From cppreference.com
template<classClock,classDuration>voidsleep_until(conststd::chrono::time_point<Clock,Duration>&sleep_time);(since C++11)Blocks the execution of the current thread until specified sleep_time has been reached.
Clock must meet the
requirements. The program is ill-formed if std::chrono::is_clock_v<Clock> is false.(since C++20)
The standard recommends that the clock tied to sleep_time be used, in which case adjustments of the clock may be taken into account. Thus, the duration of the block might be more or less than sleep_time-Clock::now() at the time of the call, depending on the direction of the adjustment and whether it is honored by the implementation. The function also may block until after sleep_time has been reached due to process scheduling or resource contention delays.
Parameters
sleep_time - time to block until Return value
(none)
Exceptions
Any exception thrown by Clock or Duration (clocks and durations provided by the standard library never throw).
Example
Run this code
#include<chrono>#include<iostream>#include<thread>autonow(){returnstd::chrono::steady_clock::now();}autoawake_time(){usingstd::chrono::operator""ms;returnnow()+2000ms;}intmain(){std::cout<<"Hello, waiter...\n"<<std::flush;constautostart{now()};std::this_thread::sleep_until(awake_time());std::chrono::duration<double,std::milli>elapsed{now()-start};std::cout<<"Waited "<<elapsed.count()<<" ms\n";}Possible output:
Hello, waiter... Waited 2000.17 ms See also