void WorkerThread::ConnEventCB(bufferevent *bev, short int events,
void * ctx)
{
ConnItem * pitem = static_cast<ConnItem *>(ctx);
WorkerThread * pwt = static_cast<WorkerThread*>(pitem->pthis);
if (pitem->log_fd != -1) //连接意外关闭，关闭写日志文件描述符
close(pitem->log_fd);
pwt->DeleteConnItem(*pitem); //从线程队列中删除连接对象
bufferevent_free(bev);
msghandler->sessionClosed(pitem);
}
