std::this_thread::sleep_for

 

C++

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hardware_destructive_interference_sizehardware_constructive_interference_size (C++17)(C++17)
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Defined in header <thread>
template< class Rep, class Period > void sleep_for( const std::chrono::duration<Rep, Period>& sleep_duration );		(since C++11)

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" << std::endl; // flush is intentional
    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

See also

sleep_until (C++11)

stops the execution of the current thread until a specified time point (function)