1/***************************************************************************
2 *                                  _   _ ____  _
3 *  Project                     ___| | | |  _ \| |
4 *                             / __| | | | |_) | |
5 *                            | (__| |_| |  _ <| |___
6 *                             \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2012, 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 http://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
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 (newer.tv_sec-older.tv_sec)*1000+
115    (newer.tv_usec-older.tv_usec)/1000;
116}
117
118/*
119 * Same as tutil_tvdiff but with full usec resolution.
120 *
121 * Returns: the time difference in seconds with subsecond resolution.
122 */
123double tutil_tvdiff_secs(struct timeval newer, struct timeval older)
124{
125  if(newer.tv_sec != older.tv_sec)
126    return (double)(newer.tv_sec-older.tv_sec)+
127      (double)(newer.tv_usec-older.tv_usec)/1000000.0;
128  else
129    return (double)(newer.tv_usec-older.tv_usec)/1000000.0;
130}
131
132/* return the number of seconds in the given input timeval struct */
133long tutil_tvlong(struct timeval t1)
134{
135  return t1.tv_sec;
136}
137
138