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Re: [PATCH v2 05/10] Use clock_gettime to implement time.

From: Paul Eggert <eggert at cs dot ucla dot edu>
To: Florian Weimer <fweimer at redhat dot com>, Zack Weinberg <zackw at panix dot com>
Cc: libc-alpha at sourceware dot org, Joseph Myers <joseph at codesourcery dot com>, Lukasz Majewski <lukma at denx dot de>, Alistair Francis <alistair23 at gmail dot com>, Stepan Golosunov <stepan at golosunov dot pp dot ru>, Arnd Bergmann <arnd at arndb dot de>, Adhemerval Zanella <adhemerval dot zanella at linaro dot org>, Samuel Thibault <samuel dot thibault at ens-lyon dot org>
Date: Wed, 28 Aug 2019 13:01:45 -0700
Subject: Re: [PATCH v2 05/10] Use clock_gettime to implement time.
References: <20190828153236.18229-1-zackw@panix.com> <20190828153236.18229-6-zackw@panix.com> <87muftb1fk.fsf@oldenburg2.str.redhat.com>

Florian Weimer wrote:

Given that time has no stringent accuracy requirements, this shouldn't
come as a surprise.

In what sense does 'time' have less-stringent accuracy requirements thanclock_gettime (CLOCK_REALTIME) does? Can 'time' return a value that disagreeswith the time_t part of what clock_gettime (CLOCK_REALTIME) returns? Any suchdisagreement would cause application bugs that could well be unlikely and hardto track down; also, if there is disagreement, replacing calls to 'time' withcalls to clock_gettime might not be advisable even aside from performance issues.

Follow-Ups:
- Re: [PATCH v2 05/10] Use clock_gettime to implement time.
  - From: Florian Weimer

References:
- [PATCH v2 00/10] Y2038 preparation: use clock_[gs]ettime to implement the other time-getting and -setting functions.
  - From: Zack Weinberg
- [PATCH v2 05/10] Use clock_gettime to implement time.
  - From: Zack Weinberg
- Re: [PATCH v2 05/10] Use clock_gettime to implement time.
  - From: Florian Weimer

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