Linux 和 gcc 4 中的 C++ 新运算符线程安全

Linux和gcc 4中的C++新运算符线程安全

cpp
#include 
#include 
#include 
#include 
std::atomic count(0);
std::mutex mtx;
void increment()
{
    for (int i = 0; i < 100000; i++)
    {
        count++;
    }
}
void incrementWithMutex()
{
    for (int i = 0; i < 100000; i++)
    {
        std::lock_guard lock(mtx);
        count++;
    }
}
int main()
{
    std::thread t1(increment);
    std::thread t2(increment);
    t1.join();
    t2.join();
    std::cout << "Count (without mutex): " << count << std::endl;
    std::thread t3(incrementWithMutex);
    std::thread t4(incrementWithMutex);
    t3.join();
    t4.join();
    std::cout << "Count (with mutex): " << count << std::endl;
    return 0;
}