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author | Alex AUVOLAT <alex.auvolat@ens.fr> | 2014-03-28 09:10:23 +0100 |
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committer | Alex AUVOLAT <alex.auvolat@ens.fr> | 2014-03-28 09:10:23 +0100 |
commit | bb55beef914e7488350ad1d0419d4bc60ad63c99 (patch) | |
tree | b1cfe0e5c76cbca16e7e3c16e108c23e366a2902 /sos-code-article3/sos/macros.h | |
download | SOS-bb55beef914e7488350ad1d0419d4bc60ad63c99.tar.gz SOS-bb55beef914e7488350ad1d0419d4bc60ad63c99.zip |
Import code for article1, 2, 3, 4
Diffstat (limited to 'sos-code-article3/sos/macros.h')
-rw-r--r-- | sos-code-article3/sos/macros.h | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/sos-code-article3/sos/macros.h b/sos-code-article3/sos/macros.h new file mode 100644 index 0000000..b08f081 --- /dev/null +++ b/sos-code-article3/sos/macros.h @@ -0,0 +1,37 @@ +/* Copyright (C) 2004 The KOS Team + + This program is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License + as published by the Free Software Foundation; either version 2 + of the License, or (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, + USA. +*/ +#ifndef _SOS_MACROS_H_ +#define _SOS_MACROS_H_ + +/** Align on a boundary (MUST be a power of 2), so that return value <= val */ +#define SOS_ALIGN_INF(val,boundary) \ + (((unsigned)(val)) & (~((boundary)-1))) + +/** Align on a boundary (MUST be a power of 2), so that return value >= val */ +#define SOS_ALIGN_SUP(val,boundary) \ + ({ unsigned int __bnd=(boundary); \ + (((((unsigned)(val))-1) & (~(__bnd - 1))) + __bnd); }) + +/** + * @return TRUE if val is a power of 2. + * @note val is evaluated multiple times + */ +#define SOS_IS_POWER_OF_2(val) \ + ((((val) - 1) & (val)) == 0) + +#endif /* _SOS_MACROS_H_ */ |