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/time_clock.hpp> 10 #include <boost/date_time/microsec_time_clock.hpp> 11 #include <boost/date_time/posix_time/posix_time_types.hpp> 12 13 #include <boost/config/abi_prefix.hpp> 14 15 namespace boost 16 { 17 typedef boost::posix_time::ptime system_time; 18 get_system_time()19 inline system_time get_system_time() 20 { 21 #if defined(BOOST_DATE_TIME_HAS_HIGH_PRECISION_CLOCK) 22 return boost::date_time::microsec_clock<system_time>::universal_time(); 23 #else // defined(BOOST_DATE_TIME_HAS_HIGH_PRECISION_CLOCK) 24 return boost::date_time::second_clock<system_time>::universal_time(); 25 #endif // defined(BOOST_DATE_TIME_HAS_HIGH_PRECISION_CLOCK) 26 } 27 28 namespace detail 29 { get_system_time_sentinel()30 inline system_time get_system_time_sentinel() 31 { 32 return system_time(boost::posix_time::pos_infin); 33 } 34 get_milliseconds_until(system_time const & target_time)35 inline unsigned long get_milliseconds_until(system_time const& target_time) 36 { 37 if(target_time.is_pos_infinity()) 38 { 39 return ~(unsigned long)0; 40 } 41 system_time const now=get_system_time(); 42 if(target_time<=now) 43 { 44 return 0; 45 } 46 return static_cast<unsigned long>((target_time-now).total_milliseconds()+1); 47 } 48 49 } 50 51 } 52 53 #include <boost/config/abi_suffix.hpp> 54 55 #endif 56