Function add

test/bthread_execution_queue_unittest.cpp:48–56

};

int add(void* meta, bthread::TaskIterator<LongIntTask> &iter) {
    stopped = iter.is_queue_stopped();
    int64_t* result = (int64_t*)meta;
    for (; iter; ++iter) {
        *result += iter->value;
        if (iter->event) { iter->event->signal(); }
    }
    return 0;
}

void test_single_thread(bool use_pthread) {
    int64_t result = 0;