NAME¶

std::experimental::barrier::arrive_and_wait - std::experimental::barrier::arrive_and_wait

Synopsis¶

void arrive_and_wait(); (concurrency TS)

Blocks and arrive at the barrier's synchronization point.

The behavior is undefined if the calling thread is not in the set of participating
threads of this barrier.

Calls to arrive_and_wait synchronizes with the start of the completion phase of the
barrier. The completion of the completion phase synchronizes with the return from
the call.

Calls to arrive_and_drop and arrive_and_wait never introduce data races with
themselves or each other.

Notes¶

It is safe for a thread to call either arrive_and_wait() or arrive_and_drop()
immediately on return from this call. It's not necessary to ensure that all blocked
threads have exited arrive_and_wait() before a thread calls it again.

The set of participating threads for a barrier constructed for num_threads threads
is the first num_threads to arrive at its synchronization point. This set does not
change from cycle to cycle, except for threads removed from the set due to
arrive_and_drop() calls.

Exceptions¶

Throws nothing.

See also¶

arrive at the synchronization point and remove the current thread
arrive_and_drop from the set of participating threads
(public member function)