From: Joseph Myers <joseph@codesourcery.com>
To: "Albert ARIBAUD (3ADEV)" <albert.aribaud@3adev.fr>
Cc: <libc-alpha@sourceware.org>
Subject: Re: [PATCH 1/2] Y2038: add type __time64_t
Date: Wed, 13 Jun 2018 14:13:00 -0000 [thread overview]
Message-ID: <alpine.DEB.2.20.1806131408360.28522@digraph.polyomino.org.uk> (raw)
In-Reply-To: <20180613070019.4639-2-albert.aribaud@3adev.fr>
There is a key definition you are missing in this patch: one that says
whether the particular glibc configuration supports 32-bit time_t at all.
This new macro could go in bits/wordsize.h, or in its own installed
header. The value is normally the same as (__WORDSIZE == 32), *except* on
x32, which already has 64-bit time_t despite 32-bit wordsize.
The new macro would be used, in the installed headers, to control whether
an explicit _TIME_BITS=32 is valid or not. It would also be used, in
glibc internals, to control whether there are separate 32-bit interfaces
that wrap 64-bit ones, or whether the 64-bit names are just #defined to
the generic ones (#define __clock_gettime64 __clock_gettime, in some
internal header, for example) to avoid creating any new interfaces in the
case where time_t is already 64-bit, while avoiding the need for lots of
conditionals where glibc-internal code written for 64-bit time_t wishes to
call such interfaces.
--
Joseph S. Myers
joseph@codesourcery.com
next prev parent reply other threads:[~2018-06-13 14:13 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-13 7:00 [PATCH 0/2] Y2038 support batch 1 - __time64_t and __tz_convert Albert ARIBAUD (3ADEV)
2018-06-13 7:00 ` [PATCH 1/2] Y2038: add type __time64_t Albert ARIBAUD (3ADEV)
2018-06-13 8:38 ` Paul Eggert
2018-06-13 12:36 ` Albert ARIBAUD
2018-06-13 14:13 ` Joseph Myers [this message]
2018-06-13 16:19 ` Albert ARIBAUD
2018-06-13 16:35 ` Paul Eggert
2018-06-13 16:39 ` Joseph Myers
2018-06-13 18:46 ` Paul Eggert
2018-06-13 7:00 ` [PATCH 2/2] Y2038: make __tz_convert compatible with 64-bit-time Albert ARIBAUD (3ADEV)
2018-06-13 9:10 ` Florian Weimer
2018-06-13 9:37 ` Albert ARIBAUD
2018-06-13 9:40 ` Florian Weimer
2018-06-13 10:21 ` Albert ARIBAUD
2018-06-13 10:55 ` Albert ARIBAUD
2018-06-13 13:08 ` Florian Weimer
2018-06-13 14:29 ` Joseph Myers
2018-06-13 14:24 ` Joseph Myers
2018-06-18 13:34 ` Florian Weimer
2018-06-13 9:11 ` Paul Eggert
2018-06-13 9:14 ` Florian Weimer
2018-06-13 9:30 ` Albert ARIBAUD
2018-06-13 14:22 ` Joseph Myers
2018-06-13 14:18 ` Joseph Myers
2018-06-13 7:59 ` [PATCH 0/2] Y2038 support batch 1 - __time64_t and __tz_convert Albert ARIBAUD
2018-06-13 14:08 ` Joseph Myers
2018-06-13 15:38 ` Albert ARIBAUD
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