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common: rename array-size.h to macros.h

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John Lindgren 2023-10-20 18:34:14 -04:00 • committed by Johan Malm
parent 7f30de1134
commit a036d985d7
8 changed files with 11 additions and 11 deletions
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19
include/common/macros.h Normal file
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/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef LABWC_MACROS_H
#define LABWC_MACROS_H
/**
* ARRAY_SIZE() - Get the number of elements in array.
* @arr: array to be sized
*
* This does not work on pointers.
*
* Recent versions of GCC and clang support -Werror=sizeof-pointer-div
* and thus avoids using constructs such as:
*
* #define same_type(a, b) (__builtin_types_compatible_p(typeof(a), typeof(b)) == 1)
* #define ARRAY_SIZE(a) ({ static_assert(!same_type(a, &(a)[0])); sizeof(a) / sizeof(a[0]); })
*/
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
#endif /* LABWC_MACROS_H */