Getting My sleep To Work
Getting My sleep To Work
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No synchronization is executed on *this alone. Concurrently calling be a part of() on the same thread item from many threads constitutes an information race that results in undefined actions.
atomic_compare_exchange_weakatomic_compare_exchange_weak_explicitatomic_compare_exchange_strongatomic_compare_exchange_strong_explicit
This overload may very well be utilised to ignore spurious awakenings even though waiting for a certain issue to become legitimate.
The highest-amount function might converse its return value or an exception to your caller by way of std::assure or by modifying shared variables (which may have to have synchronization, see std::mutex and std::atomic).
Even if the shared variable is atomic, it has to be modified even though proudly owning the mutex to correctly publish the modification for the waiting around thread.
The decision to std::async synchronizes with the decision to file, and also the completion of f is sequenced prior to making the shared point out Completely ready.
The common suggests the clock tied to abs_time be accustomed to evaluate time; that clock will not be needed to certainly be a monotonic clock. There isn't any assures concerning the actions of the perform When the clock is modified discontinuously, but the present implementations change abs_time from Clock to std::chrono::system_clock and delegate to POSIX pthread_cond_timedwait so the wait around honors adjustments for the technique clock, but not for the consumer-presented Clock.
Even when notified below lock, overload (1) makes no guarantees about the state of the involved predicate when returning as a consequence of timeout.
The functionality also may well block right up until right after sleep_time has been arrived at on account of method scheduling or resource Tips to improve your sleep routine rivalry delays.
atomic_compare_exchange_weakatomic_compare_exchange_weak_explicitatomic_compare_exchange_strongatomic_compare_exchange_strong_explicit
The class thread signifies a single thread of execution. Threads let multiple features to execute concurrently.
atomic_compare_exchange_weakatomic_compare_exchange_weak_explicitatomic_compare_exchange_strongatomic_compare_exchange_strong_explicit
Blocks the execution of the present thread for at least until finally the TIME_UTC centered duration pointed to by length has elapsed.
This enables the purpose to examine if quit is asked for all through its execution, and return if it has.
In the event the std::foreseeable future attained from std::async is not moved from or bound to a reference, the destructor in the std::long run will block at the conclusion of the full expression till the asynchronous operation completes, in essence building code such as the following synchronous: