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Add C2X timespec_getres

ISO C2X adds a timespec_getres function alongside the C11
timespec_get, with functionality similar to that of POSIX clock_getres
(including allowing a NULL pointer to be passed to the function).
Implement this function for glibc, similarly to the implementation of
timespec_get.

This includes a basic test like that of timespec_get, but no
documentation in the manual, given that TIME_UTC and timespec_get
aren't documented in the manual at all.  The handling of 64-bit time
follows that in timespec_get; people maintaining patch series for
64-bit time will need to update them accordingly (to export
__timespec_getres64, redirect calls in time.h and run the test for
_TIME_BITS=64).

Tested for x86_64 and x86, and (previous version; only testcase
differs) with build-many-glibcs.py.
This commit is contained in:
Joseph Myers
2021-05-17 20:55:21 +00:00
parent c6b6b4f2c7
commit e5ac7bd679
44 changed files with 189 additions and 2 deletions

View File

@ -2485,6 +2485,7 @@ GLIBC_2.34 sem_wait F
GLIBC_2.34 thrd_detach F
GLIBC_2.34 thrd_exit F
GLIBC_2.34 thrd_join F
GLIBC_2.34 timespec_getres F
GLIBC_2.34 tss_create F
GLIBC_2.34 tss_delete F
GLIBC_2.34 tss_get F

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@ -2398,6 +2398,7 @@ GLIBC_2.34 sem_wait F
GLIBC_2.34 thrd_detach F
GLIBC_2.34 thrd_exit F
GLIBC_2.34 thrd_join F
GLIBC_2.34 timespec_getres F
GLIBC_2.34 tss_create F
GLIBC_2.34 tss_delete F
GLIBC_2.34 tss_get F