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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