1 | /* clock_getres -- Get the resolution of a POSIX clockid_t. Linux version. |
2 | Copyright (C) 2003-2017 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <sysdep.h> |
20 | #include <errno.h> |
21 | #include <time.h> |
22 | #include "kernel-posix-cpu-timers.h" |
23 | |
24 | #ifdef HAVE_CLOCK_GETRES_VSYSCALL |
25 | # define HAVE_VSYSCALL |
26 | #endif |
27 | #include <sysdep-vdso.h> |
28 | |
29 | #define SYSCALL_GETRES \ |
30 | retval = INLINE_VSYSCALL (clock_getres, 2, clock_id, res); \ |
31 | break |
32 | |
33 | /* The REALTIME and MONOTONIC clock are definitely supported in the |
34 | kernel. */ |
35 | #define SYSDEP_GETRES \ |
36 | SYSDEP_GETRES_CPUTIME \ |
37 | case CLOCK_REALTIME: \ |
38 | case CLOCK_MONOTONIC: \ |
39 | case CLOCK_MONOTONIC_RAW: \ |
40 | case CLOCK_REALTIME_COARSE: \ |
41 | case CLOCK_MONOTONIC_COARSE: \ |
42 | SYSCALL_GETRES |
43 | |
44 | /* We handled the REALTIME clock here. */ |
45 | #define HANDLED_REALTIME 1 |
46 | #define HANDLED_CPUTIME 1 |
47 | |
48 | #define SYSDEP_GETRES_CPU SYSCALL_GETRES |
49 | #define SYSDEP_GETRES_CPUTIME /* Default catches them too. */ |
50 | |
51 | #include <sysdeps/posix/clock_getres.c> |
52 | |