1 /*
2 * Copyright (C) 2013 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include "private/bionic_time_conversions.h"
30
31 #include "private/bionic_constants.h"
32
timespec_from_timeval(timespec & ts,const timeval & tv)33 bool timespec_from_timeval(timespec& ts, const timeval& tv) {
34 // Whole seconds can just be copied.
35 ts.tv_sec = tv.tv_sec;
36
37 // But we might overflow when converting microseconds to nanoseconds.
38 if (tv.tv_usec >= 1000000 || tv.tv_usec < 0) {
39 return false;
40 }
41 ts.tv_nsec = tv.tv_usec * 1000;
42 return true;
43 }
44
timespec_from_ms(timespec & ts,const int ms)45 void timespec_from_ms(timespec& ts, const int ms) {
46 ts.tv_sec = ms / 1000;
47 ts.tv_nsec = (ms % 1000) * 1000000;
48 }
49
timeval_from_timespec(timeval & tv,const timespec & ts)50 void timeval_from_timespec(timeval& tv, const timespec& ts) {
51 tv.tv_sec = ts.tv_sec;
52 tv.tv_usec = ts.tv_nsec / 1000;
53 }
54
55 // Initializes 'ts' with the difference between 'abs_ts' and the current time
56 // according to 'clock'. Returns false if abstime already expired, true otherwise.
timespec_from_absolute_timespec(timespec & ts,const timespec & abs_ts,clockid_t clock)57 bool timespec_from_absolute_timespec(timespec& ts, const timespec& abs_ts, clockid_t clock) {
58 clock_gettime(clock, &ts);
59 ts.tv_sec = abs_ts.tv_sec - ts.tv_sec;
60 ts.tv_nsec = abs_ts.tv_nsec - ts.tv_nsec;
61 if (ts.tv_nsec < 0) {
62 ts.tv_sec--;
63 ts.tv_nsec += NS_PER_S;
64 }
65 if (ts.tv_nsec < 0 || ts.tv_sec < 0) {
66 return false;
67 }
68 return true;
69 }
70