[337] | 1 | /***************************************************************************
|
---|
| 2 | * _ _ ____ _
|
---|
| 3 | * Project ___| | | | _ \| |
|
---|
| 4 | * / __| | | | |_) | |
|
---|
| 5 | * | (__| |_| | _ <| |___
|
---|
| 6 | * \___|\___/|_| \_\_____|
|
---|
| 7 | *
|
---|
| 8 | * Copyright (C) 1998 - 2017, 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 |
|
---|
| 23 | #include "timeval.h"
|
---|
| 24 |
|
---|
| 25 | #if defined(WIN32) && !defined(MSDOS)
|
---|
| 26 |
|
---|
| 27 | struct curltime Curl_now(void)
|
---|
| 28 | {
|
---|
| 29 | /*
|
---|
| 30 | ** GetTickCount() is available on _all_ Windows versions from W95 up
|
---|
| 31 | ** to nowadays. Returns milliseconds elapsed since last system boot,
|
---|
| 32 | ** increases monotonically and wraps once 49.7 days have elapsed.
|
---|
| 33 | */
|
---|
| 34 | struct curltime now;
|
---|
| 35 | #if !defined(_WIN32_WINNT) || !defined(_WIN32_WINNT_VISTA) || \
|
---|
| 36 | (_WIN32_WINNT < _WIN32_WINNT_VISTA)
|
---|
| 37 | DWORD milliseconds = GetTickCount();
|
---|
| 38 | now.tv_sec = milliseconds / 1000;
|
---|
| 39 | now.tv_usec = (milliseconds % 1000) * 1000;
|
---|
| 40 | #else
|
---|
| 41 | ULONGLONG milliseconds = GetTickCount64();
|
---|
| 42 | now.tv_sec = (time_t) (milliseconds / 1000);
|
---|
| 43 | now.tv_usec = (unsigned int) (milliseconds % 1000) * 1000;
|
---|
| 44 | #endif
|
---|
| 45 |
|
---|
| 46 | return now;
|
---|
| 47 | }
|
---|
| 48 |
|
---|
| 49 | #elif defined(HAVE_CLOCK_GETTIME_MONOTONIC)
|
---|
| 50 |
|
---|
| 51 | struct curltime Curl_now(void)
|
---|
| 52 | {
|
---|
| 53 | /*
|
---|
| 54 | ** clock_gettime() is granted to be increased monotonically when the
|
---|
| 55 | ** monotonic clock is queried. Time starting point is unspecified, it
|
---|
| 56 | ** could be the system start-up time, the Epoch, or something else,
|
---|
| 57 | ** in any case the time starting point does not change once that the
|
---|
| 58 | ** system has started up.
|
---|
| 59 | */
|
---|
| 60 | struct timeval now;
|
---|
| 61 | struct curltime cnow;
|
---|
| 62 | struct timespec tsnow;
|
---|
| 63 | if(0 == clock_gettime(CLOCK_MONOTONIC, &tsnow)) {
|
---|
| 64 | cnow.tv_sec = tsnow.tv_sec;
|
---|
| 65 | cnow.tv_usec = (unsigned int)(tsnow.tv_nsec / 1000);
|
---|
| 66 | }
|
---|
| 67 | /*
|
---|
| 68 | ** Even when the configure process has truly detected monotonic clock
|
---|
| 69 | ** availability, it might happen that it is not actually available at
|
---|
| 70 | ** run-time. When this occurs simply fallback to other time source.
|
---|
| 71 | */
|
---|
| 72 | #ifdef HAVE_GETTIMEOFDAY
|
---|
| 73 | else {
|
---|
| 74 | (void)gettimeofday(&now, NULL);
|
---|
| 75 | cnow.tv_sec = now.tv_sec;
|
---|
| 76 | cnow.tv_usec = (unsigned int)now.tv_usec;
|
---|
| 77 | }
|
---|
| 78 | #else
|
---|
| 79 | else {
|
---|
| 80 | cnow.tv_sec = time(NULL);
|
---|
| 81 | cnow.tv_usec = 0;
|
---|
| 82 | }
|
---|
| 83 | #endif
|
---|
| 84 | return cnow;
|
---|
| 85 | }
|
---|
| 86 |
|
---|
| 87 | #elif defined(HAVE_MACH_ABSOLUTE_TIME)
|
---|
| 88 |
|
---|
| 89 | #include <stdint.h>
|
---|
| 90 | #include <mach/mach_time.h>
|
---|
| 91 |
|
---|
| 92 | struct curltime Curl_now(void)
|
---|
| 93 | {
|
---|
| 94 | /*
|
---|
| 95 | ** Monotonic timer on Mac OS is provided by mach_absolute_time(), which
|
---|
| 96 | ** returns time in Mach "absolute time units," which are platform-dependent.
