1 /* Copyright (C) 2003 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
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 License as
7 published by the Free Software Foundation; either version 2.1 of the
8 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; see the file COPYING.LIB. If
17 not, see <http://www.gnu.org/licenses/>. */
18
19 #include <errno.h>
20 #include <stdlib.h>
21 #include <time.h>
22 #include <sysdep.h>
23 #include <bits/kernel-features.h>
24 #include "kernel-posix-timers.h"
25
26
27 #if defined(__NR_timer_gettime) || defined(__NR_timer_gettime64)
28 # ifndef __ASSUME_POSIX_TIMERS
29 static int compat_timer_gettime (timer_t timerid, struct itimerspec *value);
30 # define timer_gettime static compat_timer_gettime
31 # include <nptl/sysdeps/pthread/timer_gettime.c>
32 # undef timer_gettime
33 # endif
34
35 # ifdef timer_gettime_alias
36 # define timer_gettime timer_gettime_alias
37 # endif
38
39
40 int
timer_gettime(timer_t timerid,struct itimerspec * value)41 timer_gettime (
42 timer_t timerid,
43 struct itimerspec *value)
44 {
45 # undef timer_gettime
46 # ifndef __ASSUME_POSIX_TIMERS
47 if (__no_posix_timers >= 0)
48 # endif
49 {
50 struct timer *kt = (struct timer *) timerid;
51
52 /* Delete the kernel timer object. */
53 # if defined(__UCLIBC_USE_TIME64__) && defined(__NR_timer_gettime64)
54 int res = INLINE_SYSCALL (timer_gettime64, 2, kt->ktimerid, value);
55 # else
56 int res = INLINE_SYSCALL (timer_gettime, 2, kt->ktimerid, value);
57 # endif
58
59 # ifndef __ASSUME_POSIX_TIMERS
60 if (res != -1 || errno != ENOSYS)
61 {
62 /* We know the syscall support is available. */
63 __no_posix_timers = 1;
64 # endif
65 return res;
66 # ifndef __ASSUME_POSIX_TIMERS
67 }
68 # endif
69
70 # ifndef __ASSUME_POSIX_TIMERS
71 __no_posix_timers = -1;
72 # endif
73 }
74
75 # ifndef __ASSUME_POSIX_TIMERS
76 return compat_timer_gettime (timerid, value);
77 # endif
78 }
79 #else
80 # ifdef timer_gettime_alias
81 # define timer_gettime timer_gettime_alias
82 # endif
83 /* The new system calls are not available. Use the userlevel
84 implementation. */
85 # include <nptl/sysdeps/pthread/timer_gettime.c>
86 #endif
87