Difference between revisions of "cpp/thread/sleep for"
From cppreference.com
(back to how it was. Sure it was a C++11 function, but avoiding literals in 2017 is just bad practice..) |
(improve example-code) |
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{ | { | ||
using namespace std::chrono_literals; | using namespace std::chrono_literals; | ||
| − | std::cout << "Hello waiter" << std:: | + | std::cout << "Hello waiter\n" << std::flush; |
auto start = std::chrono::high_resolution_clock::now(); | auto start = std::chrono::high_resolution_clock::now(); | ||
std::this_thread::sleep_for(2s); | std::this_thread::sleep_for(2s); | ||
Revision as of 10:01, 4 February 2019
| Defined in header <thread>
|
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| 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.
Contents |
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
See also
| (C++11) |
stops the execution of the current thread until a specified time point (function) |
