map用索引作下标之后,再插值时报错.

DBMgr* ConnPool::GetConn()                                                      
{                                                                               
        pthread_t id = pthread_self();                                          
        //unsigned long  id = pthread_self();                                   
        ConnMap::iterator it = conn_map_.find(id);                              
        if ( it == conn_map_.end()) {                                           
                                                                                
                                                                                
        //if (!conn_map_[id]) {                                                 
                DBMgr* dbmgr = new DBMgr();                                     
                dbmgr->Init(ip_, port_, name_, user_, password_);               
                std::pair<map<pthread_t,DBMgr*>::iterator, bool > ret =         
                //std::pair<map<unsigned long ,DBMgr*>::iterator, bool > ret =  
                conn_map_.insert(make_pair<pthread_t, DBMgr*>(id, dbmgr));      
                //conn_map_.insert(make_pair<unsigned long, DBMgr*>(id, dbmgr));
                if (!ret.second) {                                              
                        printf("insert err\n");                                 
                }                                                               
        //}                                                                     
        }                                                                       
        return conn_map_[id];                                                   
}

发现之前只要用到 conn_map_[id]这样的用数组索引作为下标的取操作,再插入的时候就会出问题....

具体什么原因可能要看代码才知道了,,,