]>
Commit | Line | Data |
---|---|---|
92f5a8d4 TL |
1 | // Copyright (c) 2016 Klemens D. Morgenstern |
2 | // | |
3 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | |
4 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
5 | ||
6 | #ifndef BOOST_PROCESS_DETAIL_USED_HANDLES_HPP_ | |
7 | #define BOOST_PROCESS_DETAIL_USED_HANDLES_HPP_ | |
8 | ||
9 | #include <type_traits> | |
10 | #include <boost/fusion/include/filter_if.hpp> | |
11 | #include <boost/fusion/include/for_each.hpp> | |
12 | ||
13 | #if defined(BOOST_POSIX_API) | |
14 | #include <boost/process/detail/posix/handles.hpp> | |
15 | #include <boost/process/detail/posix/asio_fwd.hpp> | |
16 | #else | |
17 | #include <boost/process/detail/windows/handles.hpp> | |
18 | #include <boost/process/detail/windows/asio_fwd.hpp> | |
19 | #endif | |
20 | ||
21 | namespace boost { namespace process { namespace detail { | |
22 | ||
23 | struct uses_handles | |
24 | { | |
25 | //If you get an error here, you must add a `get_handles` function that returns a range or a single handle value | |
26 | void get_used_handles() const; | |
27 | }; | |
28 | ||
29 | template<typename T> | |
30 | struct does_use_handle: std::is_base_of<uses_handles, T> {}; | |
31 | ||
32 | template<typename T> | |
33 | struct does_use_handle<T&> : std::is_base_of<uses_handles, T> {}; | |
34 | ||
35 | template<typename T> | |
36 | struct does_use_handle<const T&> : std::is_base_of<uses_handles, T> {}; | |
37 | ||
38 | template<typename Char, typename Sequence> | |
39 | class executor; | |
40 | ||
41 | template<typename Func> | |
42 | struct foreach_handle_invocator | |
43 | { | |
44 | Func & func; | |
45 | foreach_handle_invocator(Func & func) : func(func) {} | |
46 | ||
47 | ||
48 | template<typename Range> | |
49 | void invoke(const Range & range) const | |
50 | { | |
51 | for (auto handle_ : range) | |
52 | func(handle_); | |
53 | ||
54 | } | |
55 | void invoke(::boost::process::detail::api::native_handle_type handle) const {func(handle);}; | |
56 | ||
57 | template<typename T> | |
58 | void operator()(T & val) const {invoke(val.get_used_handles());} | |
59 | }; | |
60 | ||
61 | template<typename Executor, typename Function> | |
62 | void foreach_used_handle(Executor &exec, Function &&func) | |
63 | { | |
64 | boost::fusion::for_each(boost::fusion::filter_if<does_use_handle<boost::mpl::_>>(exec.seq), | |
65 | foreach_handle_invocator<Function>(func)); | |
66 | } | |
67 | ||
68 | template<typename Executor> | |
69 | std::vector<::boost::process::detail::api::native_handle_type> | |
70 | get_used_handles(Executor &exec) | |
71 | { | |
72 | std::vector<::boost::process::detail::api::native_handle_type> res; | |
73 | foreach_used_handle(exec, [&](::boost::process::detail::api::native_handle_type handle){res.push_back(handle);}); | |
74 | return res; | |
75 | } | |
76 | ||
77 | ||
78 | ||
79 | }}} | |
80 | ||
81 | #endif /* BOOST_PROCESS_DETAIL_USED_HANDLES_HPP_ */ |