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04277e02 | 1 | /* Copyright (C) 1999-2019 Free Software Foundation, Inc. |
13fa3676 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 | |
41bdb6e2 AJ |
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. | |
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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 | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
13fa3676 | 13 | |
41bdb6e2 | 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/>. */ | |
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17 | |
18 | #include <errno.h> | |
8be918b7 | 19 | #include <time.h> |
13fa3676 | 20 | #include <sys/time.h> |
5688da55 | 21 | #include <ldsodefs.h> |
13fa3676 UD |
22 | |
23 | ||
22502ea2 | 24 | #if HP_TIMING_AVAIL && !defined HANDLED_CPUTIME |
3b5c1b57 UD |
25 | /* Clock frequency of the processor. We make it a 64-bit variable |
26 | because some jokers are already playing with processors with more | |
27 | than 4GHz. */ | |
28 | static hp_timing_t freq; | |
29 | ||
30 | ||
3b5c1b57 | 31 | /* This function is defined in the thread library. */ |
4165d44d | 32 | extern void __pthread_clock_settime (clockid_t clock_id, hp_timing_t offset) |
3b5c1b57 | 33 | __attribute__ ((__weak__)); |
13fa3676 | 34 | |
3b5c1b57 | 35 | |
f99ed760 UD |
36 | static int |
37 | hp_timing_settime (clockid_t clock_id, const struct timespec *tp) | |
38 | { | |
39 | hp_timing_t tsc; | |
40 | hp_timing_t usertime; | |
41 | ||
42 | /* First thing is to get the current time. */ | |
43 | HP_TIMING_NOW (tsc); | |
44 | ||
a1ffb40e | 45 | if (__glibc_unlikely (freq == 0)) |
f99ed760 UD |
46 | { |
47 | /* This can only happen if we haven't initialized the `freq' | |
48 | variable yet. Do this now. We don't have to protect this | |
49 | code against multiple execution since all of them should lead | |
50 | to the same result. */ | |
51 | freq = __get_clockfreq (); | |
a1ffb40e | 52 | if (__glibc_unlikely (freq == 0)) |
f99ed760 UD |
53 | /* Something went wrong. */ |
54 | return -1; | |
55 | } | |
56 | ||
57 | /* Convert the user-provided time into CPU ticks. */ | |
58 | usertime = tp->tv_sec * freq + (tp->tv_nsec * freq) / 1000000000ull; | |
59 | ||
60 | /* Determine the offset and use it as the new base value. */ | |
61 | if (clock_id == CLOCK_PROCESS_CPUTIME_ID | |
62 | || __pthread_clock_settime == NULL) | |
63 | GL(dl_cpuclock_offset) = tsc - usertime; | |
64 | else | |
65 | __pthread_clock_settime (clock_id, tsc - usertime); | |
66 | ||
67 | return 0; | |
68 | } | |
69 | #endif | |
70 | ||
71 | ||
13fa3676 UD |
72 | /* Set CLOCK to value TP. */ |
73 | int | |
89fb6835 | 74 | __clock_settime (clockid_t clock_id, const struct timespec *tp) |
13fa3676 | 75 | { |
13fa3676 UD |
76 | int retval; |
77 | ||
e79af11c UD |
78 | /* Make sure the time cvalue is OK. */ |
79 | if (tp->tv_nsec < 0 || tp->tv_nsec >= 1000000000) | |
80 | { | |
81 | __set_errno (EINVAL); | |
82 | return -1; | |
83 | } | |
84 | ||
13fa3676 UD |
85 | switch (clock_id) |
86 | { | |
ad0e8eb0 UD |
87 | #define HANDLE_REALTIME \ |
88 | do { \ | |
b6e2f87a | 89 | struct timeval tv; \ |
ad0e8eb0 UD |
90 | TIMESPEC_TO_TIMEVAL (&tv, tp); \ |
91 | \ | |
fcafcd16 | 92 | retval = __settimeofday (&tv, NULL); \ |
a46fde6e | 93 | } while (0) |
ad0e8eb0 | 94 | |
1dc74473 UD |
95 | #ifdef SYSDEP_SETTIME |
96 | SYSDEP_SETTIME; | |
ad0e8eb0 | 97 | #endif |
13fa3676 | 98 | |
ad0e8eb0 UD |
99 | #ifndef HANDLED_REALTIME |
100 | case CLOCK_REALTIME: | |
101 | HANDLE_REALTIME; | |
13fa3676 | 102 | break; |
ad0e8eb0 | 103 | #endif |
13fa3676 | 104 | |
4165d44d | 105 | default: |
f99ed760 UD |
106 | #ifdef SYSDEP_SETTIME_CPU |
107 | SYSDEP_SETTIME_CPU; | |
4165d44d | 108 | #endif |
f99ed760 UD |
109 | #ifndef HANDLED_CPUTIME |
110 | # if HP_TIMING_AVAIL | |
111 | if (CPUCLOCK_WHICH (clock_id) == CLOCK_PROCESS_CPUTIME_ID | |
112 | || CPUCLOCK_WHICH (clock_id) == CLOCK_THREAD_CPUTIME_ID) | |
113 | retval = hp_timing_settime (clock_id, tp); | |
114 | else | |
115 | # endif | |
4165d44d UD |
116 | { |
117 | __set_errno (EINVAL); | |
118 | retval = -1; | |
4165d44d | 119 | } |
a334319f | 120 | #endif |
f99ed760 | 121 | break; |
13fa3676 UD |
122 | } |
123 | ||
124 | return retval; | |
125 | } | |
89fb6835 | 126 | weak_alias (__clock_settime, clock_settime) |