void GOMP_barrier_ext (int kind) void GOMP_barrier_cancel_ext (int kind)
kind should be GOMP_BARRIER_EXPLICIT. Other values are for implicit
barriers resulting from parallel or work-sharing constructs.
GOMP_barrier and GOMP_barrier_cancel are kept for backward
compatibility but new code only calls the _ext variants.
GOMP_barrier_cancel_ext should be used when the barrier happens within
a cancellable construct.