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std::this_t...d::sleep_for(3)  C++ Standard Libary std::this_t...d::sleep_for(3)

NAME
     std::this_thread::sleep_for - std::this_thread::sleep_for

Synopsis
	Defined in header <thread>
	template< class Rep, class Period >
	void	 sleep_for(	const	  std::chrono::duration<Rep,	Period>&
     (since C++11)
	sleep_duration );

	Blocks the execution of the current thread for at least the specified
	sleep_duration.

	This function may block for longer than sleep_duration due to scheduling
     or resource
	contention delays.

	The standard recommends that a steady clock is used to measure the dura-
     tion. If an
	implementation uses a system clock instead, the wait time  may	also  be
     sensitive to
	clock adjustments.

Parameters
	sleep_duration - time duration to sleep

Return value
	(none)

Exceptions
	Any exception thrown by clock, time_point, or duration during the execu-
     tion (clocks,
	time  points,  and  durations  provided  by  the  standard library never
     throw).

Example
     // Run this code

      #include <chrono>
      #include <iostream>
      #include <thread>

      int main()
      {
	  using namespace std::chrono_literals;

	  std::cout << "Hello waiter\n" << std::flush;

	  const auto start = std::chrono::high_resolution_clock::now();
	  std::this_thread::sleep_for(2000ms);
	  const auto end = std::chrono::high_resolution_clock::now();
	  const std::chrono::duration<double, std::milli> elapsed = end - start;

	  std::cout << "Waited " << elapsed << '\n';
      }

Possible output:
      Hello waiter
      Waited 2000.13 ms

See also
	sleep_until stops the execution of the current thread until a  specified
     time point
	(C++11)     (function)

http://cppreference.com 	   2024.06.10	   std::this_t...d::sleep_for(3)
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