Method enqueue

cactus/kernel/kernel_utils.h:339–356

        template<typename F>
        auto enqueue(F&& f) -> std::future<decltype(f())> {
            using return_type = decltype(f());

            auto task = std::make_shared<std::packaged_task<return_type()>>(
                std::forward<F>(f)
            );

            std::future<return_type> res = task->get_future();

            {
                std::lock_guard<std::mutex> lock(mutex);
                pending_tasks.fetch_add(1, std::memory_order_relaxed);
                tasks.emplace_back([task](){ (*task)(); });
            }
            work_available.notify_one();

            return res;
        }

        template<typename F>
        void enqueue_batch(size_t total_work, F task_func) {