5 Essential Elements For sleep
5 Essential Elements For sleep
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atomic_compare_exchange_weakatomic_compare_exchange_weak_explicitatomic_compare_exchange_strongatomic_compare_exchange_strong_explicit
A situation variable is usually a synchronization primitive that allows many threads to communicate with one another.
This overload might be made use of to ignore spurious awakenings when looking forward to a selected problem to be accurate.
The very best-amount operate could talk its return benefit or an exception towards the caller by using std::promise or by modifying shared variables (which can need synchronization, see std::mutex and std::atomic).
Even if the shared variable is atomic, it must be modified although possessing the mutex to properly publish the modification towards the waiting around thread.
The decision to std::async synchronizes with the decision to file, and the completion of f is sequenced prior to making the shared state Prepared.
The common suggests 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 isn't any ensures regarding the habits of this functionality If your clock is modified discontinuously, but the prevailing implementations transform abs_time from Clock to std::chrono::system_clock and delegate to POSIX pthread_cond_timedwait so that the hold out honors adjustments to the procedure clock, although not to the user-offered Clock.
Even when notified below lock, overload (1) helps make no ensures with regards to the condition with the affiliated predicate when returning as a consequence of timeout.
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
If the longer term is the result of a simply call to std::async that utilised lazy analysis, this functionality returns immediately with out waiting around.
A length contains a Stages of sleep span of your time, described as some range of ticks of a while device. For example, "42 seconds" might be represented by a period consisting of forty two ticks of the one-2nd time unit. Outlined in header Described in namespace std::chrono
Blocks the execution of the current thread for at least until eventually the TIME_UTC based length pointed to by period has elapsed.
This overload might be utilised to disregard spurious awakenings whilst expecting a selected situation to be true.
Threads commence execution quickly on design from the connected thread object (pending any OS scheduling delays), starting off at the best-amount function supplied like a constructor argument. The return worth of the highest-stage functionality is disregarded and if it terminates by throwing an exception, std::terminate is known as.