[331] | 1 | /***************************************************************************
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| 2 | * _ _ ____ _
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| 3 | * Project ___| | | | _ \| |
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| 4 | * / __| | | | |_) | |
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| 5 | * | (__| |_| | _ <| |___
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| 6 | * \___|\___/|_| \_\_____|
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| 7 | *
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| 8 | * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
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| 9 | *
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| 10 | * This software is licensed as described in the file COPYING, which
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| 11 | * you should have received as part of this distribution. The terms
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| 12 | * are also available at https://curl.haxx.se/docs/copyright.html.
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| 13 | *
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| 14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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| 15 | * copies of the Software, and permit persons to whom the Software is
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| 16 | * furnished to do so, under the terms of the COPYING file.
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| 17 | *
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| 18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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| 19 | * KIND, either express or implied.
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| 20 | *
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| 21 | ***************************************************************************/
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| 22 | #include "tool_setup.h"
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| 23 |
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| 24 | #include "tool_util.h"
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| 25 |
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| 26 | #include "memdebug.h" /* keep this as LAST include */
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| 27 |
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| 28 | #if defined(WIN32) && !defined(MSDOS)
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| 29 |
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| 30 | struct timeval tvnow(void)
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| 31 | {
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| 32 | /*
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| 33 | ** GetTickCount() is available on _all_ Windows versions from W95 up
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| 34 | ** to nowadays. Returns milliseconds elapsed since last system boot,
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| 35 | ** increases monotonically and wraps once 49.7 days have elapsed.
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| 36 | **
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| 37 | ** GetTickCount64() is available on Windows version from Windows Vista
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| 38 | ** and Windows Server 2008 up to nowadays. The resolution of the
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| 39 | ** function is limited to the resolution of the system timer, which
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| 40 | ** is typically in the range of 10 milliseconds to 16 milliseconds.
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| 41 | */
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| 42 | struct timeval now;
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| 43 | #if defined(_WIN32_WINNT) && (_WIN32_WINNT >= 0x0600)
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| 44 | ULONGLONG milliseconds = GetTickCount64();
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| 45 | #else
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| 46 | DWORD milliseconds = GetTickCount();
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| 47 | #endif
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| 48 | now.tv_sec = (long)(milliseconds / 1000);
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| 49 | now.tv_usec = (milliseconds % 1000) * 1000;
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| 50 | return now;
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| 51 | }
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| 52 |
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| 53 | #elif defined(HAVE_CLOCK_GETTIME_MONOTONIC)
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| 54 |
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| 55 | struct timeval tvnow(void)
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| 56 | {
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| 57 | /*
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| 58 | ** clock_gettime() is granted to be increased monotonically when the
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| 59 | ** monotonic clock is queried. Time starting point is unspecified, it
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| 60 | ** could be the system start-up time, the Epoch, or something else,
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| 61 | ** in any case the time starting point does not change once that the
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| 62 | ** system has started up.
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| 63 | */
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| 64 | struct timeval now;
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| 65 | struct timespec tsnow;
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| 66 | if(0 == clock_gettime(CLOCK_MONOTONIC, &tsnow)) {
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| 67 | now.tv_sec = tsnow.tv_sec;
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| 68 | now.tv_usec = tsnow.tv_nsec / 1000;
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| 69 | }
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| 70 | /*
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| 71 | ** Even when the configure process has truly detected monotonic clock
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| 72 | ** availability, it might happen that it is not actually available at
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| 73 | ** run-time. When this occurs simply fallback to other time source.
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| 74 | */
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| 75 | #ifdef HAVE_GETTIMEOFDAY
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| 76 | else
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| 77 | (void)gettimeofday(&now, NULL);
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| 78 | #else
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| 79 | else {
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| 80 | now.tv_sec = (long)time(NULL);
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| 81 | now.tv_usec = 0;
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| 82 | }
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| 83 | #endif
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| 84 | return now;
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| 85 | }
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| 86 |
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| 87 | #elif defined(HAVE_GETTIMEOFDAY)
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| 88 |
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| 89 | struct timeval tvnow(void)
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| 90 | {
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| 91 | /*
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| 92 | ** gettimeofday() is not granted to be increased monotonically, due to
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| 93 | ** clock drifting and external source time synchronization it can jump
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| 94 | ** forward or backward in time.
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| 95 | */
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| 96 | struct timeval now;
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| 97 | (void)gettimeofday(&now, NULL);
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| 98 | return now;
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| 99 | }
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| 100 |
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| 101 | #else
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| 102 |
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| 103 | struct timeval tvnow(void)
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| 104 | {
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| 105 | /*
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| 106 | ** time() returns the value of time in seconds since the Epoch.
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| 107 | */
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| 108 | struct timeval now;
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| 109 | now.tv_sec = (long)time(NULL);
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| 110 | now.tv_usec = 0;
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| 111 | return now;
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| 112 | }
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| 113 |
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| 114 | #endif
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| 115 |
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| 116 | /*
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| 117 | * Make sure that the first argument is the more recent time, as otherwise
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| 118 | * we'll get a weird negative time-diff back...
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| 119 | *
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| 120 | * Returns: the time difference in number of milliseconds.
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| 121 | */
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| 122 | long tvdiff(struct timeval newer, struct timeval older)
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| 123 | {
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| 124 | return (long)(newer.tv_sec-older.tv_sec)*1000+
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| 125 | (long)(newer.tv_usec-older.tv_usec)/1000;
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| 126 | }
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