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toolchain: common: Extending macro set for memory sections

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Added macro for getting nth element from section.
Added macro for counting elements in the section.

Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
This commit is contained in:
Krzysztof Chruscinski 2022-02-15 10:17:04 +01:00 committed by Carles Cufí
parent a4fe0edfdc
commit 4c9633c2aa
1 changed files with 27 additions and 0 deletions
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27
include/zephyr/toolchain/common.h
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@ -243,6 +243,33 @@
iterator < _CONCAT(_##struct_type, _list_end); }); \
iterator++)
/**
* @brief Get element from section.
*
* @note There is no protection against reading beyond the section.
*
* @param[in] struct_type Struct type.
* @param[in] i Index.
* @param[out] dst Pointer to location where pointer to element is written.
*/
#define STRUCT_SECTION_GET(struct_type, i, dst) do { \
extern struct struct_type _CONCAT(_##struct_type, _list_start)[]; \
*(dst) = &_CONCAT(_##struct_type, _list_start)[i]; \
} while (0)
/**
* @brief Count elements in a section.
*
* @param[in] struct_type Struct type
* @param[out] dst Pointer to location where result is written.
*/
#define STRUCT_SECTION_COUNT(struct_type, dst) do { \
extern struct struct_type _CONCAT(_##struct_type, _list_start)[]; \
extern struct struct_type _CONCAT(_##struct_type, _list_end)[]; \
*(dst) = ((uintptr_t)_CONCAT(_##struct_type, _list_end) - \
(uintptr_t)_CONCAT(_##struct_type, _list_start)) / sizeof(struct struct_type); \
} while (0)
/**
* @}
*/ /* end of struct_section_apis */