Considerations To Know About sleep

Considerations To Know About sleep

Blog Article

No synchronization is executed on *this itself. Concurrently calling be part of() on a similar thread object from numerous threads constitutes an information race that leads to undefined habits.

A ailment variable is really a synchronization primitive that permits a number of threads to talk to one another.

The sleep may resume before if a sign that isn't dismissed is received. In such circumstance, if remaining will not be NULL, the remaining time length is stored into the object pointed to by remaining.

The common library supplies amenities to obtain values that are returned also to catch exceptions which are thrown by asynchronous jobs (i.e. functions released in independent threads). These values are communicated inside of a shared condition, wherein the asynchronous process may generate its return price or retailer an exception, and which can be examined, waited for, and usually manipulated by other threads that hold scenarios of std::long run or std::shared_future that reference that shared state. Described in header

Presents a hint into the implementation to reschedule the execution of threads, making it possible for other threads to run.

Waits for the result to become available. Blocks right up until specified timeout_duration has elapsed or The end result turns into out there, whichever comes initially. The return value identifies the condition of The end result.

The typical endorses the clock tied to abs_time be accustomed to measure time; that clock just isn't necessary to become a monotonic clock. There won't be any assures concerning the actions of the purpose If your clock is modified discontinuously, but the present implementations 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 towards the user-provided Clock.

The category jthread represents a single thread of execution. It's got precisely the same basic behavior as std::thread, apart from that jthread routinely rejoins on destruction, and may be cancelled/stopped in certain predicaments.

In almost any case, the functionality also could watch for for a longer period than until finally after abs_time has actually been attained as a consequence of scheduling or source rivalry delays.

This perform may perhaps block for for a longer time than timeout_duration resulting from scheduling or Stages of sleep resource competition delays.

period and remaining may well issue at a similar item, which simplifies re-running the function after a signal.

A semaphore is a light-weight synchronization primitive accustomed to constrain concurrent access to a shared useful resource. When both would suffice, a semaphore could be more economical than a situation variable. Described in header

atomic_compare_exchange_weakatomic_compare_exchange_weak_explicitatomic_compare_exchange_strongatomic_compare_exchange_strong_explicit

Threads begin execution quickly upon development from the affiliated thread object (pending any OS scheduling delays), starting off at the very best-amount operate delivered like a constructor argument. The return price of the very best-amount perform is dismissed and when it terminates by throwing an exception, std::terminate is known as.

If the perform f returns a value or throws an exception, it really is stored inside the shared condition available throughout the std::foreseeable future that std::async returns on the caller. [edit] Deferred invocation