Detailed Notes on sleep
Detailed Notes on sleep
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No synchronization is performed on *this itself. Concurrently contacting be part of() on the identical thread object from multiple threads constitutes a data race that results in undefined actions.
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std::start::deferred or has further bits set, it will eventually tumble back again to deferred invocation or the implementation-described procedures In this instance.
remaining - pointer to the object To place the remaining time on interruption. Might be NULL, where situation it is actually dismissed
Although the shared variable is atomic, it should be modified while owning the mutex to properly publish the modification on the ready thread.
The highest-degree perform may perhaps converse its return worth or an exception to the caller by using std::guarantee or by modifying shared variables (which may require synchronization, see std::mutex and std::atomic).
The common recommends that the clock tied to abs_time be used to measure time; that clock will not be necessary to become a monotonic clock. There won't be any assures concerning the actions of the functionality Should the clock is altered discontinuously, but the prevailing implementations transform abs_time from Clock to std::chrono::system_clock and delegate to POSIX pthread_cond_timedwait so which the hold out honors changes into the procedure clock, although not into the person-provided Clock.
Even if notified less than lock, overload (one) will make no assures with regard to the point out with the affiliated predicate when returning resulting from timeout.
atomic_compare_exchange_weakatomic_compare_exchange_weak_explicitatomic_compare_exchange_strongatomic_compare_exchange_strong_explicit
atomic_compare_exchange_weakatomic_compare_exchange_weak_explicitatomic_compare_exchange_strongatomic_compare_exchange_strong_explicit
If the future is the results of a call to std::async that utilised lazy evaluation, this functionality returns instantly devoid of waiting.
A semaphore is a lightweight synchronization primitive utilized to constrain concurrent access to a shared source. When possibly would suffice, a semaphore may be far more economical than a issue variable. Outlined in header
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This enables the functionality to check if quit has become asked for all through its execution, and return if it has.
In the event the How to get better sleep std::foreseeable future attained from std::async isn't moved from or certain to a reference, the destructor with the std::future will block at the end of the complete expression until eventually the asynchronous operation completes, in essence building code including the following synchronous: