sleep Fundamentals Explained
The returned value of overload (three) signifies whether pred evaluated to genuine, regardless of whether there was a stop requested or not.
atomic_compare_exchange_weakatomic_compare_exchange_weak_explicitatomic_compare_exchange_strongatomic_compare_exchange_strong_explicit
a simply call to the waiting operate on an asynchronous return object that shares the shared state designed by this std::async connect with blocks until the connected thread has concluded, just as if joined, or else time out; and
remaining - pointer to the thing to put the remaining time on interruption. Could possibly be NULL, where situation it really is dismissed
Even when the shared variable is atomic, it have to be modified while possessing the mutex to properly publish the modification for the ready thread.
The top-degree purpose might converse its return benefit or an exception for the caller by way of std::assure or by modifying shared variables (which may demand synchronization, see std::mutex and std::atomic).
The standard recommends that the clock tied to abs_time be used to measure time; that clock just isn't necessary to become a monotonic clock. There won't be How to get better sleep 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-delivered Clock.
Whether or not notified beneath lock, overload (1) helps make no guarantees concerning the state in the connected predicate when returning as a result of 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 result of a contact to std::async that utilised lazy analysis, this purpose returns promptly without the need of waiting.
A semaphore is a lightweight synchronization primitive used to constrain concurrent usage of a shared useful resource. When both would suffice, a semaphore may be more economical than the usual problem variable. Defined in header
A calling thread owns a mutex within the time that it properly calls either lock or try_lock until eventually it calls unlock.
This allows the purpose to check if end continues to be asked for throughout its execution, and return if it's got.
std::condition_variable can be a synchronization primitive applied which has a std::mutex to block one or more threads until finally One more thread both of those modifies a shared variable (the condition) and notifies the std::condition_variable.