| /* clock_getres -- Get the resolution of a POSIX clockid_t. Linux version. |
| Copyright (C) 2003-2014 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" |
| #include <kernel-features.h> |
| |
| #ifndef HAVE_CLOCK_GETRES_VSYSCALL |
| # undef INTERNAL_VSYSCALL |
| # define INTERNAL_VSYSCALL INTERNAL_SYSCALL |
| # undef INLINE_VSYSCALL |
| # define INLINE_VSYSCALL INLINE_SYSCALL |
| #else |
| # include <bits/libc-vdso.h> |
| #endif |
| |
| #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> |
