blocking_region_begin  118 thread.c       static inline int blocking_region_begin(rb_thread_t *th, struct rb_blocking_region_buffer *region,
blocking_region_begin  158 thread.c           if (blocking_region_begin(__th, &__region, (ubf), (ubfarg), fail_if_interrupted) || \
blocking_region_begin 1501 thread.c           blocking_region_begin(th, brb, prev_unblock.func, prev_unblock.arg, FALSE);