The Single Best Strategy To Use For sleep
The Single Best Strategy To Use For sleep
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atomic_compare_exchange_weakatomic_compare_exchange_weak_explicitatomic_compare_exchange_strongatomic_compare_exchange_strong_explicit
atomic_compare_exchange_weakatomic_compare_exchange_weak_explicitatomic_compare_exchange_strongatomic_compare_exchange_strong_explicit
This overload might be utilised to disregard spurious awakenings though awaiting a particular affliction to be true.
The very best-degree perform might talk its return value or an exception towards the caller by way of std::promise or by modifying shared variables (which may require synchronization, see std::mutex and std::atomic).
Even if the shared variable is atomic, it needs to be modified whilst possessing the mutex to properly publish the modification to your waiting around thread.
The call to std::async synchronizes with the decision to file, and the completion of f is sequenced prior to making the shared condition All set.
The typical endorses which the clock tied to abs_time be utilized to evaluate time; that clock is not really needed to certainly be a monotonic clock. There are no guarantees regarding the behavior of this perform In the event the clock is modified discontinuously, but the present implementations How sleep cycle works 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 program clock, but not for the consumer-offered Clock.
The standard endorses that a gentle clock is utilized to evaluate the length. If an implementation employs a technique clock as an alternative, the wait around time might also be sensitive to clock changes.
The operate also could block till just after sleep_time has actually been achieved because of process scheduling or useful resource competition delays.
atomic_compare_exchange_weakatomic_compare_exchange_weak_explicitatomic_compare_exchange_strongatomic_compare_exchange_strong_explicit
The class thread signifies an individual thread of execution. Threads allow for several capabilities 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 eventually the TIME_UTC based length pointed to by period has elapsed.
This enables the purpose to examine if quit has become 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 earning code such as the following synchronous: