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1 | |
2 | // Copyright Oliver Kowalke 2013. | |
3 | // Distributed under the Boost Software License, Version 1.0. | |
4 | // (See accompanying file LICENSE_1_0.txt or copy at | |
5 | // http://www.boost.org/LICENSE_1_0.txt) | |
6 | ||
7 | #ifndef BOOST_FIBERS_DETAIL_CONVERT_H | |
8 | #define BOOST_FIBERS_DETAIL_CONVERT_H | |
9 | ||
10 | #include <chrono> | |
11 | #include <memory> | |
12 | ||
13 | #include <boost/config.hpp> | |
14 | ||
15 | #include <boost/fiber/detail/config.hpp> | |
16 | ||
17 | #ifdef BOOST_HAS_ABI_HEADERS | |
18 | # include BOOST_ABI_PREFIX | |
19 | #endif | |
20 | ||
21 | namespace boost { | |
22 | namespace fibers { | |
23 | namespace detail { | |
24 | ||
25 | inline | |
26 | std::chrono::steady_clock::time_point convert( | |
27 | std::chrono::steady_clock::time_point const& timeout_time) noexcept { | |
28 | return timeout_time; | |
29 | } | |
30 | ||
31 | template< typename Clock, typename Duration > | |
32 | std::chrono::steady_clock::time_point convert( | |
33 | std::chrono::time_point< Clock, Duration > const& timeout_time) { | |
34 | return std::chrono::steady_clock::now() + ( timeout_time - Clock::now() ); | |
35 | } | |
36 | ||
37 | // suggested by Howard Hinnant | |
38 | template< typename T > | |
39 | inline | |
40 | T * convert( T * p) noexcept { | |
41 | return p; | |
42 | } | |
43 | ||
44 | template< typename Pointer > | |
45 | inline | |
46 | typename std::pointer_traits< Pointer >::element_type * | |
47 | convert( Pointer p) noexcept { | |
48 | return nullptr != p | |
49 | ? to_raw_pointer( p.operator->() ) | |
50 | : nullptr; | |
51 | } | |
52 | ||
53 | }}} | |
54 | ||
55 | #ifdef BOOST_HAS_ABI_HEADERS | |
56 | # include BOOST_ABI_SUFFIX | |
57 | #endif | |
58 | ||
59 | #endif // BOOST_FIBERS_DETAIL_CONVERT_H |