5 Simple Techniques For sleep

5 Simple Techniques For sleep

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No synchronization is carried out on *this itself. Concurrently contacting be part of() on the exact same thread item from a number of threads constitutes a data race that ends in undefined conduct.

Presents a touch to the implementation to reschedule the execution of threads, allowing for other threads to run.

This overload could be utilized to disregard spurious awakenings even though awaiting a selected affliction to become true.

The very best-amount operate may converse its return price or an exception to the caller through std::promise 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 need to be modified while owning the mutex to properly publish the modification to your waiting thread.

atomic_compare_exchange_weakatomic_compare_exchange_weak_explicitatomic_compare_exchange_strongatomic_compare_exchange_strong_explicit

blocks The present thread until eventually the ailment variable is awakened or right up until specified time place has long been arrived at (general public member function) [edit] Native deal with

Regular Rationalization future_status::deferred The shared point out incorporates a deferred functionality applying lazy analysis, so The end result might be computed only when explicitly asked for future_status::All set The end result is prepared future_status::timeout The timeout has expired [edit] Exceptions

This overload may very well be applied to ignore spurious awakenings whilst waiting for a selected affliction to become accurate.

This functionality may well block for for a longer time than timeout_duration due to scheduling or useful resource competition delays.

Note the destructors of std::futures obtained by suggests aside from a call to std::async under no circumstances block. [edit] Instance

The operate template std::async operates the perform file asynchronously (potentially in the different thread which might be described as a A part of a thread pool) and returns a std::foreseeable future that will Stages of sleep sooner or later keep the results of that functionality get in touch with. one) Behaves as if (2) known as with policy staying std::start::async

A contacting thread owns a mutex within the time that it effectively phone calls possibly lock or try_lock till it calls unlock.

This overload may very well be utilized to ignore spurious awakenings when waiting for a particular affliction to become accurate.

When the std::potential received from std::async is not really moved from or bound to a reference, the destructor from the std::foreseeable future will block at the conclusion of the entire expression until the asynchronous operation completes, in essence building code which include the following synchronous: