1/* Copyright (C) 2003-2017 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 <http://www.gnu.org/licenses/>. */
17
18#include <time.h>
19#include <errno.h>
20
21#include <sysdep-cancel.h>
22#include "kernel-posix-cpu-timers.h"
23
24
25/* We can simply use the syscall. The CPU clocks are not supported
26 with this function. */
27int
28__clock_nanosleep (clockid_t clock_id, int flags, const struct timespec *req,
29 struct timespec *rem)
30{
31 INTERNAL_SYSCALL_DECL (err);
32 int r;
33
34 if (clock_id == CLOCK_THREAD_CPUTIME_ID)
35 return EINVAL;
36 if (clock_id == CLOCK_PROCESS_CPUTIME_ID)
37 clock_id = MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED);
38
39 if (SINGLE_THREAD_P)
40 r = INTERNAL_SYSCALL (clock_nanosleep, err, 4, clock_id, flags, req, rem);
41 else
42 {
43 int oldstate = LIBC_CANCEL_ASYNC ();
44
45 r = INTERNAL_SYSCALL (clock_nanosleep, err, 4, clock_id, flags, req,
46 rem);
47
48 LIBC_CANCEL_RESET (oldstate);
49 }
50
51 return (INTERNAL_SYSCALL_ERROR_P (r, err)
52 ? INTERNAL_SYSCALL_ERRNO (r, err) : 0);
53}
54weak_alias (__clock_nanosleep, clock_nanosleep)
55