std::this_thread::sleep_for

From cppreference.com
< cpp‎ | thread
 
 
Concurrency support library
Threads
(C++11)
(C++20)
(C++20)
this_thread namespace
(C++11)
(C++11)
sleep_for
(C++11)
Atomic types
(C++11)
(C++20)
Initialization of atomic types
(C++11)(deprecated in C++20)
(C++11)(deprecated in C++20)
Free functions for atomic operations
Free functions for atomic flags
Memory ordering
Mutual exclusion
(C++11)
Generic lock management
(C++11)
(C++11)
(C++11)
(C++11)(C++11)(C++11)
(C++11)
(C++11)
Condition variables
(C++11)
Semaphores
Latches and barriers
(C++20)
(C++20)
Futures
(C++11)
(C++11)
(C++11)
(C++11)
 
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

#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

See also

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