//获取全局唯一ID

//server_id为服务的id,因当同一个服务部署在多个服务器上时，需要区别

unsigned long long GetUniqueID(unsigned int server_id)

{

    static unsigned long long seq_id = ;

    unsigned long long seq = seq_msg_id++ ;

    seq = (seq<<);

    seq = (seq>>);

    unsigned long long tag = ((unsigned long long)server_id<<);

    seq = (seq | tag) ;

    return seq ;

}

/**

 获取全局唯一ID,且ID为奇数

 */

unsigned long long GetOddID(unsigned int server_id)

{

    unsigned long long id = GetUniqueID(server_id);

    while (true)

    {

        if ((id & 0x01) == 0x01)

        {

            return id;

        }

        else

        {

            id = GetUniqueID(server_id);

        }

    }

}

//利用MD5库提供的64位哈希函数，来将字符串生成相应的hash值

//从而可得到经md5转化后的报文摘要

//数据库的UUID