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attributes.h
Go to the documentation of this file.00001 /* 00002 * attributes.h 00003 * Copyright (C) 2000-2002 Michel Lespinasse <walken@zoy.org> 00004 * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca> 00005 * 00006 * This file is part of mpeg2dec, a free MPEG-2 video stream decoder. 00007 * See http://libmpeg2.sourceforge.net/ for updates. 00008 * 00009 * mpeg2dec is free software; you can redistribute it and/or modify 00010 * it under the terms of the GNU General Public License as published by 00011 * the Free Software Foundation; either version 2 of the License, or 00012 * (at your option) any later version. 00013 * 00014 * mpeg2dec is distributed in the hope that it will be useful, 00015 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00016 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00017 * GNU General Public License for more details. 00018 * 00019 * You should have received a copy of the GNU General Public License 00020 * along with this program; if not, write to the Free Software 00021 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00022 */ 00023 00024 /* use gcc attribs to align critical data structures */ 00025 #ifdef ATTRIBUTE_ALIGNED_MAX 00026 #define ATTR_ALIGN(align) __attribute__ ((__aligned__ ((ATTRIBUTE_ALIGNED_MAX < align) ? ATTRIBUTE_ALIGNED_MAX : align))) 00027 #else 00028 #define ATTR_ALIGN(align) 00029 #endif 00030 00031 #ifdef HAVE_BUILTIN_EXPECT 00032 #define likely(x) __builtin_expect ((x) != 0, 1) 00033 #define unlikely(x) __builtin_expect ((x) != 0, 0) 00034 #else 00035 #define likely(x) (x) 00036 #define unlikely(x) (x) 00037 #endif
