55 lines
1.8 KiB
C
55 lines
1.8 KiB
C
/*
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* utils - misc libubox utility functions
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*
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* Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef __LIBUBOX_UTILS_H
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#define __LIBUBOX_UTILS_H
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#include <sys/types.h>
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/*
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* calloc_a(size_t len, [void **addr, size_t len,...], NULL)
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*
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* allocate a block of memory big enough to hold multiple aligned objects.
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* the pointer to the full object (starting with the first chunk) is returned,
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* all other pointers are stored in the locations behind extra addr arguments.
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* the last argument needs to be a NULL pointer
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*/
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#define calloc_a(len, ...) __calloc_a(len, ##__VA_ARGS__, NULL)
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void *__calloc_a(size_t len, ...);
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#ifndef ARRAY_SIZE
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#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
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#endif
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#define __BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
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#ifdef __OPTIMIZE__
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extern int __BUILD_BUG_ON_CONDITION_FAILED;
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#define BUILD_BUG_ON(condition) \
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do { \
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__BUILD_BUG_ON(condition); \
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if (condition) \
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__BUILD_BUG_ON_CONDITION_FAILED = 1; \
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} while(0)
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#else
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#define BUILD_BUG_ON __BUILD_BUG_ON
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#endif
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#endif
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