1 | // (C) Copyright 2012 Vicente J. Botet Escriba |
---|---|
2 | // Use, modification and distribution are subject to the |
3 | // Boost Software License, Version 1.0. (See accompanying file |
4 | // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
5 | |
6 | #include <boost/thread/detail/config.hpp> |
7 | |
8 | #ifndef BOOST_NO_EXCEPTIONS |
9 | |
10 | #include <boost/thread/futures/future_error_code.hpp> |
11 | #include <string> |
12 | |
13 | namespace boost |
14 | { |
15 | |
16 | namespace thread_detail |
17 | { |
18 | |
19 | class future_error_category : |
20 | public boost::system::error_category |
21 | { |
22 | public: |
23 | virtual const char* name() const BOOST_NOEXCEPT; |
24 | virtual std::string message(int ev) const; |
25 | }; |
26 | |
27 | const char* |
28 | future_error_category::name() const BOOST_NOEXCEPT |
29 | { |
30 | return "future"; |
31 | } |
32 | |
33 | std::string |
34 | future_error_category::message(int ev) const |
35 | { |
36 | switch (BOOST_SCOPED_ENUM_NATIVE(future_errc)(ev)) |
37 | { |
38 | case future_errc::broken_promise: |
39 | return std::string("The associated promise has been destructed prior " |
40 | "to the associated state becoming ready."); |
41 | case future_errc::future_already_retrieved: |
42 | return std::string("The future has already been retrieved from " |
43 | "the promise or packaged_task."); |
44 | case future_errc::promise_already_satisfied: |
45 | return std::string("The state of the promise has already been set."); |
46 | case future_errc::no_state: |
47 | return std::string("Operation not permitted on an object without " |
48 | "an associated state."); |
49 | } |
50 | return std::string("unspecified future_errc value\n"); |
51 | } |
52 | future_error_category future_error_category_var; |
53 | } |
54 | |
55 | BOOST_THREAD_DECL |
56 | const system::error_category& |
57 | future_category() BOOST_NOEXCEPT |
58 | { |
59 | return thread_detail::future_error_category_var; |
60 | } |
61 | |
62 | } |
63 | #endif |
64 | |
65 |