/proc/self/cwd/external/curl/lib/timeval.c
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1 | | /*************************************************************************** |
2 | | * _ _ ____ _ |
3 | | * Project ___| | | | _ \| | |
4 | | * / __| | | | |_) | | |
5 | | * | (__| |_| | _ <| |___ |
6 | | * \___|\___/|_| \_\_____| |
7 | | * |
8 | | * Copyright (C) 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.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 | | * SPDX-License-Identifier: curl |
22 | | * |
23 | | ***************************************************************************/ |
24 | | |
25 | | #include "timeval.h" |
26 | | |
27 | | #if defined(WIN32) && !defined(MSDOS) |
28 | | |
29 | | /* set in win32_init() */ |
30 | | extern LARGE_INTEGER Curl_freq; |
31 | | extern bool Curl_isVistaOrGreater; |
32 | | |
33 | | /* In case of bug fix this function has a counterpart in tool_util.c */ |
34 | | struct curltime Curl_now(void) |
35 | | { |
36 | | struct curltime now; |
37 | | if(Curl_isVistaOrGreater) { /* QPC timer might have issues pre-Vista */ |
38 | | LARGE_INTEGER count; |
39 | | QueryPerformanceCounter(&count); |
40 | | now.tv_sec = (time_t)(count.QuadPart / Curl_freq.QuadPart); |
41 | | now.tv_usec = (int)((count.QuadPart % Curl_freq.QuadPart) * 1000000 / |
42 | | Curl_freq.QuadPart); |
43 | | } |
44 | | else { |
45 | | /* Disable /analyze warning that GetTickCount64 is preferred */ |
46 | | #if defined(_MSC_VER) |
47 | | #pragma warning(push) |
48 | | #pragma warning(disable:28159) |
49 | | #endif |
50 | | DWORD milliseconds = GetTickCount(); |
51 | | #if defined(_MSC_VER) |
52 | | #pragma warning(pop) |
53 | | #endif |
54 | | |
55 | | now.tv_sec = milliseconds / 1000; |
56 | | now.tv_usec = (milliseconds % 1000) * 1000; |
57 | | } |
58 | | return now; |
59 | | } |
60 | | |
61 | | #elif defined(HAVE_CLOCK_GETTIME_MONOTONIC) || \ |
62 | | defined(HAVE_CLOCK_GETTIME_MONOTONIC_RAW) |
63 | | |
64 | | struct curltime Curl_now(void) |
65 | 0 | { |
66 | | /* |
67 | | ** clock_gettime() is granted to be increased monotonically when the |
68 | | ** monotonic clock is queried. Time starting point is unspecified, it |
69 | | ** could be the system start-up time, the Epoch, or something else, |
70 | | ** in any case the time starting point does not change once that the |
71 | | ** system has started up. |
72 | | */ |
73 | 0 | #ifdef HAVE_GETTIMEOFDAY |
74 | 0 | struct timeval now; |
75 | 0 | #endif |
76 | 0 | struct curltime cnow; |
77 | 0 | struct timespec tsnow; |
78 | | |
79 | | /* |
80 | | ** clock_gettime() may be defined by Apple's SDK as weak symbol thus |
81 | | ** code compiles but fails during run-time if clock_gettime() is |
82 | | ** called on unsupported OS version. |
83 | | */ |
84 | | #if defined(__APPLE__) && defined(HAVE_BUILTIN_AVAILABLE) && \ |
85 | | (HAVE_BUILTIN_AVAILABLE == 1) |
86 | | bool have_clock_gettime = FALSE; |
87 | | if(__builtin_available(macOS 10.12, iOS 10, tvOS 10, watchOS 3, *)) |
88 | | have_clock_gettime = TRUE; |
89 | | #endif |
90 | |
|
91 | | #ifdef HAVE_CLOCK_GETTIME_MONOTONIC_RAW |
92 | | if( |
93 | | #if defined(__APPLE__) && defined(HAVE_BUILTIN_AVAILABLE) && \ |
94 | | (HAVE_BUILTIN_AVAILABLE == 1) |
95 | | have_clock_gettime && |
96 | | #endif |
97 | | (0 == clock_gettime(CLOCK_MONOTONIC_RAW, &tsnow))) { |
98 | | cnow.tv_sec = tsnow.tv_sec; |
99 | | cnow.tv_usec = (unsigned int)(tsnow.tv_nsec / 1000); |
100 | | } |
101 | | else |
102 | | #endif |
103 | |
|
104 | 0 | if( |
105 | | #if defined(__APPLE__) && defined(HAVE_BUILTIN_AVAILABLE) && \ |
106 | | (HAVE_BUILTIN_AVAILABLE == 1) |
107 | | have_clock_gettime && |
108 | | #endif |
109 | 0 | (0 == clock_gettime(CLOCK_MONOTONIC, &tsnow))) { |
110 | 0 | cnow.tv_sec = tsnow.tv_sec; |
111 | 0 | cnow.tv_usec = (unsigned int)(tsnow.tv_nsec / 1000); |
112 | 0 | } |
113 | | /* |
114 | | ** Even when the configure process has truly detected monotonic clock |
115 | | ** availability, it might happen that it is not actually available at |
116 | | ** run-time. When this occurs simply fallback to other time source. |
