1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
/* Copyright (C) 2003 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <time.h>
#include <sysdep-cancel.h>
#include "kernel-features.h"
#ifdef __ASSUME_POSIX_TIMERS
/* We can simply use the syscall. The CPU clocks are not supported
with this function. */
int
clock_nanosleep (clockid_t clock_id, int flags, const struct timespec *req,
struct timespec *rem)
{
INTERNAL_SYSCALL_DECL (err);
int r;
if (SINGLE_THREAD_P)
r = INTERNAL_SYSCALL (clock_nanosleep, err, 4, clock_id, flags, req, rem);
else
{
int oldstate = LIBC_CANCEL_ASYNC ();
r = INTERNAL_SYSCALL (clock_nanosleep, err, 4, clock_id, flags, req,
rem);
LIBC_CANCEL_RESET (oldstate);
}
return (INTERNAL_SYSCALL_ERROR_P (r, err)
? INTERNAL_SYSCALL_ERRNO (r, err) : 0);
}
#else
# ifdef __NR_clock_nanosleep
/* Is the syscall known to exist? */
extern int __libc_missing_posix_timers attribute_hidden;
/* The REALTIME and MONOTONIC clock might be available. Try the
syscall first. */
# define SYSDEP_NANOSLEEP \
if (!__libc_missing_posix_timers) \
{ \
INTERNAL_SYSCALL_DECL (err); \
\
int oldstate = LIBC_CANCEL_ASYNC (); \
\
int r = INTERNAL_SYSCALL (clock_nanosleep, err, 4, clock_id, flags, \
req, rem); \
\
LIBC_CANCEL_RESET (oldstate); \
\
if (!INTERNAL_SYSCALL_ERROR_P (r, err)) \
return 0; \
\
if (INTERNAL_SYSCALL_ERRNO (r, err) != ENOSYS) \
return INTERNAL_SYSCALL_ERRNO (r, err); \
\
__libc_missing_posix_timers = 1; \
}
# endif
# include <sysdeps/unix/clock_nanosleep.c>
#endif
|
GitWeb