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- /* clock_getres -- Get the resolution of a POSIX clockid_t. Linux version.
- Copyright (C) 2003-2019 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, or (at your option) any later version.
- 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
- <http://www.gnu.org/licenses/>. */
- #include <sysdep.h>
- #include <errno.h>
- #include <time.h>
- #include "kernel-posix-cpu-timers.h"
- #ifdef HAVE_CLOCK_GETRES_VSYSCALL
- # define HAVE_VSYSCALL
- #endif
- #include <sysdep-vdso.h>
- #define SYSCALL_GETRES \
- retval = INLINE_VSYSCALL (clock_getres, 2, clock_id, res); \
- break
- /* The REALTIME and MONOTONIC clock are definitely supported in the
- kernel. */
- #define SYSDEP_GETRES \
- SYSDEP_GETRES_CPUTIME \
- case CLOCK_REALTIME: \
- case CLOCK_MONOTONIC: \
- case CLOCK_MONOTONIC_RAW: \
- case CLOCK_REALTIME_COARSE: \
- case CLOCK_MONOTONIC_COARSE: \
- SYSCALL_GETRES
- /* We handled the REALTIME clock here. */
- #define HANDLED_REALTIME 1
- #define HANDLED_CPUTIME 1
- #define SYSDEP_GETRES_CPU SYSCALL_GETRES
- #define SYSDEP_GETRES_CPUTIME /* Default catches them too. */
- #include <sysdeps/posix/clock_getres.c>
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