Source

`stdlib/time/time.cpp`

2// Original work; see ACKNOWLEDGMENTS.md for the open-source ideas we build upon.

3#include "time.hpp"

5#include <chrono>

6#include <ctime>

7#include <thread>

9namespace cheatah::time {

11namespace {

12using std::chrono::duration;

13using std::chrono::duration_cast;

14using std::chrono::nanoseconds;

15using std::chrono::steady_clock;

16using std::chrono::system_clock;

17} // namespace

19double time() { return duration<double>(system_clock::now().time_since_epoch()).count(); }

20long long time_ns() {

21 return duration_cast<nanoseconds>(system_clock::now().time_since_epoch()).count();

22}

24double monotonic() { return duration<double>(steady_clock::now().time_since_epoch()).count(); }

25long long monotonic_ns() {

26 return duration_cast<nanoseconds>(steady_clock::now().time_since_epoch()).count();

27}

29// steady_clock is the highest-resolution monotonic clock the platform offers.

30double perf_counter() { return duration<double>(steady_clock::now().time_since_epoch()).count(); }

31long long perf_counter_ns() {

32 return duration_cast<nanoseconds>(steady_clock::now().time_since_epoch()).count();

33}

35double process_time() { return static_cast<double>(std::clock()) / CLOCKS_PER_SEC; }

37void sleep(double seconds) { std::this_thread::sleep_for(duration<double>(seconds)); }

39} // namespace cheatah::time