1#ifndef BOOST_THREAD_PTHREAD_TIMESPEC_HPP
2#define BOOST_THREAD_PTHREAD_TIMESPEC_HPP
3// (C) Copyright 2007-8 Anthony Williams
4// (C) Copyright 2012 Vicente J. Botet Escriba
5//
6// Distributed under the Boost Software License, Version 1.0. (See
7// accompanying file LICENSE_1_0.txt or copy at
8// http://www.boost.org/LICENSE_1_0.txt)
9
10#include <boost/thread/detail/config.hpp>
11#include <boost/thread/thread_time.hpp>
12#if defined BOOST_THREAD_USES_DATETIME
13#include <boost/date_time/posix_time/conversion.hpp>
14#endif
15#include <pthread.h>
16#ifndef _WIN32
17#include <unistd.h>
18#endif
19#ifdef BOOST_THREAD_USES_CHRONO
20#include <boost/chrono/duration.hpp>
21#endif
22
23#if defined(macintosh) || defined(__APPLE__) || defined(__APPLE_CC__)
24# define BOOST_THREAD_TIMESPEC_MAC_API
25#include <sys/time.h> //for gettimeofday and timeval
26#else
27#include <time.h> // for clock_gettime
28#endif
29
30#include <boost/config/abi_prefix.hpp>
31
32namespace boost
33{
34 namespace detail
35 {
36#if defined BOOST_THREAD_USES_DATETIME
37 inline struct timespec to_timespec(boost::system_time const& abs_time)
38 {
39 struct timespec timeout = { 0,0};
40 boost::posix_time::time_duration const time_since_epoch=abs_time-boost::posix_time::from_time_t(0);
41
42 timeout.tv_sec=time_since_epoch.total_seconds();
43 timeout.tv_nsec=(long)(time_since_epoch.fractional_seconds()*(1000000000l/time_since_epoch.ticks_per_second()));
44 return timeout;
45 }
46#endif
47#if defined BOOST_THREAD_USES_CHRONO
48 inline timespec to_timespec(chrono::nanoseconds const& ns)
49 {
50 struct timespec ts;
51 ts.tv_sec = static_cast<long>(chrono::duration_cast<chrono::seconds>(ns).count());
52 ts.tv_nsec = static_cast<long>((ns - chrono::duration_cast<chrono::seconds>(ns)).count());
53 return ts;
54 }
55
56#endif
57
58 inline timespec to_timespec(boost::intmax_t const& ns)
59 {
60 boost::intmax_t s = ns / 1000000000l;
61 struct timespec ts;
62 ts.tv_sec = static_cast<long> (s);
63 ts.tv_nsec = static_cast<long> (ns - s * 1000000000l);
64 return ts;
65 }
66 inline boost::intmax_t to_nanoseconds_int_max(timespec const& ts)
67 {
68 return static_cast<boost::intmax_t>(ts.tv_sec) * 1000000000l + ts.tv_nsec;
69 }
70 inline bool timespec_ge_zero(timespec const& ts)
71 {
72 return (ts.tv_sec >= 0) || (ts.tv_nsec >= 0);
73 }
74 inline timespec timespec_now()
75 {
76 timespec ts;
77
78#if defined(BOOST_THREAD_TIMESPEC_MAC_API)
79 timeval tv;
80 ::gettimeofday(&tv, 0);
81 ts.tv_sec = tv.tv_sec;
82 ts.tv_nsec = tv.tv_usec * 1000;
83#else
84 if ( ::clock_gettime( CLOCK_REALTIME, &ts ) )
85 {
86 BOOST_ASSERT(0 && "Boost::Thread - Internal Error");
87 }
88#endif
89 return ts;
90 }
91 inline timespec timespec_zero()
92 {
93 timespec ts;
94 ts.tv_sec = 0;
95 ts.tv_nsec = 0;
96 return ts;
97 }
98 inline timespec timespec_plus(timespec const& lhs, timespec const& rhs)
99 {
100 return to_timespec(to_nanoseconds_int_max(lhs) + to_nanoseconds_int_max(rhs));
101 }
102 inline timespec timespec_minus(timespec const& lhs, timespec const& rhs)
103 {
104 return to_timespec(to_nanoseconds_int_max(lhs) - to_nanoseconds_int_max(rhs));
105 }
106 inline bool timespec_gt(timespec const& lhs, timespec const& rhs)
107 {
108 return to_nanoseconds_int_max(lhs) > to_nanoseconds_int_max(rhs);
109 }
110 inline bool timespec_ge(timespec const& lhs, timespec const& rhs)
111 {
112 return to_nanoseconds_int_max(lhs) >= to_nanoseconds_int_max(rhs);
113 }
114
115 }
116}
117
118#include <boost/config/abi_suffix.hpp>
119
120#endif
121