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2f4f3bd4 | 1 | /* Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc. |
ad0e8eb0 UD |
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, write to the Free | |
16 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
17 | 02111-1307 USA. */ | |
18 | ||
19 | #include <time.h> | |
2f4f3bd4 | 20 | #include <errno.h> |
ad0e8eb0 | 21 | |
7a114794 | 22 | #include <sysdep-cancel.h> |
a334319f | 23 | #include "kernel-features.h" |
2f4f3bd4 | 24 | #include "kernel-posix-cpu-timers.h" |
ad0e8eb0 UD |
25 | |
26 | ||
27 | #ifdef __ASSUME_POSIX_TIMERS | |
28 | /* We can simply use the syscall. The CPU clocks are not supported | |
29 | with this function. */ | |
30 | int | |
31 | clock_nanosleep (clockid_t clock_id, int flags, const struct timespec *req, | |
32 | struct timespec *rem) | |
33 | { | |
34 | INTERNAL_SYSCALL_DECL (err); | |
35 | int r; | |
36 | ||
2f4f3bd4 RM |
37 | if (clock_id == CLOCK_THREAD_CPUTIME_ID) |
38 | return EINVAL; | |
39 | if (clock_id == CLOCK_PROCESS_CPUTIME_ID) | |
40 | clock_id = MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED); | |
41 | ||
7a114794 UD |
42 | if (SINGLE_THREAD_P) |
43 | r = INTERNAL_SYSCALL (clock_nanosleep, err, 4, clock_id, flags, req, rem); | |
44 | else | |
45 | { | |
46 | int oldstate = LIBC_CANCEL_ASYNC (); | |
47 | ||
48 | r = INTERNAL_SYSCALL (clock_nanosleep, err, 4, clock_id, flags, req, | |
49 | rem); | |
50 | ||
51 | LIBC_CANCEL_RESET (oldstate); | |
52 | } | |
53 | ||
ad0e8eb0 UD |
54 | return (INTERNAL_SYSCALL_ERROR_P (r, err) |
55 | ? INTERNAL_SYSCALL_ERRNO (r, err) : 0); | |
56 | } | |
57 | ||
58 | #else | |
59 | # ifdef __NR_clock_nanosleep | |
60 | /* Is the syscall known to exist? */ | |
61 | extern int __libc_missing_posix_timers attribute_hidden; | |
62 | ||
63 | /* The REALTIME and MONOTONIC clock might be available. Try the | |
64 | syscall first. */ | |
65 | # define SYSDEP_NANOSLEEP \ | |
66 | if (!__libc_missing_posix_timers) \ | |
67 | { \ | |
2f4f3bd4 | 68 | clockid_t syscall_clockid; \ |
ad0e8eb0 | 69 | INTERNAL_SYSCALL_DECL (err); \ |
7a114794 | 70 | \ |
2f4f3bd4 RM |
71 | if (clock_id == CLOCK_THREAD_CPUTIME_ID) \ |
72 | return EINVAL; \ | |
73 | if (clock_id == CLOCK_PROCESS_CPUTIME_ID) \ | |
74 | syscall_clockid = MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED); \ | |
75 | else \ | |
76 | syscall_clockid = clock_id; \ | |
77 | \ | |
7a114794 UD |
78 | int oldstate = LIBC_CANCEL_ASYNC (); \ |
79 | \ | |
2f4f3bd4 RM |
80 | int r = INTERNAL_SYSCALL (clock_nanosleep, err, 4, \ |
81 | syscall_clockid, flags, req, rem); \ | |
ad0e8eb0 | 82 | \ |
7a114794 UD |
83 | LIBC_CANCEL_RESET (oldstate); \ |
84 | \ | |
ad0e8eb0 UD |
85 | if (!INTERNAL_SYSCALL_ERROR_P (r, err)) \ |
86 | return 0; \ | |
87 | \ | |
88 | if (INTERNAL_SYSCALL_ERRNO (r, err) != ENOSYS) \ | |
89 | return INTERNAL_SYSCALL_ERRNO (r, err); \ | |
7a114794 | 90 | \ |
ad0e8eb0 UD |
91 | __libc_missing_posix_timers = 1; \ |
92 | } | |
93 | # endif | |
94 | ||
95 | # include <sysdeps/unix/clock_nanosleep.c> | |
96 | #endif |