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Always define __USE_TIME_BITS64 when 64 bit time_t is used

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It was raised on libc-help [1] that some Linux kernel interfaces expect
the libc to define __USE_TIME_BITS64 to indicate the time_t size for the
kABI.  Different than defined by the initial y2038 design document [2],
the __USE_TIME_BITS64 is only defined for ABIs that support more than
one time_t size (by defining the _TIME_BITS for each module).

The 64 bit time_t redirects are now enabled using a different internal
define (__USE_TIME64_REDIRECTS). There is no expected change in semantic
or code generation.

Checked on x86_64-linux-gnu, i686-linux-gnu, aarch64-linux-gnu, and
arm-linux-gnueabi

[1] https://sourceware.org/pipermail/libc-help/2024-January/006557.html
[2] https://sourceware.org/glibc/wiki/Y2038ProofnessDesign

Reviewed-by: DJ Delorie <dj@redhat.com>
This commit is contained in:
Adhemerval Zanella
2024-01-18 10:18:01 -03:00
parent a0698a5e92
commit a4ed0471d7
75 changed files with 178 additions and 182 deletions
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4
sysdeps/pthread/semaphore.h
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@ -59,7 +59,7 @@ extern int sem_wait (sem_t *__sem) __nonnull ((1));
This function is a cancellation point and therefore not marked with
__THROW. */
# ifndef __USE_TIME_BITS64
# ifndef __USE_TIME64_REDIRECTS
extern int sem_timedwait (sem_t *__restrict __sem,
const struct timespec *__restrict __abstime)
__nonnull ((1, 2));
@ -77,7 +77,7 @@ extern int __REDIRECT (sem_timedwait,
#endif
#ifdef __USE_GNU
# ifndef __USE_TIME_BITS64
# ifndef __USE_TIME64_REDIRECTS
extern int sem_clockwait (sem_t *__restrict __sem,
clockid_t clock,
const struct timespec *__restrict __abstime)

6
sysdeps/pthread/threads.h
View File

@ -90,7 +90,7 @@ extern thrd_t thrd_current (void);
__TIME_POINT. The current thread may resume if receives a signal. In
that case, if __REMAINING is not NULL, the remaining time is stored in
the object pointed by it. */
#ifndef __USE_TIME_BITS64
#ifndef __USE_TIME64_REDIRECTS
extern int thrd_sleep (const struct timespec *__time_point,
struct timespec *__remaining);
#else
@ -143,7 +143,7 @@ extern int mtx_lock (mtx_t *__mutex);
/* Block the current thread until the mutex pointed by __MUTEX is unlocked
or time pointed by __TIME_POINT is reached. In case the mutex is unlock,
the current thread will not be blocked. */
#ifndef __USE_TIME_BITS64
#ifndef __USE_TIME64_REDIRECTS
extern int mtx_timedlock (mtx_t *__restrict __mutex,
const struct timespec *__restrict __time_point);
#else
@ -194,7 +194,7 @@ extern int cnd_wait (cnd_t *__cond, mtx_t *__mutex);
/* Block current thread on the condition variable until condition variable
pointed by __COND is signaled or time pointed by __TIME_POINT is
reached. */
#ifndef __USE_TIME_BITS64
#ifndef __USE_TIME64_REDIRECTS
extern int cnd_timedwait (cnd_t *__restrict __cond,
mtx_t *__restrict __mutex,
const struct timespec *__restrict __time_point);