std::this_thread::sleep_for (3) - Linux Manuals

std::this_thread::sleep_for: std::this_thread::sleep_for

NAME

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

Synopsis

Defined in header <thread>
template< class Rep, class Period > (since C++11)
void sleep_for( const std::chrono::duration<Rep, Period>& 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 duration. 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 execution (clocks, time points, and durations provided by the standard library never throw).

Example

// Run this code

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

  int main()
  {
      using namespace std::chrono_literals;
      std::cout << "Hello waiter\n" << std::flush;
      auto start = std::chrono::high_resolution_clock::now();
      std::this_thread::sleep_for(2s);
      auto end = std::chrono::high_resolution_clock::now();
      std::chrono::duration<double, std::milli> elapsed = end-start;
      std::cout << "Waited " << elapsed.count() << " ms\n";
  }

Possible output:

  Hello waiter
  Waited 2000.12 ms