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Add C2X timespec_getres

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

1
sysdeps/unix/sysv/linux/aarch64/libc.abilist
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@ -2445,6 +2445,7 @@ 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

1
sysdeps/unix/sysv/linux/alpha/libc.abilist
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@ -2536,6 +2536,7 @@ 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

1
sysdeps/unix/sysv/linux/arc/libc.abilist
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@ -2204,6 +2204,7 @@ 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

1
sysdeps/unix/sysv/linux/arm/be/libc.abilist
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@ -311,6 +311,7 @@ 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

1
sysdeps/unix/sysv/linux/arm/le/libc.abilist
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@ -308,6 +308,7 @@ 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

1
sysdeps/unix/sysv/linux/clock_getres.c
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@ -79,6 +79,7 @@ __clock_getres (clockid_t clock_id, struct timespec *res)
return retval;
}
#endif
libc_hidden_def (__clock_getres)
versioned_symbol (libc, __clock_getres, clock_getres, GLIBC_2_17);
/* clock_getres moved to libc in version 2.17;

1
sysdeps/unix/sysv/linux/csky/libc.abilist
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@ -2388,6 +2388,7 @@ 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

1
sysdeps/unix/sysv/linux/hppa/libc.abilist
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@ -2341,6 +2341,7 @@ 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

1
sysdeps/unix/sysv/linux/i386/libc.abilist
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@ -2524,6 +2524,7 @@ 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

1
sysdeps/unix/sysv/linux/ia64/libc.abilist
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@ -2377,6 +2377,7 @@ 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

1
sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist
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@ -312,6 +312,7 @@ 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

1
sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist
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@ -2467,6 +2467,7 @@ 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

1
sysdeps/unix/sysv/linux/microblaze/be/libc.abilist
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@ -2439,6 +2439,7 @@ 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

1
sysdeps/unix/sysv/linux/microblaze/le/libc.abilist
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@ -2436,6 +2436,7 @@ 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

1
sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist
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@ -2432,6 +2432,7 @@ 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

1
sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist
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@ -2430,6 +2430,7 @@ 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

1
sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist
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@ -2438,6 +2438,7 @@ 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

1
sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist
View File

@ -2432,6 +2432,7 @@ 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

1
sysdeps/unix/sysv/linux/nios2/libc.abilist
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@ -2478,6 +2478,7 @@ 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

1
sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist
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@ -2494,6 +2494,7 @@ 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

1
sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist
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@ -2527,6 +2527,7 @@ 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

1
sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist
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@ -2342,6 +2342,7 @@ 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

1
sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist
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@ -2641,6 +2641,7 @@ 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

1
sysdeps/unix/sysv/linux/riscv/rv32/libc.abilist
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@ -2206,6 +2206,7 @@ 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

1
sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist
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@ -2406,6 +2406,7 @@ 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

1
sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist
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@ -2492,6 +2492,7 @@ 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

1
sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist
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@ -2379,6 +2379,7 @@ 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

1
sysdeps/unix/sysv/linux/sh/be/libc.abilist
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@ -2348,6 +2348,7 @@ 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

1
sysdeps/unix/sysv/linux/sh/le/libc.abilist
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@ -2345,6 +2345,7 @@ 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

1
sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist
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@ -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

1
sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist
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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

50
sysdeps/unix/sysv/linux/timespec_getres.c Normal file
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@ -0,0 +1,50 @@
/* Get resolution of a time base.
Copyright (C) 2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <time.h>
/* Set TS to resolution of time base BASE. */
int
__timespec_getres64 (struct __timespec64 *ts, int base)
{
if (base == TIME_UTC)
{
__clock_getres64 (CLOCK_REALTIME, ts);
return base;
}
return 0;
}
#if __TIMESIZE != 64
libc_hidden_def (__timespec_getres64)
int
__timespec_getres (struct timespec *ts, int base)
{
int ret;
struct __timespec64 tp64;
ret = __timespec_getres64 (&tp64, base);
if (ret == TIME_UTC && ts != NULL)
*ts = valid_timespec64_to_timespec (tp64);
return ret;
}
#endif
strong_alias (__timespec_getres, timespec_getres);

1
sysdeps/unix/sysv/linux/x86_64/64/libc.abilist
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@ -2357,6 +2357,7 @@ 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

1
sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist
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@ -2460,6 +2460,7 @@ 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