c/c++获取uuid

c/c++标准库中没有自带的uuid工具函数/类，可以使用三方库libuuid，boost，或者手工实现，如下：

[zjh@hs-10-20-xxx lib]$ sudo yum install libuuid-devel
[sudo] password for zjh: 
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Package libuuid-devel-2.23.2-65.el7_9.1.x86_64 already installed and latest version
Nothing to do

测试程序

// boost版本异常慢
void test_uuid_perf()
{
    // boost::uuids::uuid a_uuid;
    vector<string> myvertor;
    uuid_t uu;
    char uuid_str[37];
    
    struct timeval start, stop, diff;
    gettimeofday(&start, 0);   //开始计时
    for (int i=0;i<100000;i++)
    {
        // a_uuid = boost::uuids::random_generator()();
        // myvertor.emplace_back(boost::uuids::to_string(a_uuid));
        uuid_generate(uu);
    
        uuid_unparse_lower(uu, uuid_str);
        string str1(uuid_str);
        myvertor.emplace_back(str1);

    }
    cout << myvertor[10] << endl;
    gettimeofday(&stop, 0);   //结束计时
    timeval_subtract(&diff, &start, &stop);
    printf("总计用时:%d秒%d微秒\n",diff.tv_sec, diff.tv_usec);  // boost版本，10万个uuid 17秒多; uuid版本, 10万个0.5秒，35倍
    printf("完成");
}

https://www.cnblogs.com/nanfei/p/11742249.html libuuid，性能最佳，是手工和boost的几十倍

https://www.jianshu.com/p/33639aee1ffa，https://blog.51cto.com/u_14508933/5565901 手工编写

https://blog.csdn.net/chiefarbiter/article/details/90201581 boost