1 /* Copyright (C) 2003-2021 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
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/>. */
19 #include <kernel-features.h>
22 #include <sysdep-cancel.h>
23 #include "kernel-posix-cpu-timers.h"
25 #include <shlib-compat.h>
27 /* We can simply use the syscall. The CPU clocks are not supported
28 with this function. */
30 __clock_nanosleep_time64 (clockid_t clock_id
, int flags
, const struct __timespec64
*req
,
31 struct __timespec64
*rem
)
33 if (clock_id
== CLOCK_THREAD_CPUTIME_ID
)
35 if (clock_id
== CLOCK_PROCESS_CPUTIME_ID
)
36 clock_id
= MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED
);
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
43 int r
= INTERNAL_SYSCALL_CANCEL (clock_nanosleep_time64
, clock_id
,
46 #ifndef __ASSUME_TIME64_SYSCALLS
47 if (r
== 0 || r
!= -ENOSYS
)
50 if (! in_time_t_range (req
->tv_sec
))
52 __set_errno (EOVERFLOW
);
57 struct timespec ts32
= valid_timespec64_to_timespec (*req
);
58 r
= INTERNAL_SYSCALL_CANCEL (clock_nanosleep
, clock_id
, flags
,
60 if (INTERNAL_SYSCALL_ERROR_P (r
))
62 if (r
== -EINTR
&& rem
!= NULL
&& (flags
& TIMER_ABSTIME
) == 0)
63 *rem
= valid_timespec_to_timespec64 (tr32
);
65 #endif /* __ASSUME_TIME64_SYSCALLS */
71 libc_hidden_def (__clock_nanosleep_time64
)
74 __clock_nanosleep (clockid_t clock_id
, int flags
, const struct timespec
*req
,
78 struct __timespec64 treq64
, trem64
;
80 treq64
= valid_timespec_to_timespec64 (*req
);
81 r
= __clock_nanosleep_time64 (clock_id
, flags
, &treq64
,
82 rem
!= NULL
? &trem64
: NULL
);
84 if (r
== EINTR
&& rem
!= NULL
&& (flags
& TIMER_ABSTIME
) == 0)
85 *rem
= valid_timespec64_to_timespec (trem64
);
90 libc_hidden_def (__clock_nanosleep
)
91 versioned_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)
95 strong_alias (__clock_nanosleep
, __clock_nanosleep_2
);
96 compat_symbol (libc
, __clock_nanosleep_2
, clock_nanosleep
, GLIBC_2_2
);