1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2014, 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
tool_tvnow(void)30 struct timeval tool_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 ULONGLONG milliseconds = GetTickCount64();
45 #else
46 DWORD milliseconds = GetTickCount();
47 #endif
48 now.tv_sec = (long)(milliseconds / 1000);
49 now.tv_usec = (milliseconds % 1000) * 1000;
50 return now;
51 }
52
53 #elif defined(HAVE_CLOCK_GETTIME_MONOTONIC)
54
tool_tvnow(void)55 struct timeval tool_tvnow(void)
56 {
57 /*
58 ** clock_gettime() is granted to be increased monotonically when the
59 ** monotonic clock is queried. Time starting point is unspecified, it
60 ** could be the system start-up time, the Epoch, or something else,
61 ** in any case the time starting point does not change once that the
62 ** system has started up.
63 */
64 struct timeval now;
65 struct timespec tsnow;
66 if(0 == clock_gettime(CLOCK_MONOTONIC, &tsnow)) {
67 now.tv_sec = tsnow.tv_sec;
68 now.tv_usec = tsnow.tv_nsec / 1000;
69 }
70 /*
71 ** Even when the configure process has truly detected monotonic clock
72 ** availability, it might happen that it is not actually available at
73 ** run-time. When this occurs simply fallback to other time source.
74 */
75 #ifdef HAVE_GETTIMEOFDAY
76 else
77 (void)gettimeofday(&now, NULL);
78 #else
79 else {
80 now.tv_sec = (long)time(NULL);
81 now.tv_usec = 0;
82 }
83 #endif
84 return now;
85 }
86
87 #elif defined(HAVE_GETTIMEOFDAY)
88
tool_tvnow(void)89 struct timeval tool_tvnow(void)
90 {
91 /*
92 ** gettimeofday() is not granted to be increased monotonically, due to
93 ** clock drifting and external source time synchronization it can jump
94 ** forward or backward in time.
95 */
96 struct timeval now;
97 (void)gettimeofday(&now, NULL);
98 return now;
99 }
100
101 #else
102
tool_tvnow(void)103 struct timeval tool_tvnow(void)
104 {
105 /*
106 ** time() returns the value of time in seconds since the Epoch.
107 */
108 struct timeval now;
109 now.tv_sec = (long)time(NULL);
110 now.tv_usec = 0;
111 return now;
112 }
113
114 #endif
115
116 /*
117 * Make sure that the first argument is the more recent time, as otherwise
118 * we'll get a weird negative time-diff back...
119 *
120 * Returns: the time difference in number of milliseconds.
121 */
tool_tvdiff(struct timeval newer,struct timeval older)122 long tool_tvdiff(struct timeval newer, struct timeval older)
123 {
124 return (newer.tv_sec-older.tv_sec)*1000+
125 (newer.tv_usec-older.tv_usec)/1000;
126 }
127
128 /*
129 * Same as tool_tvdiff but with full usec resolution.
130 *
131 * Returns: the time difference in seconds with subsecond resolution.
132 */
tool_tvdiff_secs(struct timeval newer,struct timeval older)133 double tool_tvdiff_secs(struct timeval newer, struct timeval older)
134 {
135 if(newer.tv_sec != older.tv_sec)
136 return (double)(newer.tv_sec-older.tv_sec)+
137 (double)(newer.tv_usec-older.tv_usec)/1000000.0;
138 else
139 return (double)(newer.tv_usec-older.tv_usec)/1000000.0;
140 }
141
142 /* return the number of seconds in the given input timeval struct */
tool_tvlong(struct timeval t1)143 long tool_tvlong(struct timeval t1)
144 {
145 return t1.tv_sec;
146 }
147
148