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/*
* Copyright (C) 2013 IBM Corporation
*
* 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; version 2 of the License.
*
* 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 UTIL_H
#define UTIL_H
#ifndef container_of
#define container_of(_ptr, _type, _member) ({ \
const typeof( ((_type *)0)->_member ) *__mptr = (_ptr); \
(_type *)( (char *)__mptr - offsetof(_type,_member) );})
#endif
#ifndef offsetof
#define offsetof(_type, _member) ((size_t) &((_type *)0)->_member)
#endif
#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
#define min(a,b) ({ \
typeof(a) _min_a = (a); \
typeof(b) _min_b = (b); \
(void)(&_min_a == &_min_b); \
_min_a < _min_b ? _min_a : _min_b; \
})
#define max(a,b) ({ \
typeof(a) _max_a = (a); \
typeof(b) _max_b = (b); \
(void)(&_max_a == &_max_b); \
_max_a > _max_b ? _max_a : _max_b; \
})
#define build_assert(x) \
do { (void)sizeof(char[(x)?1:-1]); } while (0)
#endif /* UTIL_H */
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