5 Simple Techniques For sleep

5 Simple Techniques For sleep

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The returned value of overload (3) suggests irrespective of whether pred evaluated to true, regardless of whether there was a end asked for or not.

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std::launch::deferred or has further bits set, it is going to slide again to deferred invocation or perhaps the implementation-described procedures In such cases.

The highest-degree perform might communicate its return benefit or an exception to your caller by means of std::guarantee or by modifying shared variables (which may require synchronization, see std::mutex and std::atomic).

Although the shared variable is atomic, it has to be modified while possessing the mutex to correctly publish the modification to your ready thread.

The top-stage function may well communicate its return price or an exception for the caller by using std::guarantee or by modifying shared variables (which may need synchronization, see std::mutex and std::atomic).

The common recommends that the clock tied to abs_time be used to measure time; that clock isn't needed to become a monotonic clock. There won't be any ensures concerning the habits of the purpose if the clock is adjusted discontinuously, but the existing implementations convert abs_time from Clock to std::chrono::system_clock and delegate to POSIX pthread_cond_timedwait so that the wait honors adjustments on the procedure clock, although not to your person-delivered Clock.

Regardless of whether notified underneath lock, overload (one) can make no ensures with regards to the state of the affiliated predicate when returning as a consequence of timeout.

The purpose also may possibly block until finally after sleep_time has long been achieved as a result of procedure scheduling or source contention delays.

Latches and boundaries are thread coordination mechanisms that enable any number of threads to dam until finally an expected amount of threads arrive. A latch can not be reused, although a barrier can be used regularly. Defined in header

The category thread represents one thread of execution. Threads let a number of functions to Stages of sleep execute concurrently.

A period includes a span of time, defined as some amount of ticks of some time device. For example, "forty two seconds" could be represented by a length consisting of forty two ticks of a one-2nd time device. Outlined in header Described in namespace std::chrono

Blocks the execution of the current thread for a minimum of until the TIME_UTC based mostly period pointed to by duration has elapsed.

This overload can be employed to disregard spurious awakenings though looking forward to a certain condition to become real.

The result or exception is positioned while in the shared point out associated with the returned std::long term and only then it really is manufactured All set. All even further accesses to a similar std::future will return the result instantly.