C++中的多线程编程最佳实践是什么？

#include <iostream>
#include <thread>

void threadFunction() {
    std::cout << "Hello from thread!" << std::endl;
}

int main() {
    std::thread t(threadFunction);
    t.join();
    return 0;
}

#include <iostream>
#include <thread>
#include <mutex>

std::mutex mtx;
int sharedData = 0;

void incrementData() {
    for (int i = 0; i < 100000; ++i) {
        std::lock_guard<std::mutex> lock(mtx);
        ++sharedData;
    }
}

int main() {
    std::thread t1(incrementData);
    std::thread t2(incrementData);

    t1.join();
    t2.join();

    std::cout << "Final value of sharedData: " << sharedData << std::endl;
    return 0;
}

#include <iostream>
#include <thread>
#include <mutex>
#include <condition_variable>

std::mutex mtx;
std::condition_variable cv;
bool ready = false;

void printId(int id) {
    std::unique_lock<std::mutex> lck(mtx);
    while (!ready) cv.wait(lck);
    std::cout << "Thread " << id << std::endl;
}

void go() {
    std::unique_lock<std::mutex> lck(mtx);
    ready = true;
    cv.notify_all();
}

int main() {
    std::thread threads[10];
    for (int i = 0; i < 10; ++i) {
        threads[i] = std::thread(printId, i);
    }

    std::cout << "10 threads ready to race..." << std::endl;
    go();

    for (auto& th : threads) th.join();

    return 0;
}

#include <iostream>
#include <vector>
#include <thread>
#include <queue>
#include <mutex>
#include <condition_variable>
#include <functional>

class ThreadPool {
public:
    ThreadPool(size_t threads) : stop(false) {
        for (size_t i = 0; i < threads; ++i) {
            workers.emplace_back([this] {
                while (true) {
                    std::function<void()> task;
                    {
                        std::unique_lock<std::mutex> lock(queue_mutex);
                        condition.wait(lock, [this] { return stop || !tasks.empty(); });
                        if (stop && tasks.empty()) return;
                        task = std::move(tasks.front());
                        tasks.pop();
                    }
                    task();
                }
            });
        }
    }

    template<class F>
    void enqueue(F&& f) {
        {
            std::unique_lock<std::mutex> lock(queue_mutex);
            if (stop) throw std::runtime_error("enqueue on stopped ThreadPool");
            tasks.emplace(std::forward<F>(f));
        }
        condition.notify_one();
    }

    ~ThreadPool() {
        {
            std::unique_lock<std::mutex> lock(queue_mutex);
            stop = true;
        }
        condition.notify_all();
        for (std::thread &worker : workers) worker.join();
    }

private:
    std::vector<std::thread> workers;
    std::queue<std::function<void()>> tasks;
    std::mutex queue_mutex;
    std::condition_variable condition;
    bool stop;
};

int main() {
    ThreadPool pool(4);
    for (int i = 0; i < 8; ++i) {
        pool.enqueue([i] {
            std::cout << "Task " << i << " executed by thread " << std::this_thread::get_id() << std::endl;
        });
    }
    return 0;
}