|
---|
| 97 | ** To convert to nanoseconds, one must use conversion factors specified by
|
---|
| 98 | ** mach_timebase_info().
|
---|
| 99 | */
|
---|
| 100 | static mach_timebase_info_data_t timebase;
|
---|
| 101 | struct curltime cnow;
|
---|
| 102 | uint64_t usecs;
|
---|
| 103 |
|
---|
| 104 | if(0 == timebase.denom)
|
---|
| 105 | (void) mach_timebase_info(&timebase);
|
---|
| 106 |
|
---|
| 107 | usecs = mach_absolute_time();
|
---|
| 108 | usecs *= timebase.numer;
|
---|
| 109 | usecs /= timebase.denom;
|
---|
| 110 | usecs /= 1000;
|
---|
| 111 |
|
---|
| 112 | cnow.tv_sec = usecs / 1000000;
|
---|
| 113 | cnow.tv_usec = usecs % 1000000;
|
---|
| 114 |
|
---|
| 115 | return cnow;
|
---|
| 116 | }
|
---|
| 117 |
|
---|
| 118 | #elif defined(HAVE_GETTIMEOFDAY)
|
---|
| 119 |
|
---|
| 120 | struct curltime Curl_now(void)
|
---|
| 121 | {
|
---|
| 122 | /*
|
---|
| 123 | ** gettimeofday() is not granted to be increased monotonically, due to
|
---|
| 124 | ** clock drifting and external source time synchronization it can jump
|
---|
| 125 | ** forward or backward in time.
|
---|
| 126 | */
|
---|
| 127 | struct timeval now;
|
---|
| 128 | struct curltime ret;
|
---|
| 129 | (void)gettimeofday(&now, NULL);
|
---|
| 130 | ret.tv_sec = now.tv_sec;
|
---|
| 131 | ret.tv_usec = now.tv_usec;
|
---|
| 132 | return ret;
|
---|
| 133 | }
|
---|
| 134 |
|
---|
| 135 | #else
|
---|
| 136 |
|
---|
| 137 | struct curltime Curl_now(void)
|
---|
| 138 | {
|
---|
| 139 | /*
|
---|
| 140 | ** time() returns the value of time in seconds since the Epoch.
|
---|
| 141 | */
|
---|
| 142 | struct curltime now;
|
---|
| 143 | now.tv_sec = time(NULL);
|
---|
| 144 | now.tv_usec = 0;
|
---|
| 145 | return now;
|
---|
| 146 | }
|
---|
| 147 |
|
---|
| 148 | #endif
|
---|
| 149 |
|
---|
| 150 | #if SIZEOF_TIME_T < 8
|
---|
| 151 | #define TIME_MAX INT_MAX
|
---|
| 152 | #define TIME_MIN INT_MIN
|
---|
| 153 | #else
|
---|
| 154 | #define TIME_MAX 9223372036854775807LL
|
---|
| 155 | #define TIME_MIN -9223372036854775807LL
|
---|
| 156 | #endif
|
---|
| 157 |
|
---|
| 158 | /*
|
---|
| 159 | * Returns: time difference in number of milliseconds. For too large diffs it
|
---|
| 160 | * returns max value.
|
---|
| 161 | *
|
---|
| 162 | * @unittest: 1323
|
---|
| 163 | */
|
---|
| 164 | timediff_t Curl_timediff(struct curltime newer, struct curltime older)
|
---|
| 165 | {
|
---|
| 166 | timediff_t diff = newer.tv_sec-older.tv_sec;
|
---|
| 167 | if(diff >= (TIME_MAX/1000))
|
---|
| 168 | return TIME_MAX;
|
---|
| 169 | else if(diff <= (TIME_MIN/1000))
|
---|
| 170 | return TIME_MIN;
|
---|
| 171 | return diff * 1000 + (newer.tv_usec-older.tv_usec)/1000;
|
---|
| 172 | }
|
---|
| 173 |
|
---|
| 174 | /*
|
---|
| 175 | * Returns: time difference in number of microseconds. For too large diffs it
|
---|
| 176 | * returns max value.
|
---|
| 177 | */
|
---|
| 178 | timediff_t Curl_timediff_us(struct curltime newer, struct curltime older)
|
---|
| 179 | {
|
---|
| 180 | timediff_t diff = newer.tv_sec-older.tv_sec;
|
---|
| 181 | if(diff >= (TIME_MAX/1000000))
|
---|
| 182 | return TIME_MAX;
|
---|
| 183 | else if(diff <= (TIME_MIN/1000000))
|
---|
| 184 | return TIME_MIN;
|
---|
| 185 | return diff * 1000000 + newer.tv_usec-older.tv_usec;
|
---|
| 186 | }
|
---|