Re: Privilege Levels Below User

Terje Mathisen <terje.mathisen@tmsw.no> writes:

Modern Unix typically provides 64-bit time_t seconds and a (effectively) =
>
30-bit ns field, so you can store them in a 96-bit container but I don't =
>
think anyone does that?

man time_t tells me:

|time_t
|              ...
|              Used for time in seconds.  According to POSIX, it  shall  be  an
|              integer type.

|timespec
|              ...
|              struct timespec {
|                  time_t  tv_sec;  /* Seconds */
|                  long    tv_nsec; /* Nanoseconds */
|              };
|
|              Describes times in seconds and nanoseconds.
|
|              Conforming to: C11 and later; POSIX.1-2001 and later.

So if you have a 64-bit time_t, the C standard does that, and POSIX
does it earlier.  Typical ABIs pad struct timespec to 128 bits,
though.

- anton
--
'Anyone trying for "industrial quality" ISA should avoid undefined behavior.'
  Mitch Alsup, <c17fcd89-f024-40e7-a594-88a85ac10d20o@googlegroups.com>