117 | | */ |
118 | 0 | #ifdef HAVE_GETTIMEOFDAY |
119 | 0 | else { |
120 | 0 | (void)gettimeofday(&now, NULL); |
121 | 0 | cnow.tv_sec = now.tv_sec; |
122 | 0 | cnow.tv_usec = (unsigned int)now.tv_usec; |
123 | 0 | } |
124 | | #else |
125 | | else { |
126 | | cnow.tv_sec = time(NULL); |
127 | | cnow.tv_usec = 0; |
128 | | } |
129 | | #endif |
130 | 0 | return cnow; |
131 | 0 | } |
132 | | |
133 | | #elif defined(HAVE_MACH_ABSOLUTE_TIME) |
134 | | |
135 | | #include <stdint.h> |
136 | | #include <mach/mach_time.h> |
137 | | |
138 | | struct curltime Curl_now(void) |
139 | | { |
140 | | /* |
141 | | ** Monotonic timer on Mac OS is provided by mach_absolute_time(), which |
142 | | ** returns time in Mach "absolute time units," which are platform-dependent. |
143 | | ** To convert to nanoseconds, one must use conversion factors specified by |
144 | | ** mach_timebase_info(). |
145 | | */ |
146 | | static mach_timebase_info_data_t timebase; |
147 | | struct curltime cnow; |
148 | | uint64_t usecs; |
149 | | |
150 | | if(0 == timebase.denom) |
151 | | (void) mach_timebase_info(&timebase); |
152 | | |
153 | | usecs = mach_absolute_time(); |
154 | | usecs *= timebase.numer; |
155 | | usecs /= timebase.denom; |
156 | | usecs /= 1000; |
157 | | |
158 | | cnow.tv_sec = usecs / 1000000; |
159 | | cnow.tv_usec = (int)(usecs % 1000000); |
160 | | |
161 | | return cnow; |
162 | | } |
163 | | |
164 | | #elif defined(HAVE_GETTIMEOFDAY) |
165 | | |
166 | | struct curltime Curl_now(void) |
167 | | { |
168 | | /* |
169 | | ** gettimeofday() is not granted to be increased monotonically, due to |
170 | | ** clock drifting and external source time synchronization it can jump |
171 | | ** forward or backward in time. |
172 | | */ |
173 | | struct timeval now; |
174 | | struct curltime ret; |
175 | | (void)gettimeofday(&now, NULL); |
176 | | ret.tv_sec = now.tv_sec; |
177 | | ret.tv_usec = (int)now.tv_usec; |
178 | | return ret; |
179 | | } |
180 | | |
181 | | #else |
182 | | |
183 | | struct curltime Curl_now(void) |
184 | | { |
185 | | /* |
186 | | ** time() returns the value of time in seconds since the Epoch. |
187 | | */ |
188 | | struct curltime now; |
189 | | now.tv_sec = time(NULL); |
190 | | now.tv_usec = 0; |
191 | | return now; |
192 | | } |
193 | | |
194 | | #endif |
195 | | |
196 | | /* |
197 | | * Returns: time difference in number of milliseconds. For too large diffs it |
198 | | * returns max value. |
199 | | * |
200 | | * @unittest: 1323 |
201 | | */ |
202 | | timediff_t Curl_timediff(struct curltime newer, struct curltime older) |
203 | 0 | { |
204 | 0 | timediff_t diff = (timediff_t)newer.tv_sec-older.tv_sec; |
205 | 0 | if(diff >= (TIMEDIFF_T_MAX/1000)) |
206 | 0 | return TIMEDIFF_T_MAX; |
207 | 0 | else if(diff <= (TIMEDIFF_T_MIN/1000)) |
208 | 0 | return TIMEDIFF_T_MIN; |
209 | 0 | return diff * 1000 + (newer.tv_usec-older.tv_usec)/1000; |
210 | 0 | } |
211 | | |
212 | | /* |
213 | | * Returns: time difference in number of milliseconds, rounded up. |
214 | | * For too large diffs it returns max value. |
215 | | */ |
216 | | timediff_t Curl_timediff_ceil(struct curltime newer, struct curltime older) |
217 | 0 | { |
218 | 0 | timediff_t diff = (timediff_t)newer.tv_sec-older.tv_sec; |
219 | 0 | if(diff >= (TIMEDIFF_T_MAX/1000)) |
220 | 0 | return TIMEDIFF_T_MAX; |
221 | 0 | else if(diff <= (TIMEDIFF_T_MIN/1000)) |
222 | 0 | return TIMEDIFF_T_MIN; |
223 | 0 | return diff * 1000 + (newer.tv_usec - older.tv_usec + 999)/1000; |
224 | 0 | } |
225 | | |
226 | | /* |
227 | | * Returns: time difference in number of microseconds. For too large diffs it |
228 | | * returns max value. |
229 | | */ |
230 | | timediff_t Curl_timediff_us(struct curltime newer, struct curltime older) |
231 | 0 | { |
232 | 0 | timediff_t diff = (timediff_t)newer.tv_sec-older.tv_sec; |
233 | 0 | if(diff >= (TIMEDIFF_T_MAX/1000000)) |
234 | 0 | return TIMEDIFF_T_MAX; |
235 | 0 | else if(diff <= (TIMEDIFF_T_MIN/1000000)) |
236 | 0 | return TIMEDIFF_T_MIN; |
237 | 0 | return diff * 1000000 + newer.tv_usec-older.tv_usec; |
238 | 0 | } |