rem: void Close() { if (fFD >= 0) { if (fKernel) _kern_close(fFD); else _user_close(fFD); fFD = -1; } }
add: FDCloser::Close() { if (fFD >= 0) _kern_close(fFD); fFD = -1; }
context: 	void Close()	{		if (fFD >= 0) {			if (fKernel)				_kern_close(fFD);			else				_user_close(fFD);			fFD = -1;		}	}