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 32 namespace boost 33 { 34 namespace detail 35 { 36 #if defined BOOST_THREAD_USES_DATETIME to_timespec(boost::system_time const & abs_time)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 to_timespec(chrono::nanoseconds const & ns)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 to_timespec(boost::intmax_t const & ns)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 } to_nanoseconds_int_max(timespec const & ts)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 } timespec_ge_zero(timespec const & ts)70 inline bool timespec_ge_zero(timespec const& ts) 71 { 72 return (ts.tv_sec >= 0) || (ts.tv_nsec >= 0); 73 } timespec_now()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 } timespec_zero()91 inline timespec timespec_zero() 92 { 93 timespec ts; 94 ts.tv_sec = 0; 95 ts.tv_nsec = 0; 96 return ts; 97 } timespec_plus(timespec const & lhs,timespec const & rhs)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 } timespec_minus(timespec const & lhs,timespec const & rhs)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 } timespec_gt(timespec const & lhs,timespec const & rhs)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 } timespec_ge(timespec const & lhs,timespec const & rhs)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