1 /*************************************************************************** 2 * _ _ ____ _ 3 * Project ___| | | | _ \| | 4 * / __| | | | |_) | | 5 * | (__| |_| | _ <| |___ 6 * \___|\___/|_| \_\_____| 7 * 8 * Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel (at) 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 #include "tool_setup.h" 23 24 #include "tool_util.h" 25 26 #include "memdebug.h" /* keep this as LAST include */ 27 28 #if defined(WIN32) && !defined(MSDOS) 29 30 struct timeval tool_tvnow(void) 31 { 32 /* 33 ** GetTickCount() is available on _all_ Windows versions from W95 up 34 ** to nowadays. Returns milliseconds elapsed since last system boot, 35 ** increases monotonically and wraps once 49.7 days have elapsed. 36 ** 37 ** GetTickCount64() is available on Windows version from Windows Vista 38 ** and Windows Server 2008 up to nowadays. The resolution of the 39 ** function is limited to the resolution of the system timer, which 40 ** is typically in the range of 10 milliseconds to 16 milliseconds. 41 */ 42 struct timeval now; 43 #if defined(_WIN32_WINNT) && (_WIN32_WINNT >= 0x0600) 44 ULONGLONG milliseconds = GetTickCount64(); 45 #else 46 DWORD milliseconds = GetTickCount(); 47 #endif 48 now.tv_sec = (long)(milliseconds / 1000); 49 now.tv_usec = (milliseconds % 1000) * 1000; 50 return now; 51 } 52 53 #elif defined(HAVE_CLOCK_GETTIME_MONOTONIC) 54 55 struct timeval tool_tvnow(void) 56 { 57 /* 58 ** clock_gettime() is granted to be increased monotonically when the 59 ** monotonic clock is queried. Time starting point is unspecified, it 60 ** could be the system start-up time, the Epoch, or something else, 61 ** in any case the time starting point does not change once that the 62 ** system has started up. 63 */ 64 struct timeval now; 65 struct timespec tsnow; 66 if(0 == clock_gettime(CLOCK_MONOTONIC, &tsnow)) { 67 now.tv_sec = tsnow.tv_sec; 68 now.tv_usec = tsnow.tv_nsec / 1000; 69 } 70 /* 71 ** Even when the configure process has truly detected monotonic clock 72 ** availability, it might happen that it is not actually available at 73 ** run-time. When this occurs simply fallback to other time source. 74 */ 75 #ifdef HAVE_GETTIMEOFDAY 76 else 77 (void)gettimeofday(&now, NULL); 78 #else 79 else { 80 now.tv_sec = (long)time(NULL); 81 now.tv_usec = 0; 82 } 83 #endif 84 return now; 85 } 86 87 #elif defined(HAVE_GETTIMEOFDAY) 88 89 struct timeval tool_tvnow(void) 90 { 91 /* 92 ** gettimeofday() is not granted to be increased monotonically, due to 93 ** clock drifting and external source time synchronization it can jump 94 ** forward or backward in time. 95 */ 96 struct timeval now; 97 (void)gettimeofday(&now, NULL); 98 return now; 99 } 100 101 #else 102 103 struct timeval tool_tvnow(void) 104 { 105 /* 106 ** time() returns the value of time in seconds since the Epoch. 107 */ 108 struct timeval now; 109 now.tv_sec = (long)time(NULL); 110 now.tv_usec = 0; 111 return now; 112 } 113 114 #endif 115 116 /* 117 * Make sure that the first argument is the more recent time, as otherwise 118 * we'll get a weird negative time-diff back... 119 * 120 * Returns: the time difference in number of milliseconds. 121 */ 122 long tool_tvdiff(struct timeval newer, struct timeval older) 123 { 124 return (newer.tv_sec-older.tv_sec)*1000+ 125 (newer.tv_usec-older.tv_usec)/1000; 126 } 127 128 /* 129 * Same as tool_tvdiff but with full usec resolution. 130 * 131 * Returns: the time difference in seconds with subsecond resolution. 132 */ 133 double tool_tvdiff_secs(struct timeval newer, struct timeval older) 134 { 135 if(newer.tv_sec != older.tv_sec) 136 return (double)(newer.tv_sec-older.tv_sec)+ 137 (double)(newer.tv_usec-older.tv_usec)/1000000.0; 138 else 139 return (double)(newer.tv_usec-older.tv_usec)/1000000.0; 140 } 141 142 /* return the number of seconds in the given input timeval struct */ 143 long tool_tvlong(struct timeval t1) 144 { 145 return t1.tv_sec; 146 } 147 148