boost/thread/thread_time.hpp

   1 #ifndef BOOST_THREAD_TIME_HPP
   2 #define BOOST_THREAD_TIME_HPP
   3 //  (C) Copyright 2007 Anthony Williams
   4 //
   5 //  Distributed under the Boost Software License, Version 1.0. (See
   6 //  accompanying file LICENSE_1_0.txt or copy at
   7 //  http://www.boost.org/LICENSE_1_0.txt)
   8
   9 #include <boost/date_time/microsec_time_clock.hpp>
  10 #include <boost/date_time/posix_time/posix_time_types.hpp>
  11
  12 #include <boost/config/abi_prefix.hpp>
  13
  14 namespace boost
  15 {
  16     typedef boost::posix_time::ptime system_time;
  17
  18     inline system_time get_system_time()
  19     {
  20         return boost::date_time::microsec_clock<system_time>::universal_time();
  21     }
  22
  23     namespace detail
  24     {
  25         inline system_time get_system_time_sentinel()
  26         {
  27             return system_time(boost::posix_time::pos_infin);
  28         }
  29
  30         inline unsigned long get_milliseconds_until(system_time const& target_time)
  31         {
  32             if(target_time.is_pos_infinity())
  33             {
  34                 return ~(unsigned long)0;
  35             }
  36             system_time const now=get_system_time();
  37             if(target_time<=now)
  38             {
  39                 return 0;
  40             }
  41             return static_cast<unsigned long>((target_time-now).total_milliseconds()+1);
  42         }
  43
  44     }
  45
  46 }
  47
  48 #include <boost/config/abi_suffix.hpp>
  49
  50 #endif