1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* Copyright (c) 1984 AT&T */ 23 /* All Rights Reserved */ 24 25 #pragma ident "%Z%%M% %I% %E% SMI" 26 27 /* The following macros improve performance of the stdio by reducing the 28 number of calls to _bufsync and _wrtchk. _BUFSYNC has the same 29 effect as _bufsync, and _WRTCHK has the same effect as _wrtchk, 30 but often these functions have no effect, and in those cases the 31 macros avoid the expense of calling the functions. */ 32 33 #define _BUFSYNC(iop) if ((iop->_base + iop->_bufsiz) - iop->_ptr < \ 34 ( iop->_cnt < 0 ? 0 : iop->_cnt ) ) \ 35 _bufsync(iop) 36 #define _WRTCHK(iop) ((((iop->_flag & (_IOWRT | _IOEOF)) != _IOWRT) \ 37 || (iop->_base == NULL) \ 38 || (iop->_ptr == iop->_base && iop->_cnt == 0 \ 39 && !(iop->_flag & (_IONBF | _IOLBF)))) \ 40 ? _wrtchk(iop) : 0 ) 41