Objects of class system_clock represent wall clock time from the system-wide realtime clock.
class system_clock {
public:
typedef see below rep;
typedef ratio<unspecified, unspecified> period;
typedef chrono::duration<rep, period> duration;
typedef chrono::time_point<system_clock> time_point;
static constexpr bool is_steady = unspecified;
static time_point now() noexcept;
static time_t to_time_t (const time_point& t) noexcept;
static time_point from_time_t(time_t t) noexcept;
};
typedef unspecified system_clock::rep;
Requires: system_clock::duration::min() < system_clock::duration::zero() shall be true. [ Note: This implies that rep is a signed type. — end note ]
static time_t to_time_t(const time_point& t) noexcept;
Returns: A time_t object that represents the same point in time as t when both values are restricted to the coarser of the precisions of time_t and time_point. It is implementation defined whether values are rounded or truncated to the required precision.
static time_point from_time_t(time_t t) noexcept;
Returns: A time_point object that represents the same point in time as t when both values are restricted to the coarser of the precisions of time_t and time_point. It is implementation defined whether values are rounded or truncated to the required precision.
20.12.7.2 Class steady_clock [time.clock.steady]Objects of class steady_clock represent clocks for which values of time_point never decrease as physical time advances and for which values of time_point advance at a steady rate relative to real time. That is, the clock may not be adjusted.
class steady_clock {
public:
typedef unspecified rep;
typedef ratio<unspecified, unspecified> period;
typedef chrono::duration<rep, period> duration;
typedef chrono::time_point<unspecified, duration> time_point;
static constexpr bool is_steady = true;
static time_point now() noexcept;
};
20.12.7.3 Class high_resolution_clock [time.clock.hires]
Objects of class high_resolution_clock represent clocks with the shortest tick period. high_resolution_clock may be a synonym for system_clock or steady_clock.
class high_resolution_clock {
public:
typedef unspecified rep;
typedef ratio<unspecified, unspecified> period;
typedef chrono::duration<rep, period> duration;
typedef chrono::time_point<unspecified, duration> time_point;
static constexpr bool is_steady = unspecified;
static time_point now() noexcept;
};
RetroSearch is an open source project built by @garambo | Open a GitHub Issue
Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo
HTML:
3.2
| Encoding:
UTF-8
| Version:
0.7.4