+private:
+ /** Wrap a (possibly non-copyable) single-use task into a `std::function` */
+ template<class F, class... Args>
+ class Task {
+ public:
+ Task(F&& code, Args&&... args) :
+ code_(std::forward<F>(code)),
+ args_(std::forward<Args>(args)...)
+ {}
+ void operator()()
+ {
+ if (done_.test_and_set())
+ throw std::logic_error("Actor task already executed");
+ simgrid::xbt::apply(std::move(code_), std::move(args_));
+ }
+ private:
+ std::atomic_flag done_ = ATOMIC_FLAG_INIT;
+ F code_;
+ std::tuple<Args...> args_;
+ };
+ /** Wrap a (possibly non-copyable) single-use task into a `std::function` */
+ template<class F, class... Args>
+ static std::function<void()> wrap_task(F f, Args... args)
+ {
+ std::shared_ptr<Task<F, Args...>> task(
+ new Task<F, Args...>(std::move(f), std::move(args)...));
+ return [=] {
+ (*task)();
+ };
+ }