...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::date_time::microsec_clock — A clock providing microsecond level resolution.
// In header: <boost/date_time/microsec_time_clock.hpp> template<typename time_type> class microsec_clock { public: // types typedef time_type::date_type date_type; typedef time_type::time_duration_type time_duration_type; typedef time_duration_type::rep_type resolution_traits_type; // public static functions template<typename time_zone_type> static time_type local_time(shared_ptr< time_zone_type >); static time_type local_time(); static time_type universal_time(); // private static functions static time_type create_time(time_converter); static boost::uint64_t file_time_to_microseconds(boost::winapi::FILETIME_ const &); };
A high precision clock that measures the local time at a resolution up to microseconds and adjusts to the resolution of the time system. For example, for the a library configuration with nano second resolution, the last 3 places of the fractional seconds will always be 000 since there are 1000 nano-seconds in a micro second.
microsec_clock
public static functionstemplate<typename time_zone_type> static time_type local_time(shared_ptr< time_zone_type > tz_ptr);return a local time object for the given zone, based on computer clock
static time_type local_time();Returns the local time based on computer clock settings.
static time_type universal_time();Returns the UTC time based on computer settings.
microsec_clock
private static functionsstatic time_type create_time(time_converter converter);
static boost::uint64_t file_time_to_microseconds(boost::winapi::FILETIME_ const & ft);
The function converts file_time into number of microseconds elapsed since 1970-Jan-01
Note | |
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Only dates after 1970-Jan-01 are supported. Dates before will be wrapped. |