std::experimental::flex_barrier:: arrive_and_wait
|
void
arrive_and_wait
(
)
;
|
(concurrency TS) | |
Blocks and arrives at the
flex_barrier
's synchronization point.
The behavior is undefined if the calling thread is not in the set of participating threads of this
flex_barrier
.
Calls to
arrive_and_wait
synchronizes with the start of the completion phase of the
flex_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 (provided that the function object for the completion phase did not return zero). It's not necessary to ensure that all blocked threads have exited
arrive_and_wait()
before a thread calls it again.
The completion phase executes the function object specified when the
flex_barrier
was constructed. If it returns -1, the set of participating threads is unchanged; otherwise, the set of participating threads is a new set with the size equal to the return value
N
, and consists of the next
N
threads to arrive at the synchronization point. If
N
==
0
, the
flex_barrier
can only be destroyed.
The initial set of participating threads for a
flex_barrier
constructed for
num_threads
threads is the first
num_threads
to arrive at its synchronization point.
Exceptions
Throws nothing.
See also
|
arrive at the synchronization point and remove the current thread from the set of participating threads
(public member function) |