test_delegate_observer.cpp

#include "test_delegate_observer.h"
#include <future>
#include <thread>

static DelegateObserver *g_mainWindow = nullptr;

DelegateObserver::DelegateObserver() {}

DelegateObserver *DelegateObserver::instance()
{
    if (!g_mainWindow) g_mainWindow = new DelegateObserver();

    return g_mainWindow;
    std::atomic<int> x;
}

void DelegateObserver::push_event()
{
    auto fun = [&](std::promise<std::vector<int>> *pro) {
        std::vector<int> element;
        srand((int) time(NULL));
        for (int i = 0; i < 10; ++i) { element.push_back(rand()); }

        sort_element(element);
        pro->set_value(element);
    };

    std::promise<std::vector<int> > pro;
    std::future<std::vector<int> > fut = pro.get_future();

    std::thread thread(fun, &pro);
    thread.join();

    for (auto &e: fut.get()) { std::cout << e << std::endl; }
}