1 | #ifndef BOOST_SMART_PTR_DETAIL_SP_THREAD_SLEEP_HPP_INCLUDED |
2 | #define BOOST_SMART_PTR_DETAIL_SP_THREAD_SLEEP_HPP_INCLUDED |
3 | |
4 | // MS compatible compilers support #pragma once |
5 | |
6 | #if defined(_MSC_VER) && (_MSC_VER >= 1020) |
7 | # pragma once |
8 | #endif |
9 | |
10 | // boost/smart_ptr/detail/sp_thread_sleep.hpp |
11 | // |
12 | // inline void bost::detail::sp_thread_sleep(); |
13 | // |
14 | // Cease execution for a while to yield to other threads, |
15 | // as if by calling nanosleep() with an appropriate interval. |
16 | // |
17 | // Copyright 2008, 2020 Peter Dimov |
18 | // Distributed under the Boost Software License, Version 1.0 |
19 | // https://www.boost.org/LICENSE_1_0.txt |
20 | |
21 | #include <boost/config.hpp> |
22 | #include <boost/config/pragma_message.hpp> |
23 | |
24 | #if defined( WIN32 ) || defined( _WIN32 ) || defined( __WIN32__ ) || defined( __CYGWIN__ ) |
25 | |
26 | #if defined(BOOST_SP_REPORT_IMPLEMENTATION) |
27 | BOOST_PRAGMA_MESSAGE("Using Sleep(1) in sp_thread_sleep" ) |
28 | #endif |
29 | |
30 | #include <boost/smart_ptr/detail/sp_win32_sleep.hpp> |
31 | |
32 | namespace boost |
33 | { |
34 | |
35 | namespace detail |
36 | { |
37 | |
38 | inline void sp_thread_sleep() |
39 | { |
40 | Sleep( 1 ); |
41 | } |
42 | |
43 | } // namespace detail |
44 | |
45 | } // namespace boost |
46 | |
47 | #elif defined(BOOST_HAS_NANOSLEEP) |
48 | |
49 | #if defined(BOOST_SP_REPORT_IMPLEMENTATION) |
50 | BOOST_PRAGMA_MESSAGE("Using nanosleep() in sp_thread_sleep" ) |
51 | #endif |
52 | |
53 | #include <time.h> |
54 | |
55 | namespace boost |
56 | { |
57 | |
58 | namespace detail |
59 | { |
60 | |
61 | inline void sp_thread_sleep() |
62 | { |
63 | // g++ -Wextra warns on {} or {0} |
64 | struct timespec rqtp = { .tv_sec: 0, .tv_nsec: 0 }; |
65 | |
66 | // POSIX says that timespec has tv_sec and tv_nsec |
67 | // But it doesn't guarantee order or placement |
68 | |
69 | rqtp.tv_sec = 0; |
70 | rqtp.tv_nsec = 1000; |
71 | |
72 | nanosleep( requested_time: &rqtp, remaining: 0 ); |
73 | } |
74 | |
75 | } // namespace detail |
76 | |
77 | } // namespace boost |
78 | |
79 | #else |
80 | |
81 | #if defined(BOOST_SP_REPORT_IMPLEMENTATION) |
82 | BOOST_PRAGMA_MESSAGE("Using sp_thread_yield() in sp_thread_sleep" ) |
83 | #endif |
84 | |
85 | #include <boost/smart_ptr/detail/sp_thread_yield.hpp> |
86 | |
87 | namespace boost |
88 | { |
89 | |
90 | namespace detail |
91 | { |
92 | |
93 | inline void sp_thread_sleep() |
94 | { |
95 | sp_thread_yield(); |
96 | } |
97 | |
98 | } // namespace detail |
99 | |
100 | } // namespace boost |
101 | |
102 | #endif |
103 | |
104 | #endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_THREAD_SLEEP_HPP_INCLUDED |
105 | |