Arrive at the barrier's synchronization point and remove the current thread from the set of participating threads. It is unspecified whether this function blocks until the completion phase has ended.
The behavior is undefined if the calling thread is not in the set of participating threads of this barrier.
arrive_and_drop synchronizes with the start of the completion phase of the barrier. If the call blocks, then the completion of the completion phase synchronizes with the return from the call.
arrive_and_wait never introduce data races with themselves or each other.
If every participating thread calls
arrive_and_drop(), the barrier can only be destroyed.
After a thread calls
arrive_and_drop() on a barrier, it is no longer a member of its set of participating threads and hence can no longer call either
arrive_and_wait() on the same barrier.
 See also
| arrive at the synchronization point and block |
(public member function)