SimpleThreadPool

A Simple C++ thread pool implement.

a paralleled transform & for_each algorithm is provided

ThreadPool pool(4);
std::vector<int> nums = {1, 2, 3, 4, 5, 6, 7, 8, 9};

// output nums
pool.for_each(nums.begin(), nums.end(), [](int n) {
	std::this_thread::sleep_for(std::chrono::seconds(1));
	std::cout << n << std::endl;
});

// convert nums to string
auto to_str = [](int n) -> std::string { return boost::lexical_cast<std::string>(n); };
pool.transform(nums.begin(), nums.end(), std::back_inserter(real), to_str);


int n = 1;
std::future<int> r1 = pool.post([&]{
    return n;
});
std::this_thread::sleep_for(std::chrono::microseconds(100));
std::future<int> r2 = pool.post([&] {
        std::this_thread::sleep_for(std::chrono::microseconds(100));
    return n;
});
n = 2;
ASSERT_EQ(1, r1.get());
ASSERT_EQ(2, r2.get());