | public: | |
36 | /// The executor type associated with the context. | |
20effc67 TL |
37 | typedef basic_system_executor< |
38 | execution::blocking_t::possibly_t, | |
39 | execution::relationship_t::fork_t, | |
40 | std::allocator<void> | |
41 | > executor_type; | |
b32b8144 FG |
42 | |
43 | /// Destructor shuts down all threads in the system thread pool. | |
44 | BOOST_ASIO_DECL ~system_context(); | |
45 | ||
46 | /// Obtain an executor for the context. | |
47 | executor_type get_executor() BOOST_ASIO_NOEXCEPT; | |
48 | ||
49 | /// Signal all threads in the system thread pool to stop. | |
50 | BOOST_ASIO_DECL void stop(); | |
51 | ||
52 | /// Determine whether the system thread pool has been stopped. | |
53 | BOOST_ASIO_DECL bool stopped() const BOOST_ASIO_NOEXCEPT; | |
54 | ||
55 | /// Join all threads in the system thread pool. | |
56 | BOOST_ASIO_DECL void join(); | |
57 | ||
58 | #if defined(GENERATING_DOCUMENTATION) | |
59 | private: | |
60 | #endif // defined(GENERATING_DOCUMENTATION) | |
61 | // Constructor creates all threads in the system thread pool. | |
62 | BOOST_ASIO_DECL system_context(); | |
63 | ||
64 | private: | |
20effc67 | 65 | template <typename, typename, typename> friend class basic_system_executor; |
b32b8144 FG |
66 | |
67 | struct thread_function; | |
68 | ||
92f5a8d4 TL |
69 | // Helper function to create the underlying scheduler. |
70 | BOOST_ASIO_DECL detail::scheduler& add_scheduler(detail::scheduler* s); | |
71 | ||
b32b8144 FG |
72 | // The underlying scheduler. |
73 | detail::scheduler& scheduler_; | |
74 | ||
75 | // The threads in the system thread pool. | |
76 | detail::thread_group threads_; | |
20effc67 TL |
77 | |
78 | // The number of threads in the pool. | |
79 | std::size_t num_threads_; | |
b32b8144 FG |
80 | }; |
81 | ||
82 | } // namespace asio | |
83 | } // namespace boost | |
84 | ||
85 | #include <boost/asio/detail/pop_options.hpp> | |
86 | ||
87 | #include <boost/asio/impl/system_context.hpp> | |
88 | #if defined(BOOST_ASIO_HEADER_ONLY) | |
89 | # include <boost/asio/impl/system_context.ipp> | |
90 | #endif // defined(BOOST_ASIO_HEADER_ONLY) | |
91 | ||
92 | #endif // BOOST_ASIO_SYSTEM_CONTEXT_HPP |