1 std::lock_guard 的特点

1，异常安全
2，不可复制和不可移动, 这确保了对mutex锁的独占性,避免锁状态不一致
3, 单一责任, 仅用于管理mutex锁的锁定和解锁,不支持其他锁定策略

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

using namespace std;
int myCount = 0;
int myCount1 = 0;
mutex myMutex;

void own() {
    {
        lock_guard<mutex> lock(myMutex);
        for(size_t i = 0; i<100000; i++) {
            myCount++;
        }
    }
    for(size_t i = 0; i<100000; i++) {
        myCount1++;
    }
}

int main() {
    std::cout << "Hello, World!" << std::endl;
    vector<thread> myBox;
    for (int i = 0; i < 10; i++) {
        myBox.emplace_back(own);
    }
    for(thread& t:myBox) {
        t.join();
    }
    printf("myCount: %d\n", myCount);
    printf("myCount1: %d", myCount1);
    return 0;
}