1 | /*************************************************************************** |
2 | * _ _ ____ _ |
3 | * Project ___| | | | _ \| | |
4 | * / __| | | | |_) | | |
5 | * | (__| |_| | _ <| |___ |
6 | * \___|\___/|_| \_\_____| |
7 | * |
8 | * Copyright (C) 1998 - 2022, Daniel Stenberg, <[email protected]>, 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 | |
63 | struct curltime Curl_now(void) |
64 | { |
65 | /* |
66 | ** clock_gettime() is granted to be increased monotonically when the |
67 | ** monotonic clock is queried. Time starting point is unspecified, it |
68 | ** could be the system start-up time, the Epoch, or something else, |
69 | ** in any case the time starting point does not change once that the |
70 | ** system has started up. |
71 | */ |
72 | #ifdef HAVE_GETTIMEOFDAY |
73 | struct timeval now; |
74 | #endif |
75 | struct curltime cnow; |
76 | struct timespec tsnow; |
77 | |
78 | /* |
79 | ** clock_gettime() may be defined by Apple's SDK as weak symbol thus |
80 | ** code compiles but fails during run-time if clock_gettime() is |
81 | ** called on unsupported OS version. |
82 | */ |
83 | #if defined(__APPLE__) && defined(HAVE_BUILTIN_AVAILABLE) && \ |
84 | (HAVE_BUILTIN_AVAILABLE == 1) |
85 | bool have_clock_gettime = FALSE; |
86 | if(__builtin_available(macOS 10.12, iOS 10, tvOS 10, watchOS 3, *)) |
87 | have_clock_gettime = TRUE; |
88 | #endif |
89 | |
90 | if( |
91 | #if defined(__APPLE__) && defined(HAVE_BUILTIN_AVAILABLE) && \ |
92 | (HAVE_BUILTIN_AVAILABLE == 1) |
93 | have_clock_gettime && |
94 | #endif |
95 | (0 == clock_gettime(CLOCK_MONOTONIC, &tsnow))) { |
96 | cnow.tv_sec = tsnow.tv_sec; |
97 | cnow.tv_usec = (unsigned int)(tsnow.tv_nsec / 1000); |
98 | } |
99 | /* |
100 | ** Even when the configure process has truly detected monotonic clock |
101 | ** availability, it might happen that it is not actually available at |
102 | ** run-time. When this occurs simply fallback to other time source. |
103 | */ |
104 | #ifdef HAVE_GETTIMEOFDAY |
105 | else { |
106 | (void)gettimeofday(&now, NULL); |
107 | cnow.tv_sec = now.tv_sec; |
108 | cnow.tv_usec = (unsigned int)now.tv_usec; |
109 | } |
110 | #else |
111 | else { |
112 | cnow.tv_sec = time(NULL); |
113 | cnow.tv_usec = 0; |
114 | } |
115 | #endif |
116 | return cnow; |
117 | } |
118 | |
119 | #elif defined(HAVE_MACH_ABSOLUTE_TIME) |
120 | |
121 | #include <stdint.h> |
122 | #include <mach/mach_time.h> |
123 | |
124 | struct curltime Curl_now(void) |
125 | { |
126 | /* |
127 | ** Monotonic timer on Mac OS is provided by mach_absolute_time(), which |
128 | ** returns time in Mach "absolute time units," which are platform-dependent. |
129 | ** To convert to nanoseconds, one must use conversion factors specified by |
130 | ** mach_timebase_info(). |
131 | */ |
132 | static mach_timebase_info_data_t timebase; |
133 | struct curltime cnow; |
134 | uint64_t usecs; |
135 | |
136 | if(0 == timebase.denom) |
137 | (void) mach_timebase_info(&timebase); |
138 | |
139 | usecs = mach_absolute_time(); |
140 | usecs *= timebase.numer; |
141 | usecs /= timebase.denom; |
142 | usecs /= 1000; |
143 | |
144 | cnow.tv_sec = usecs / 1000000; |
145 | cnow.tv_usec = (int)(usecs % 1000000); |
146 | |
147 | return cnow; |
148 | } |
149 | |
150 | #elif defined(HAVE_GETTIMEOFDAY) |
151 | |
152 | struct curltime Curl_now(void) |
153 | { |
154 | /* |
155 | ** gettimeofday() is not granted to be increased monotonically, due to |
156 | ** clock drifting and external source time synchronization it can jump |
157 | ** forward or backward in time. |
158 | */ |
159 | struct timeval now; |
160 | struct curltime ret; |
161 | (void)gettimeofday(&now, NULL); |
162 | ret.tv_sec = now.tv_sec; |
163 | ret.tv_usec = (int)now.tv_usec; |
164 | return ret; |
165 | } |
166 | |
167 | #else |
168 | |
169 | struct curltime Curl_now(void) |
170 | { |
171 | /* |
172 | ** time() returns the value of time in seconds since the Epoch. |
173 | */ |
174 | struct curltime now; |
175 | now.tv_sec = time(NULL); |
176 | now.tv_usec = 0; |
177 | return now; |
178 | } |
179 | |
180 | #endif |
181 | |
182 | /* |
183 | * Returns: time difference in number of milliseconds. For too large diffs it |
184 | * returns max value. |
185 | * |
186 | * @unittest: 1323 |
187 | */ |
188 | timediff_t Curl_timediff(struct curltime newer, struct curltime older) |
189 | { |
190 | timediff_t diff = (timediff_t)newer.tv_sec-older.tv_sec; |
191 | if(diff >= (TIMEDIFF_T_MAX/1000)) |
192 | return TIMEDIFF_T_MAX; |
193 | else if(diff <= (TIMEDIFF_T_MIN/1000)) |
194 | return TIMEDIFF_T_MIN; |
195 | return diff * 1000 + (newer.tv_usec-older.tv_usec)/1000; |
196 | } |
197 | |
198 | /* |
199 | * Returns: time difference in number of microseconds. For too large diffs it |
200 | * returns max value. |
201 | */ |
202 | timediff_t Curl_timediff_us(struct curltime newer, struct curltime older) |
203 | { |
204 | timediff_t diff = (timediff_t)newer.tv_sec-older.tv_sec; |
205 | if(diff >= (TIMEDIFF_T_MAX/1000000)) |
206 | return TIMEDIFF_T_MAX; |
207 | else if(diff <= (TIMEDIFF_T_MIN/1000000)) |
208 | return TIMEDIFF_T_MIN; |
209 | return diff * 1000000 + newer.tv_usec-older.tv_usec; |
210 | } |
211 | |