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No synchronization is done on *this by itself. Concurrently calling sign up for() on the exact same thread object from numerous threads constitutes a data race that brings about undefined habits.
atomic_compare_exchange_weakatomic_compare_exchange_weak_explicitatomic_compare_exchange_strongatomic_compare_exchange_strong_explicit
This overload might be made use of to disregard spurious awakenings although waiting for a selected issue to become legitimate.
The regular endorses that the clock tied to sleep_time be applied, by which scenario adjustments on the clock may be taken into consideration. Thus, the length in the block is likely to be roughly than sleep_time - Clock::now() at some time of the call, dependant upon the course in the adjustment and whether it's honored through the implementation.
three) Registers *this for your length of the get in touch with, being notified if a quit request is built on stoken's related end-point out; it really is then reminiscent of
The highest-amount function could converse its return benefit or an exception into the caller via std::guarantee or by modifying shared variables (which can have to have synchronization, see std::mutex and std::atomic).
Even though the clock in use is std::chrono::steady_clock or Yet another monotonic clock, a technique clock adjustment may possibly induce a spurious wakeup.
Consistent Clarification future_status::deferred The shared condition includes a deferred operate making use of lazy evaluation, so the result will likely be computed only when explicitly requested future_status::ready The result is ready How sleep cycle works future_status::timeout The timeout has expired [edit] Exceptions
In almost any scenario, the operate also could watch for longer than right until immediately after abs_time has long been attained because of scheduling or useful resource rivalry delays.
Latches and barriers are thread coordination mechanisms that make it possible for any quantity of threads to dam right up until an expected range of threads arrive. A latch can not be reused, even though a barrier can be used consistently. Outlined in header
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.
std::start::deferred.
A contacting thread owns a mutex in the time that it productively phone calls either lock or try_lock right up until it phone calls unlock.
atomic_compare_exchange_weakatomic_compare_exchange_weak_explicitatomic_compare_exchange_strongatomic_compare_exchange_strong_explicit
Threads start off execution straight away upon construction in the linked thread item (pending any OS scheduling delays), setting up at the top-degree operate presented for a constructor argument. The return price of the top-level perform is dismissed and if it terminates by throwing an exception, std::terminate is termed.