func: static AioHandler *find_aio_handler(AioContext *ctx, int fd)
  
  {
  
      AioHandler *node;
  
  
  
      QLIST_FOREACH(node, &ctx->aio_handlers, node) {
  
          if (node->pfd.fd == fd)
  
              if (!node->deleted)
  
                  return node;
  
      }
  
  
  
      return NULL;
  
  }
  