Not known Facts About sleep
The returned worth of overload (3) indicates whether pred evaluated to legitimate, irrespective of whether there was a end requested or not.
atomic_compare_exchange_weakatomic_compare_exchange_weak_explicitatomic_compare_exchange_strongatomic_compare_exchange_strong_explicit
The sleep could resume earlier if a sign that is not disregarded is obtained. In this kind of situation, if remaining will not be NULL, the remaining time length is stored into the item pointed to by remaining.
The highest-stage purpose may well converse its return price or an exception to your caller by means of std::guarantee or by modifying shared variables (which may demand synchronization, see std::mutex and std::atomic).
A time stage can be a duration of your time which includes handed since the epoch of a certain clock. Defined in header Outlined in namespace std::chrono
The mutex class is actually a synchronization primitive which might be utilized to protect shared info from currently being at the same time accessed by numerous threads.
Even when the clock in use is std::chrono::steady_clock or An additional monotonic clock, a program clock adjustment may possibly induce a spurious wakeup.
Although notified underneath lock, overload (one) can make no ensures regarding the state of the involved predicate when returning as a consequence of timeout.
atomic_compare_exchange_weakatomic_compare_exchange_weak_explicitatomic_compare_exchange_strongatomic_compare_exchange_strong_explicit
This function may perhaps block for more time than sleep_duration because of scheduling or useful resource contention delays.
No two std::thread objects may well characterize the identical thread of execution; std::thread is not CopyConstructible or CopyAssignable, even though it How sleep cycle works is MoveConstructible and MoveAssignable.
std::start::deferred.
A calling thread owns a mutex with the time that it efficiently phone calls either lock or try_lock until eventually it calls unlock.
This permits the function to check if halt continues to be asked for all through its execution, and return if it has.
In the event the std::upcoming obtained from std::async just isn't moved from or certain to a reference, the destructor of your std::long term will block at the end of the complete expression until the asynchronous operation completes, fundamentally earning code like the next synchronous: