Method choose_one_group

src/bthread/task_control.cpp:320–329

}

TaskGroup* TaskControl::choose_one_group(bthread_tag_t tag) {
    CHECK(tag >= BTHREAD_TAG_DEFAULT && tag < FLAGS_task_group_ntags);
    auto& groups = tag_group(tag);
    const auto ngroup = tag_ngroup(tag).load(butil::memory_order_acquire);
    if (ngroup != 0) {
        return groups[butil::fast_rand_less_than(ngroup)];
    }
    CHECK(false) << "Impossible: ngroup is 0";
    return NULL;
}

int TaskControl::parse_cpuset(std::string value, std::vector<unsigned>& cpus) {
    static std::regex r("(\\d+-)?(\\d+)(,(\\d+-)?(\\d+))*");