The Definitive Guide to sleep

The Definitive Guide to sleep

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No synchronization is performed on *this alone. Concurrently calling join() on the same thread item from several threads constitutes a data race that ends in undefined conduct.

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

The sleep may resume earlier if a sign that's not disregarded is received. In such case, if remaining isn't NULL, the remaining time duration is saved into the article pointed to by remaining.

remaining - pointer to the article To place the remaining time on interruption. Can be NULL, where scenario it can be overlooked

Mutual exclusion algorithms protect against several threads from at the same time accessing shared assets. This helps prevent knowledge races and offers guidance for synchronization among threads. Described in header

The best-level operate may possibly connect its return value or an exception towards the caller through std::guarantee or by modifying shared variables (which may require synchronization, see std::mutex and std::atomic).

The actual sleep time may very well be for a longer period than requested because it is rounded up into the timer granularity and since of scheduling and context switching overhead.

The class jthread signifies a single thread of execution. It's a similar common habits as std::thread, except that jthread instantly rejoins on destruction, and will be cancelled/stopped in particular conditions.

In any situation, the operate also may perhaps watch for more time than right until following abs_time has become arrived at because of scheduling or source rivalry delays.

This operate may possibly block for more time than timeout_duration resulting from scheduling or useful resource rivalry delays.

length and remaining could level at the identical object, which simplifies re-operating the perform after a signal.

A semaphore is a light-weight synchronization primitive accustomed to constrain concurrent usage of a shared useful resource. When both would suffice, a semaphore might be a lot more effective than a condition variable. Defined in header

atomic_compare_exchange_weakatomic_compare_exchange_weak_explicitatomic_compare_exchange_strongatomic_compare_exchange_strong_explicit

This overload may very well be applied to ignore spurious awakenings though looking ahead to a Stages of sleep particular ailment to become legitimate.

In case the std::potential acquired from std::async is not moved from or sure to a reference, the destructor in the std::future will block at the conclusion of the total expression until the asynchronous operation completes, effectively generating code like the subsequent synchronous: