boost/thread/xtime.hpp

   1 // Copyright (C) 2001-2003
   2 // William E. Kempf
   3 // Copyright (C) 2007-8 Anthony Williams
   4 //
   5 //  Distributed under the Boost Software License, Version 1.0. (See accompanying
   6 //  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   7
   8 #ifndef BOOST_XTIME_WEK070601_HPP
   9 #define BOOST_XTIME_WEK070601_HPP
  10
  11 #include <boost/thread/detail/config.hpp>
  12
  13 #include <boost/cstdint.hpp>
  14 #include <boost/thread/thread_time.hpp>
  15 #include <boost/date_time/posix_time/conversion.hpp>
  16
  17 #include <boost/config/abi_prefix.hpp>
  18
  19 namespace boost {
  20
  21 enum xtime_clock_types
  22 {
  23     TIME_UTC=1
  24 //    TIME_TAI,
  25 //    TIME_MONOTONIC,
  26 //    TIME_PROCESS,
  27 //    TIME_THREAD,
  28 //    TIME_LOCAL,
  29 //    TIME_SYNC,
  30 //    TIME_RESOLUTION
  31 };
  32
  33 struct xtime
  34 {
  35 #if defined(BOOST_NO_INT64_T)
  36     typedef int_fast32_t xtime_sec_t; //INT_FAST32_MIN <= sec <= INT_FAST32_MAX
  37 #else
  38     typedef int_fast64_t xtime_sec_t; //INT_FAST64_MIN <= sec <= INT_FAST64_MAX
  39 #endif
  40
  41     typedef int_fast32_t xtime_nsec_t; //0 <= xtime.nsec < NANOSECONDS_PER_SECOND
  42
  43     xtime_sec_t sec;
  44     xtime_nsec_t nsec;
  45
  46     operator system_time() const
  47     {
  48         return boost::posix_time::from_time_t(0)+
  49             boost::posix_time::seconds(static_cast<long>(sec))+
  50 #ifdef BOOST_DATE_TIME_HAS_NANOSECONDS
  51             boost::posix_time::nanoseconds(nsec);
  52 #else
  53         boost::posix_time::microseconds((nsec+500)/1000);
  54 #endif
  55     }
  56
  57 };
  58
  59 inline xtime get_xtime(boost::system_time const& abs_time)
  60 {
  61     xtime res;
  62     boost::posix_time::time_duration const time_since_epoch=abs_time-boost::posix_time::from_time_t(0);
  63
  64     res.sec=static_cast<xtime::xtime_sec_t>(time_since_epoch.total_seconds());
  65     res.nsec=static_cast<xtime::xtime_nsec_t>(time_since_epoch.fractional_seconds()*(1000000000/time_since_epoch.ticks_per_second()));
  66     return res;
  67 }
  68
  69 inline int xtime_get(struct xtime* xtp, int clock_type)
  70 {
  71     if (clock_type == TIME_UTC)
  72     {
  73         *xtp=get_xtime(get_system_time());
  74         return clock_type;
  75     }
  76     return 0;
  77 }
  78
  79
  80 inline int xtime_cmp(const xtime& xt1, const xtime& xt2)
  81 {
  82     if (xt1.sec == xt2.sec)
  83         return (int)(xt1.nsec - xt2.nsec);
  84     else
  85         return (xt1.sec > xt2.sec) ? 1 : -1;
  86 }
  87
  88 } // namespace boost
  89
  90 #include <boost/config/abi_suffix.hpp>
  91
  92 #endif //BOOST_XTIME_WEK070601_HPP