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No synchronization is done on *this itself. Concurrently calling sign up for() on a similar thread object from numerous threads constitutes a knowledge race that ends in undefined behavior.
atomic_compare_exchange_weakatomic_compare_exchange_weak_explicitatomic_compare_exchange_strongatomic_compare_exchange_strong_explicit
std::launch::deferred or has additional bits established, it is going to fall back again to deferred invocation or the implementation-outlined insurance policies In such cases.
remaining - pointer to the thing To place the remaining time on interruption. Can be NULL, during which case it is actually overlooked
Even though the shared variable is atomic, it need to be modified whilst possessing the mutex to correctly publish the modification for the ready thread.
The best-amount function could converse its return benefit or an exception to the caller by way of std::guarantee or by modifying shared variables (which can have to have synchronization, see std::mutex and std::atomic).
The typical endorses which the clock tied to abs_time be utilized to evaluate time; that clock is not really needed to be a monotonic clock. There isn't any assures concerning the habits of this perform if the clock is adjusted discontinuously, but the prevailing implementations transform abs_time from Clock to std::chrono::system_clock and delegate to POSIX pthread_cond_timedwait so the wait around honors adjustments to the procedure clock, although not to your consumer-offered Clock.
Even when notified under lock, overload (1) makes no guarantees about the point out of your involved 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 future is the results of a contact to std::async that applied lazy evaluation, this purpose returns instantly without the need of waiting around.
atomic_compare_exchange_weakatomic_compare_exchange_weak_explicitatomic_compare_exchange_strongatomic_compare_exchange_strong_explicit
Blocks the execution of Tips to improve your sleep routine the present thread for at least until finally the TIME_UTC dependent duration pointed to by length has elapsed.
This allows the perform to check if halt has long been requested in the course of its execution, and return if it's.
Should the std::future acquired from std::async is just not moved from or sure to a reference, the destructor of your std::long term will block at the end of the complete expression till the asynchronous operation completes, in essence building code such as the following synchronous: