1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2017, 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 "tool_setup.h"
23
24 #include "tool_util.h"
25
26 #include "memdebug.h" /* keep this as LAST include */
27
28 #if defined(WIN32) && !defined(MSDOS)
29
tvnow(void)30 struct timeval tvnow(void)
31 {
32 /*
33 ** GetTickCount() is available on _all_ Windows versions from W95 up
34 ** to nowadays. Returns milliseconds elapsed since last system boot,
35 ** increases monotonically and wraps once 49.7 days have elapsed.
36 **
37 ** GetTickCount64() is available on Windows version from Windows Vista
38 ** and Windows Server 2008 up to nowadays. The resolution of the
39 ** function is limited to the resolution of the system timer, which
40 ** is typically in the range of 10 milliseconds to 16 milliseconds.
41 */
42 struct timeval now;
43 #if defined(_WIN32_WINNT) && (_WIN32_WINNT >= 0x0600) && \
44 (!defined(__MINGW32__) || defined(__MINGW64_VERSION_MAJOR))
45 ULONGLONG milliseconds = GetTickCount64();
46 #else
47 DWORD milliseconds = GetTickCount();
48 #endif
49 now.tv_sec = (long)(milliseconds / 1000);
50 now.tv_usec = (long)((milliseconds % 1000) * 1000);
51 return now;
52 }
53
54 #elif defined(HAVE_CLOCK_GETTIME_MONOTONIC)
55
tvnow(void)56 struct timeval tvnow(void)
57 {
58 /*
59 ** clock_gettime() is granted to be increased monotonically when the
60 ** monotonic clock is queried. Time starting point is unspecified, it
61 ** could be the system start-up time, the Epoch, or something else,
62 ** in any case the time starting point does not change once that the
63 ** system has started up.
64 */
65 struct timeval now;
66 struct timespec tsnow;
67 if(0 == clock_gettime(CLOCK_MONOTONIC, &tsnow)) {
68 now.tv_sec = tsnow.tv_sec;
69 now.tv_usec = tsnow.tv_nsec / 1000;
70 }
71 /*
72 ** Even when the configure process has truly detected monotonic clock
73 ** availability, it might happen that it is not actually available at
74 ** run-time. When this occurs simply fallback to other time source.
75 */
76 #ifdef HAVE_GETTIMEOFDAY
77 else
78 (void)gettimeofday(&now, NULL);
79 #else
80 else {
81 now.tv_sec = (long)time(NULL);
82 now.tv_usec = 0;
83 }
84 #endif
85 return now;
86 }
87
88 #elif defined(HAVE_GETTIMEOFDAY)
89
tvnow(void)90 struct timeval tvnow(void)
91 {
92 /*
93 ** gettimeofday() is not granted to be increased monotonically, due to
94 ** clock drifting and external source time synchronization it can jump
95 ** forward or backward in time.
96 */
97 struct timeval now;
98 (void)gettimeofday(&now, NULL);
99 return now;
100 }
101
102 #else
103
tvnow(void)104 struct timeval tvnow(void)
105 {
106 /*
107 ** time() returns the value of time in seconds since the Epoch.
108 */
109 struct timeval now;
110 now.tv_sec = (long)time(NULL);
111 now.tv_usec = 0;
112 return now;
113 }
114
115 #endif
116
117 /*
118 * Make sure that the first argument is the more recent time, as otherwise
119 * we'll get a weird negative time-diff back...
120 *
121 * Returns: the time difference in number of milliseconds.
122 */
tvdiff(struct timeval newer,struct timeval older)123 long tvdiff(struct timeval newer, struct timeval older)
124 {
125 return (long)(newer.tv_sec-older.tv_sec)*1000+
126 (long)(newer.tv_usec-older.tv_usec)/1000;
127 }
128