projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 8dee4833 | 1 | /* Copyright (C) 2003, 2004, 2006, 2010, 2012 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 | |
| 59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
| 16 | <http://www.gnu.org/licenses/>. */ | |
| ad0e8eb0 | 17 | |
| f99ed760 | 18 | #include <errno.h> |
| ad0e8eb0 | 19 | #include <sysdep.h> |
| 8dee4833 | 20 | #include <time.h> |
| ad0e8eb0 | 21 | |
| f99ed760 | 22 | #include "kernel-posix-cpu-timers.h" |
| 6ddd37a4 | 23 | #include <kernel-features.h> |
| ad0e8eb0 | 24 | |
| 89c85f87 | 25 | #ifndef HAVE_CLOCK_GETRES_VSYSCALL |
| f99ed760 UD |
26 | # undef INTERNAL_VSYSCALL |
| 27 | # define INTERNAL_VSYSCALL INTERNAL_SYSCALL | |
| 28 | # undef INLINE_VSYSCALL | |
| 29 | # define INLINE_VSYSCALL INLINE_SYSCALL | |
| 30 | #else | |
| 31 | # include <bits/libc-vdso.h> | |
| 32 | #endif | |
| 33 | ||
| 34 | #if __ASSUME_POSIX_CPU_TIMERS <= 0 && defined __NR_clock_settime | |
| f99ed760 UD |
35 | extern int __libc_missing_posix_cpu_timers attribute_hidden; |
| 36 | ||
| 37 | static int | |
| 38 | maybe_syscall_settime_cpu (clockid_t clock_id, const struct timespec *tp) | |
| 39 | { | |
| 40 | int e = EINVAL; | |
| 41 | ||
| 42 | if (!__libc_missing_posix_cpu_timers) | |
| 43 | { | |
| 44 | INTERNAL_SYSCALL_DECL (err); | |
| 89c85f87 | 45 | int r = INTERNAL_SYSCALL (clock_settime, err, 2, clock_id, tp); |
| f99ed760 | 46 | if (!INTERNAL_SYSCALL_ERROR_P (r, err)) |
| 89a4419c | 47 | return 0; |
| f99ed760 UD |
48 | |
| 49 | e = INTERNAL_SYSCALL_ERRNO (r, err); | |
| 93a78ac4 | 50 | if (e == EINVAL) |
| f99ed760 | 51 | { |
| 93a78ac4 JM |
52 | /* Check whether the kernel supports CPU clocks at all. |
| 53 | If not, record it for the future. */ | |
| 54 | r = INTERNAL_VSYSCALL (clock_getres, err, 2, | |
| 55 | MAKE_PROCESS_CPUCLOCK (0, CPUCLOCK_SCHED), | |
| 56 | NULL); | |
| 57 | if (INTERNAL_SYSCALL_ERROR_P (r, err)) | |
| 58 | __libc_missing_posix_cpu_timers = 1; | |
| f99ed760 UD |
59 | } |
| 60 | } | |
| 61 | ||
| 62 | return e; | |
| 63 | } | |
| 64 | #endif | |
| 65 | ||
| ad0e8eb0 | 66 | |
| 93a78ac4 JM |
67 | /* The REALTIME clock is definitely supported in the kernel. */ |
| 68 | #define SYSDEP_SETTIME \ | |
| ad0e8eb0 UD |
69 | case CLOCK_REALTIME: \ |
| 70 | retval = INLINE_SYSCALL (clock_settime, 2, clock_id, tp); \ | |
| 71 | break | |
| ad0e8eb0 UD |
72 | |
| 73 | #ifdef __NR_clock_settime | |
| 74 | /* We handled the REALTIME clock here. */ | |
| 75 | # define HANDLED_REALTIME 1 | |
| 76 | #endif | |
| 77 | ||
| f99ed760 UD |
78 | #if __ASSUME_POSIX_CPU_TIMERS > 0 |
| 79 | # define HANDLED_CPUTIME 1 | |
| 80 | # define SYSDEP_SETTIME_CPU \ | |
| 81 | retval = INLINE_SYSCALL (clock_settime, 2, clock_id, tp) | |
| 82 | #elif defined __NR_clock_settime | |
| 83 | # define SYSDEP_SETTIME_CPU \ | |
| 84 | retval = maybe_syscall_settime_cpu (clock_id, tp); \ | |
| 85 | if (retval == 0) \ | |
| 86 | break; \ | |
| 87 | if (retval != EINVAL || !__libc_missing_posix_cpu_timers) \ | |
| 88 | { \ | |
| 89 | __set_errno (retval); \ | |
| 90 | retval = -1; \ | |
| 91 | break; \ | |
| 92 | } \ | |
| 93 | do { } while (0) | |
| 94 | #endif | |
| 95 | ||
| ad0e8eb0 | 96 | #include <sysdeps/unix/clock_settime.c> |