1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
#include "timeval.h"
#if defined(WIN32) && !defined(MSDOS)
struct curltime curlx_tvnow(void)
{
/*
** GetTickCount() is available on _all_ Windows versions from W95 up
** to nowadays. Returns milliseconds elapsed since last system boot,
** increases monotonically and wraps once 49.7 days have elapsed.
*/
struct curltime now;
#if !defined(_WIN32_WINNT) || !defined(_WIN32_WINNT_VISTA) || \
(_WIN32_WINNT < _WIN32_WINNT_VISTA)
DWORD milliseconds = GetTickCount();
now.tv_sec = milliseconds / 1000;
now.tv_usec = (milliseconds % 1000) * 1000;
#else
ULONGLONG milliseconds = GetTickCount64();
now.tv_sec = (time_t) (milliseconds / 1000);
now.tv_usec = (unsigned int) (milliseconds % 1000) * 1000;
#endif
return now;
}
#elif defined(HAVE_CLOCK_GETTIME_MONOTONIC)
struct curltime curlx_tvnow(void)
{
/*
** clock_gettime() is granted to be increased monotonically when the
** monotonic clock is queried. Time starting point is unspecified, it
** could be the system start-up time, the Epoch, or something else,
** in any case the time starting point does not change once that the
** system has started up.
*/
struct timeval now;
struct curltime cnow;
struct timespec tsnow;
if(0 == clock_gettime(CLOCK_MONOTONIC, &tsnow)) {
cnow.tv_sec = tsnow.tv_sec;
cnow.tv_usec = (unsigned int)(tsnow.tv_nsec / 1000);
}
/*
** Even when the configure process has truly detected monotonic clock
** availability, it might happen that it is not actually available at
** run-time. When this occurs simply fallback to other time source.
*/
#ifdef HAVE_GETTIMEOFDAY
else {
(void)gettimeofday(&now, NULL);
cnow.tv_sec = now.tv_sec;
cnow.tv_usec = (unsigned int)now.tv_usec;
}
#else
else {
cnow.tv_sec = time(NULL);
cnow.tv_usec = 0;
}
#endif
return cnow;
}
#elif defined(HAVE_GETTIMEOFDAY)
struct curltime curlx_tvnow(void)
{
/*
** gettimeofday() is not granted to be increased monotonically, due to
** clock drifting and external source time synchronization it can jump
** forward or backward in time.
*/
struct timeval now;
struct curltime ret;
(void)gettimeofday(&now, NULL);
ret.tv_sec = now.tv_sec;
ret.tv_usec = now.tv_usec;
return ret;
}
#else
struct curltime curlx_tvnow(void)
{
/*
** time() returns the value of time in seconds since the Epoch.
*/
struct curltime now;
now.tv_sec = time(NULL);
now.tv_usec = 0;
return now;
}
#endif
/*
* Make sure that the first argument is the more recent time, as otherwise
* we'll get a weird negative time-diff back...
*
* Returns: the time difference in number of milliseconds. For large diffs it
* returns 0x7fffffff on 32bit time_t systems.
*
* @unittest: 1323
*/
time_t curlx_tvdiff(struct curltime newer, struct curltime older)
{
#if SIZEOF_TIME_T < 8
/* for 32bit time_t systems, add a precaution to avoid overflow for really
big time differences */
time_t diff = newer.tv_sec-older.tv_sec;
if(diff >= (0x7fffffff/1000))
return 0x7fffffff;
#endif
return (newer.tv_sec-older.tv_sec)*1000+
(int)(newer.tv_usec-older.tv_usec)/1000;
}
/*
* Make sure that the first argument is the more recent time, as otherwise
* we'll get a weird negative time-diff back...
*
* Returns: the time difference in number of microseconds. For too large diffs
* it returns max value.
*/
time_t Curl_tvdiff_us(struct curltime newer, struct curltime older)
{
time_t diff = newer.tv_sec-older.tv_sec;
#if SIZEOF_TIME_T < 8
/* for 32bit time_t systems */
if(diff >= (0x7fffffff/1000000))
return 0x7fffffff;
#else
/* for 64bit time_t systems */
if(diff >= (0x7fffffffffffffffLL/1000000))
return 0x7fffffffffffffffLL;
#endif
return (newer.tv_sec-older.tv_sec)*1000000+
(int)(newer.tv_usec-older.tv_usec);
}
|
