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108 lines
3.2 KiB
108 lines
3.2 KiB
13 years ago
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef __SHARED_COMPILER_H
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#define __SHARED_COMPILER_H
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#define __noinline __attribute__((noinline))
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#define __noreturn __attribute__((noreturn))
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#define __inline __attribute__((always_inline))
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#define __hot __attribute__((hot))
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#define __cold __attribute__((cold))
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#define __unused __attribute__((unused))
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#define __force __attribute__((force))
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#define __section(s) __attribute__((section("." # s)))
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#define __aligned(a) __attribute__((aligned(a)))
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#define __packed __attribute__((packed))
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#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
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#define BUILD_BUG_ON_ZERO(e) (sizeof(char[1 - 2 * !!(e)]) - 1)
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#define ALIGN(x, a) __ALIGN_MASK(x, (typeof(x))(a) - 1)
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#define __ALIGN_MASK(x, mask) (((x) + (mask)) & ~(mask))
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#define __roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y))
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#define __must_be_array(a) \
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BUILD_BUG_ON_ZERO(__builtin_types_compatible_p(typeof(a), typeof(&a[0])))
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#define ARRAY_SIZE(arr) (sizeof((arr)) / sizeof((arr)[0]) + __must_be_array(arr))
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#define BIT(b) (1 << (b))
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#define MASK(w) (BIT(w) - 1)
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#undef offsetof
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#ifdef __compiler_offsetof
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# define offsetof(TYPE, MEMBER) __compiler_offsetof(TYPE, MEMBER)
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#else
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# define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
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#endif
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#define likely(x) __builtin_expect(!!(x), 1)
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#define unlikely(x) __builtin_expect(!!(x), 0)
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#define min(x, y) ({ \
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typeof(x) _min1 = (x); \
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typeof(y) _min2 = (y); \
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(void) (&_min1 == &_min2); \
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_min1 < _min2 ? _min1 : _min2; })
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#define max(x, y) ({ \
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typeof(x) _max1 = (x); \
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typeof(y) _max2 = (y); \
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(void) (&_max1 == &_max2); \
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_max1 > _max2 ? _max1 : _max2; })
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#define min_t(type, x, y) ({ \
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type __min1 = (x); \
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type __min2 = (y); \
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__min1 < __min2 ? __min1 : __min2; })
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#define max_t(type, x, y) ({ \
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type __max1 = (x); \
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type __max2 = (y); \
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__max1 > __max2 ? __max1 : __max2; })
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#define container_of(ptr, type, member) ({ \
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const typeof(((type *)0)->member) * __mptr = (ptr); \
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(type *)(((unsigned long)__mptr - offsetof(type, member))); })
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#define MAX_ERRNO 4095
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#define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO)
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static inline void *ERR_PTR(long errornr)
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{
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return (void *) errornr;
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}
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static inline long PTR_ERR(const void *ptr)
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{
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return (long) ptr;
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}
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static inline long IS_ERR(const void *ptr)
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{
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return IS_ERR_VALUE((unsigned long)ptr);
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}
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static inline long IS_ERR_OR_NULL(const void *ptr)
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{
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return !ptr || IS_ERR_VALUE((unsigned long)ptr);
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}
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#endif /* __SHARED_COMPILER_H */
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