如何创建一个包含两个condvar的互斥？

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

std::mutex mtx;
std::condition_variable cv1, cv2;
bool condition1 = false;
bool condition2 = false;

void thread1()
{
    std::unique_lock<std::mutex> lock(mtx);
    // 等待条件1满足
    cv1.wait(lock, []{ return condition1; });
    // 执行线程1的逻辑
    std::cout << "Thread 1 executed." << std::endl;
    // 通知条件2满足
    condition2 = true;
    cv2.notify_one();
}

void thread2()
{
    std::unique_lock<std::mutex> lock(mtx);
    // 执行线程2的逻辑
    std::cout << "Thread 2 executed." << std::endl;
    // 通知条件1满足
    condition1 = true;
    cv1.notify_one();
    // 等待条件2满足
    cv2.wait(lock, []{ return condition2; });
    // 执行线程2的其他逻辑
    std::cout << "Thread 2 continued." << std::endl;
}

int main()
{
    std::thread t1(thread1);
    std::thread t2(thread2);
    t1.join();
    t2.join();

    return 0;
}