Error Codes

include/errno.h View source View on GitHub

Structs

err_facility

struct err_facility {
    uint16_t    prefix;
    const char  *name;
    const char  *desc;
    const char  *(*const to_str)(uint16_t delta);
};

Enums

errno

enum errno {
    ERR_OK = 0,
    ERR_UNKNOWN = -1,
    ERR_NO_MEM = -2,
    ERR_NO_DEV = -3,
    ERR_NO_ENT = -4,
    ERR_EXIST = -5,
    ERR_IO = -6,
    ERR_NOT_DIR = -7,
    ERR_IS_DIR = -8,
    ERR_INVAL = -9,
    ERR_PERM = -10,
    ERR_FAULT = -11,
    ERR_BUSY = -12,
    ERR_AGAIN = -13,
    ERR_NOT_IMPL = -14,
    ERR_NOSPC = -15,
    ERR_OVERFLOW = -16,
    ERR_NOT_EMPTY = -17,
};

Functions

errno_facility_to_str

const char * errno_facility_to_str(enum errno err);

err_facilities_init

void err_facilities_init();

errno_to_str

char errno_to_str(enum errno err);

Macros

ERR_IS_FATAL

#define ERR_IS_FATAL(e) (e != ERR_OK && e != ERR_AGAIN)

ERR_IS_MATCH_1

#define ERR_IS_MATCH_1(v, a) ((v) == (a))

ERR_IS_MATCH_2

#define ERR_IS_MATCH_2(v, a, b) (ERR_IS_MATCH_1(v, a) || ((v) == (b)))

ERR_IS_MATCH_3

#define ERR_IS_MATCH_3(v, a, b, c) (ERR_IS_MATCH_2(v, a, b) || ((v) == (c)))

ERR_IS_MATCH_4

#define ERR_IS_MATCH_4(v, a, b, c, d) \
    (ERR_IS_MATCH_3(v, a, b, c) || ((v) == (d)))

ERR_IS_MATCH_5

#define ERR_IS_MATCH_5(v, a, b, c, d, e) \
    (ERR_IS_MATCH_4(v, a, b, c, d) || ((v) == (e)))

ERR_IS_MATCH_6

#define ERR_IS_MATCH_6(v, a, b, c, d, e, f) \
    (ERR_IS_MATCH_5(v, a, b, c, d, e) || ((v) == (f)))

ERR_IS_MATCH_7

#define ERR_IS_MATCH_7(v, a, b, c, d, e, f, g) \
    (ERR_IS_MATCH_6(v, a, b, c, d, e, f) || ((v) == (g)))

ERR_IS_MATCH_8

#define ERR_IS_MATCH_8(v, a, b, c, d, e, f, g, h) \
    (ERR_IS_MATCH_7(v, a, b, c, d, e, f, g) || ((v) == (h)))

ERR_GUARD

#define ERR_GUARD(val, ...) \
    ({ \
        __auto_type _v = (val); \
        if (unlikely(_v < 0 && !_DISPATCH(ERR_IS_MATCH, PP_NARG(__VA_ARGS__))( \
                                   _v, __VA_ARGS__))) \
            panic("unhandled error: %s", errno_to_str(_v)); \
        _v; \
    })

ERR_CREATE

#define ERR_CREATE(pre, del) \
    ({ \
        kassert((del & 0xFFFF) == del); \
        kassert(del > 0); \
        -((((int) (pre)) << 16) | (((int) (del)) & 0xFFFF)); \
    })

ERR_GET_FACILITY

#define ERR_GET_FACILITY(e) \
    ({ \
        kassert(e < 0); \
        ((-(e)) >> 16) & 0xFFFF; \
    })

ERR_GET_DELTA

#define ERR_GET_DELTA(e) \
    ({ \
        kassert(e < 0); \
        ((-(e)) & 0xFFFF); \
    })

ERR_PREFIX

#define ERR_PREFIX(n) ((__err_facility_##n).prefix)

ERR_DELTA_START

#define ERR_DELTA_START (1)

ERR

#define ERR(n, d) ERR_CREATE(ERR_PREFIX(n), d)

ERR_FACILITY

#define ERR_FACILITY(n) __err_facility_##n

ERR_FACILITY_EXTERN

#define ERR_FACILITY_EXTERN(n) extern struct err_facility __err_facility_##n

ERR_FACILITY_DECLARE

#define ERR_FACILITY_DECLARE(n, ...) \
    LINKER_SECTION_OBJECT(struct err_facility, err_facilities) \
    __err_facility_##n = {.name = #n, __VA_ARGS__}

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