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
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
|
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2019, 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"
#include "system_win32.h"
#if defined(WIN32) && !defined(MSDOS)
struct curltime Curl_now(void)
{
struct curltime now;
static LARGE_INTEGER freq;
static int isVistaOrGreater = -1;
if(isVistaOrGreater == -1) {
if(Curl_verify_windows_version(6, 0, PLATFORM_WINNT,
VERSION_GREATER_THAN_EQUAL)) {
isVistaOrGreater = 1;
QueryPerformanceFrequency(&freq);
}
else
isVistaOrGreater = 0;
}
if(isVistaOrGreater == 1) { /* QPC timer might have issues pre-Vista */
LARGE_INTEGER count;
QueryPerformanceCounter(&count);
now.tv_sec = (time_t)(count.QuadPart / freq.QuadPart);
now.tv_usec =
(int)((count.QuadPart % freq.QuadPart) * 1000000 / freq.QuadPart);
}
else {
/* Disable /analyze warning that GetTickCount64 is preferred */
#if defined(_MSC_VER)
#pragma warning(push)
#pragma warning(disable:28159)
#endif
DWORD milliseconds = GetTickCount();
#if defined(_MSC_VER)
#pragma warning(pop)
#endif
now.tv_sec = milliseconds / 1000;
now.tv_usec = (milliseconds % 1000) * 1000;
}
return now;
}
#elif defined(HAVE_CLOCK_GETTIME_MONOTONIC)
struct curltime Curl_now(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;
/*
** clock_gettime() may be defined by Apple's SDK as weak symbol thus
** code compiles but fails during run-time if clock_gettime() is
** called on unsupported OS version.
*/
#if defined(__APPLE__) && (HAVE_BUILTIN_AVAILABLE == 1)
bool have_clock_gettime = FALSE;
if(__builtin_available(macOS 10.12, iOS 10, tvOS 10, watchOS 3, *))
have_clock_gettime = TRUE;
#endif
if(
#if defined(__APPLE__) && (HAVE_BUILTIN_AVAILABLE == 1)
have_clock_gettime &&
#endif
(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_MACH_ABSOLUTE_TIME)
#include <stdint.h>
#include <mach/mach_time.h>
struct curltime Curl_now(void)
{
/*
** Monotonic timer on Mac OS is provided by mach_absolute_time(), which
** returns time in Mach "absolute time units," which are platform-dependent.
** To convert to nanoseconds, one must use conversion factors specified by
** mach_timebase_info().
*/
static mach_timebase_info_data_t timebase;
struct curltime cnow;
uint64_t usecs;
if(0 == timebase.denom)
(void) mach_timebase_info(&timebase);
usecs = mach_absolute_time();
usecs *= timebase.numer;
usecs /= timebase.denom;
usecs /= 1000;
cnow.tv_sec = usecs / 1000000;
cnow.tv_usec = (int)(usecs % 1000000);
return cnow;
}
#elif defined(HAVE_GETTIMEOFDAY)
struct curltime Curl_now(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 = (int)now.tv_usec;
return ret;
}
#else
struct curltime Curl_now(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
#if SIZEOF_TIME_T < 8
#define TIME_MAX INT_MAX
#define TIME_MIN INT_MIN
#else
#define TIME_MAX 9223372036854775807LL
#define TIME_MIN -9223372036854775807LL
#endif
/*
* Returns: time difference in number of milliseconds. For too large diffs it
* returns max value.
*
* @unittest: 1323
*/
timediff_t Curl_timediff(struct curltime newer, struct curltime older)
{
timediff_t diff = (timediff_t)newer.tv_sec-older.tv_sec;
if(diff >= (TIME_MAX/1000))
return TIME_MAX;
else if(diff <= (TIME_MIN/1000))
return TIME_MIN;
return diff * 1000 + (newer.tv_usec-older.tv_usec)/1000;
}
/*
* Returns: time difference in number of microseconds. For too large diffs it
* returns max value.
*/
timediff_t Curl_timediff_us(struct curltime newer, struct curltime older)
{
timediff_t diff = (timediff_t)newer.tv_sec-older.tv_sec;
if(diff >= (TIME_MAX/1000000))
return TIME_MAX;
else if(diff <= (TIME_MIN/1000000))
return TIME_MIN;
return diff * 1000000 + newer.tv_usec-older.tv_usec;
}
|
