Rumored Buzz on sleep
Rumored Buzz on sleep
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The habits of the system is undefined if a mutex is ruined although continue to owned by any threads, or possibly a thread terminates while possessing a mutex. The mutex course satisfies all needs of Mutex and StandardLayoutType.
Offers a touch into the implementation to reschedule the execution of threads, permitting other threads to operate.
If policy is std::launch::async
The conventional library gives amenities to obtain values which might be returned and to catch exceptions which have been thrown by asynchronous duties (i.e. capabilities launched in independent threads). These values are communicated inside of a shared state, through which the asynchronous task may possibly generate its return worth or retail outlet an exception, and which may be examined, waited for, and in any other case manipulated by other threads that keep situations of std::foreseeable future or std::shared_future that reference that shared point out. Defined in header
three) Registers *this for your length of the contact, being notified if a stop request is designed on stoken's associated cease-point out; it is then akin to
Waits for the result to become offered. Blocks until eventually specified timeout_duration has elapsed How to get better sleep or the result gets to be offered, whichever will come first. The return worth identifies the condition of The end result.
The particular sleep time may be lengthier than requested since it is rounded up for the timer granularity and because of scheduling and context switching overhead.
Although notified less than lock, overload (one) will make no assures with regards to the point out with the affiliated predicate when returning resulting from timeout.
It makes it possible for some number of threads to wait (maybe having a timeout) for notification from A different thread that they could carry on. A situation variable is usually associated with a mutex. Outlined in header
This functionality may block for for a longer period than sleep_duration because of scheduling or source rivalry delays.
Be aware the destructors of std::futures received by usually means other than a get in touch with to std::async under no circumstances block. [edit] Case in point
std::start::deferred.
Blocks the execution of the current thread for at least till the TIME_UTC based period pointed to by period has elapsed.
Threads start execution immediately on development from the associated thread item (pending any OS scheduling delays), starting up at the very best-level functionality furnished being a constructor argument. The return value of the best-stage perform is ignored and when it terminates by throwing an exception, std::terminate is termed.
Should the std::foreseeable future acquired from std::async is not really moved from or certain to a reference, the destructor from the std::upcoming will block at the conclusion of the full expression right until the asynchronous Procedure completes, basically building code including the following synchronous: