1/***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at https://curl.haxx.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 ***************************************************************************/
22#include "curl_setup.h"
23#include <curl/curl.h>
24#include "testutil.h"
25#include "memdebug.h"
26
27#if defined(WIN32) && !defined(MSDOS)
28
29struct timeval tutil_tvnow(void)
30{
31 /*
32 ** GetTickCount() is available on _all_ Windows versions from W95 up
33 ** to nowadays. Returns milliseconds elapsed since last system boot,
34 ** increases monotonically and wraps once 49.7 days have elapsed.
35 */
36 struct timeval now;
37 DWORD milliseconds = GetTickCount();
38 now.tv_sec = milliseconds / 1000;
39 now.tv_usec = (milliseconds % 1000) * 1000;
40 return now;
41}
42
43#elif defined(HAVE_CLOCK_GETTIME_MONOTONIC)
44
45struct timeval tutil_tvnow(void)
46{
47 /*
48 ** clock_gettime() is granted to be increased monotonically when the
49 ** monotonic clock is queried. Time starting point is unspecified, it
50 ** could be the system start-up time, the Epoch, or something else,
51 ** in any case the time starting point does not change once that the
52 ** system has started up.
53 */
54 struct timeval now;
55 struct timespec tsnow;
56 if(0 == clock_gettime(CLOCK_MONOTONIC, &tsnow)) {
57 now.tv_sec = tsnow.tv_sec;
58 now.tv_usec = tsnow.tv_nsec / 1000;
59 }
60 /*
61 ** Even when the configure process has truly detected monotonic clock
62 ** availability, it might happen that it is not actually available at
63 ** run-time. When this occurs simply fallback to other time source.
64 */
65#ifdef HAVE_GETTIMEOFDAY
66 else
67 (void)gettimeofday(&now, NULL);
68#else
69 else {
70 now.tv_sec = (long)time(NULL);
71 now.tv_usec = 0;
72 }
73#endif
74 return now;
75}
76
77#elif defined(HAVE_GETTIMEOFDAY)
78
79struct timeval tutil_tvnow(void)
80{
81 /*
82 ** gettimeofday() is not granted to be increased monotonically, due to
83 ** clock drifting and external source time synchronization it can jump
84 ** forward or backward in time.
85 */
86 struct timeval now;
87 (void)gettimeofday(&now, NULL);
88 return now;
89}
90
91#else
92
93struct timeval tutil_tvnow(void)
94{
95 /*
96 ** time() returns the value of time in seconds since the Epoch.
97 */
98 struct timeval now;
99 now.tv_sec = (long)time(NULL);
100 now.tv_usec = 0;
101 return now;
102}
103
104#endif
105
106/*
107 * Make sure that the first argument is the more recent time, as otherwise
108 * we'll get a weird negative time-diff back...
109 *
110 * Returns: the time difference in number of milliseconds.
111 */
112long tutil_tvdiff(struct timeval newer, struct timeval older)
113{
114 return (long)(newer.tv_sec-older.tv_sec)*1000+
115 (long)(newer.tv_usec-older.tv_usec)/1000;
116}
117
118
119/*
120 * Same as tutil_tvdiff but with full usec resolution.
121 *
122 * Returns: the time difference in seconds with subsecond resolution.
123 */
124double tutil_tvdiff_secs(struct timeval newer, struct timeval older)
125{
126 if(newer.tv_sec != older.tv_sec)
127 return (double)(newer.tv_sec-older.tv_sec)+
128 (double)(newer.tv_usec-older.tv_usec)/1000000.0;
129 return (double)(newer.tv_usec-older.tv_usec)/1000000.0;
130}
131