array.h

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#pragma once
 
#ifdef __KERNEL__
#define ARRAY_ALLOC kmalloc
#define ARRAY_FREE  kfree
#else
#define ARRAY_ALLOC malloc
#define ARRAY_FREE  free
#endif
 
#define DECLARE_ARRAY(type, name)                                                     \
    typedef struct arr_##name##_t {                                                   \
        const unsigned size;                                                          \
        type *buffer;                                                                 \
    } arr_##name##_t;                                                                 \
    arr_##name##_t alloc_arr_##name(unsigned len)                                     \
    {                                                                                 \
        arr_##name##_t a = { len, len > 0 ? ARRAY_ALLOC(sizeof(type) * len) : NULL }; \
        memset(a.buffer, 0, sizeof(type) * len);                                      \
        return a;                                                                     \
    }                                                                                 \
    static inline void free_arr_##name(arr_##name##_t *arr)                           \
    {                                                                                 \
        ARRAY_FREE(arr->buffer);                                                      \
    }
 
#undef ARRAY_ALLOC
#undef ARRAY_FREE