[PATCH 2/4] time: Push tzset lock into callers of time functions

[Alexander Monakov]

On Tue, 1 Oct 2024, Paul Eggert wrote:

> On 2024-10-01 05:14, Florian Weimer wrote:
> >     if (local)
> >       return __localtime64_r (&x, tm);
> >     else
> >       return __gmtime64_r (&x, tm);
> 
> Slightly more elegant (and more efficient with gcc -O2 on x86-64 at least, as
> it avoids a conditional branch) is:
> 
>    return (local ? __localtime64_r : __gmtime64_r) (&x, tm);

On the flip side, in PIC for libc.so this needs a PC-relative computation,
which is not as cheap as amd64's rip-relative lea everywhere.

Alexander