1/* Copyright (C) 2003-2021 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <time.h>
19#include <kernel-features.h>
20#include <errno.h>
21
22#include <sysdep-cancel.h>
23#include "kernel-posix-cpu-timers.h"
24
25#include <shlib-compat.h>
26
27/* We can simply use the syscall. The CPU clocks are not supported
28 with this function. */
29int
30__clock_nanosleep_time64 (clockid_t clock_id, int flags, const struct __timespec64 *req,
31 struct __timespec64 *rem)
32{
33 if (clock_id == CLOCK_THREAD_CPUTIME_ID)
34 return EINVAL;
35 if (clock_id == CLOCK_PROCESS_CPUTIME_ID)
36 clock_id = MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED);
37
38 /* If the call is interrupted by a signal handler or encounters an error,
39 it returns a positive value similar to errno. */
40#ifndef __NR_clock_nanosleep_time64
41# define __NR_clock_nanosleep_time64 __NR_clock_nanosleep
42#endif
43 int r = INTERNAL_SYSCALL_CANCEL (clock_nanosleep_time64, clock_id,
44 flags, req, rem);
45
46#ifndef __ASSUME_TIME64_SYSCALLS
47 if (r == 0 || r != -ENOSYS)
48 return -r;
49
50 if (! in_time_t_range (req->tv_sec))
51 {
52 __set_errno (EOVERFLOW);
53 return -1;
54 }
55
56 struct timespec tr32;
57 struct timespec ts32 = valid_timespec64_to_timespec (*req);
58 r = INTERNAL_SYSCALL_CANCEL (clock_nanosleep, clock_id, flags,
59 &ts32, &tr32);
60 if (INTERNAL_SYSCALL_ERROR_P (r))
61 {
62 if (r == -EINTR && rem != NULL && (flags & TIMER_ABSTIME) == 0)
63 *rem = valid_timespec_to_timespec64 (tr32);
64 }
65#endif /* __ASSUME_TIME64_SYSCALLS */
66
67 return -r;
68}
69
70#if __TIMESIZE != 64
71libc_hidden_def (__clock_nanosleep_time64)
72
73int
74__clock_nanosleep (clockid_t clock_id, int flags, const struct timespec *req,
75 struct timespec *rem)
76{
77 int r;
78 struct __timespec64 treq64, trem64;
79
80 treq64 = valid_timespec_to_timespec64 (*req);
81 r = __clock_nanosleep_time64 (clock_id, flags, &treq64,
82 rem != NULL ? &trem64 : NULL);
83
84 if (r == EINTR && rem != NULL && (flags & TIMER_ABSTIME) == 0)
85 *rem = valid_timespec64_to_timespec (trem64);
86
87 return r;
88}
89#endif
90libc_hidden_def (__clock_nanosleep)
91versioned_symbol (libc, __clock_nanosleep, clock_nanosleep, GLIBC_2_17);
92/* clock_nanosleep moved to libc in version 2.17;
93 old binaries may expect the symbol version it had in librt. */
94#if SHLIB_COMPAT (libc, GLIBC_2_2, GLIBC_2_17)
95strong_alias (__clock_nanosleep, __clock_nanosleep_2);
96compat_symbol (libc, __clock_nanosleep_2, clock_nanosleep, GLIBC_2_2);
97#endif
98