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 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(2000ms);
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