Hello Yonggang,

On Tue, 20 Jun 2023 08:25:06 +0800, Yonggang Luo wrote:

> These are:
> #define TIME_MONOTONIC          2
> #define TIME_PROCESS_CPUTIME_ID 3
> #define TIME_THREAD_CPUTIME_ID  4

C23 has these as optional time bases TIME_MONOTONIC, TIME_ACTIVE and
TIME_THREAD_ACTIVE so you should stick to these names.

> #define TIME_MONOTONIC_RAW      5
> #define TIME_REALTIME_COARSE    6
> #define TIME_MONOTONIC_COARSE   7
> #define TIME_BOOTTIME           8
> #define TIME_REALTIME_ALARM     9
> #define TIME_BOOTTIME_ALARM     10
> #define TIME_SGI_CYCLE          11
> #define TIME_TAI                12

Although implementations would be free to chose names for such
extension as they please, I'd suggest you derive the names from the
existing C standard names were this is appropriate. So this then would
in particular be

> #define TIME_UTC_COARSE    6
> #define TIME_UTC_ALARM     9

Thanks
Jₑₙₛ


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