high-resolution-clock-struct.md

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Learn more about: high_resolution_clock struct	high_resolution_clock struct		08/19/2021	reference	chrono/std::chrono::high_resolution_clock chrono/std::chrono::high_resolution_clock::now" chrono/std::chrono::high_resolution_clock::is_steady constant	std::chrono [C++], high_resolution_clock	C++	tylermsft	cplusplus

high_resolution_clock struct

Represents a high_resolution clock with the smallest possible tick period. Specifically, the period is a nanosecond, or ratio<1, 1000000000>

In Microsoft's implementation, high_resolution_clock is a synonym for steady_clock.

Syntax

using high_resolution_clock = steady_clock;

Members

Convenience type aliases

Name	Description
high_resolution_clock::duration	In Microsoft's implementation, it's a synonym for nanoseconds, which is defined as duration<long long, nano>. It represents a duration of time measured in billionths of a second.
high_resolution_clock::period	In Microsoft's implementation, it's a synonym for nano, which is defined as std::ratio<1i64, 1000000000i64> . It represents the time in seconds (one billionth of a second) between each tick in the duration.
high_resolution_clock::rep	A synonym for long long, which is the type used in the Microsoft implementation to represent the number of clock ticks in a high_resolution_clock::duration.
high_resolution_clock::time_point	A synonym for time_point<steady_clock>. Used to represent a time_point for this clock.

Functions

Name	Description
now	Returns the current high_resolution_clock time.

Constants

Name	Description
is_steady	Holds true. A high_resolution_clock is steady. That means you can use this clock to take the time before an event, the time after an event, and reliably subtract them to get the duration of the event because the clock won't be adjusted during that time.

See also

<chrono>
file_clock class
gps_clock class
local_t struct
steady_clock struct
system_clock struct
tai_clock class
utc_clock class
Header Files Reference