尝试通过共享指针使用变量时发生读访问冲突

#include <iostream>
#include <memory>
#include <mutex>

std::shared_ptr<int> sharedVariable(new int(0));
std::mutex mtx;

void readOperation()
{
    std::shared_ptr<int> localCopy;
    {
        std::lock_guard<std::mutex> lock(mtx);
        localCopy = sharedVariable; // 读取共享变量
    }
    // 使用 localCopy 进行读操作
    std::cout << "Read value: " << *localCopy << std::endl;
}

void writeOperation()
{
    std::lock_guard<std::mutex> lock(mtx);
    // 修改共享变量
    *sharedVariable += 1;
    std::cout << "Write value: " << *sharedVariable << std::endl;
}

int main()
{
    std::thread t1(readOperation);
    std::thread t2(writeOperation);
    t1.join();
    t2.join();
    return 0;
}