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The LXR Cross Referencer for SOS

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Differences between /sos/macros.h (Article 4) and /sos/macros.h (Article 7.5)


001 /* Copyright (C) 2004  The KOS Team               001 /* Copyright (C) 2004  The KOS Team
002                                                   002 
003    This program is free software; you can redi    003    This program is free software; you can redistribute it and/or
004    modify it under the terms of the GNU Genera    004    modify it under the terms of the GNU General Public License
005    as published by the Free Software Foundatio    005    as published by the Free Software Foundation; either version 2
006    of the License, or (at your option) any lat    006    of the License, or (at your option) any later version.
007                                                   007    
008    This program is distributed in the hope tha    008    This program is distributed in the hope that it will be useful,
009    but WITHOUT ANY WARRANTY; without even the     009    but WITHOUT ANY WARRANTY; without even the implied warranty of
010    MERCHANTABILITY or FITNESS FOR A PARTICULAR    010    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
011    GNU General Public License for more details    011    GNU General Public License for more details.
012                                                   012    
013    You should have received a copy of the GNU     013    You should have received a copy of the GNU General Public License
014    along with this program; if not, write to t    014    along with this program; if not, write to the Free Software
015    Foundation, Inc., 59 Temple Place - Suite 3    015    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
016    USA.                                           016    USA. 
017 */                                                017 */
018 #ifndef _SOS_MACROS_H_                            018 #ifndef _SOS_MACROS_H_
019 #define _SOS_MACROS_H_                            019 #define _SOS_MACROS_H_
020                                                   020 
021 /** Align on a boundary (MUST be a power of 2)    021 /** Align on a boundary (MUST be a power of 2), so that return value <= val */
022 #define SOS_ALIGN_INF(val,boundary) \             022 #define SOS_ALIGN_INF(val,boundary) \
023   (((unsigned)(val)) & (~((boundary)-1)))         023   (((unsigned)(val)) & (~((boundary)-1)))
024                                                   024  
025 /** Align on a boundary (MUST be a power of 2)    025 /** Align on a boundary (MUST be a power of 2), so that return value >= val */
026 #define SOS_ALIGN_SUP(val,boundary) \             026 #define SOS_ALIGN_SUP(val,boundary) \
027   ({ unsigned int __bnd=(boundary); \             027   ({ unsigned int __bnd=(boundary); \
028      (((((unsigned)(val))-1) & (~(__bnd - 1)))    028      (((((unsigned)(val))-1) & (~(__bnd - 1))) + __bnd); })
029                                                   029 
                                                   >> 030 /** Check whether val is aligned on a boundary (MUST be a power of 2) */
                                                   >> 031 #define SOS_IS_ALIGNED(val,boundary) \
                                                   >> 032   ( 0 == (((unsigned)(val)) & ((boundary)-1)) )
                                                   >> 033 
030 /**                                               034 /**
031  * @return TRUE if val is a power of 2.           035  * @return TRUE if val is a power of 2.
032  * @note val is evaluated multiple times          036  * @note val is evaluated multiple times
033  */                                               037  */
034 #define SOS_IS_POWER_OF_2(val) \                  038 #define SOS_IS_POWER_OF_2(val) \
035   ((((val) - 1) & (val)) == 0)                    039   ((((val) - 1) & (val)) == 0)
                                                   >> 040 
                                                   >> 041 /**
                                                   >> 042  * Standard macro to get the offset of the given field in a structure
                                                   >> 043  */
                                                   >> 044 #define offsetof(type,field) \
                                                   >> 045   ((unsigned) &(((type *)0)->field))
036                                                   046 
037 #endif /* _SOS_MACROS_H_ */                       047 #endif /* _SOS_MACROS_H_ */
                                                      

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