1/*************************************************************************** 2 * _ _ ____ _ 3 * Project ___| | | | _ \| | 4 * / __| | | | |_) | | 5 * | (__| |_| | _ <| |___ 6 * \___|\___/|_| \_\_____| 7 * 8 * Copyright (C) 1998 - 2012, 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 http://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 "curl_setup.h" 23 24#include "testutil.h" 25#include "memdebug.h" 26 27#if defined(WIN32) && !defined(MSDOS) 28 29struct timeval tutil_tvnow(void) 30{ 31 /* 32 ** GetTickCount() is available on _all_ Windows versions from W95 up 33 ** to nowadays. Returns milliseconds elapsed since last system boot, 34 ** increases monotonically and wraps once 49.7 days have elapsed. 35 */ 36 struct timeval now; 37 DWORD milliseconds = GetTickCount(); 38 now.tv_sec = milliseconds / 1000; 39 now.tv_usec = (milliseconds % 1000) * 1000; 40 return now; 41} 42 43#elif defined(HAVE_CLOCK_GETTIME_MONOTONIC) 44 45struct timeval tutil_tvnow(void) 46{ 47 /* 48 ** clock_gettime() is granted to be increased monotonically when the 49 ** monotonic clock is queried. Time starting point is unspecified, it 50 ** could be the system start-up time, the Epoch, or something else, 51 ** in any case the time starting point does not change once that the 52 ** system has started up. 53 */ 54 struct timeval now; 55 struct timespec tsnow; 56 if(0 == clock_gettime(CLOCK_MONOTONIC, &tsnow)) { 57 now.tv_sec = tsnow.tv_sec; 58 now.tv_usec = tsnow.tv_nsec / 1000; 59 } 60 /* 61 ** Even when the configure process has truly detected monotonic clock 62 ** availability, it might happen that it is not actually available at 63 ** run-time. When this occurs simply fallback to other time source. 64 */ 65#ifdef HAVE_GETTIMEOFDAY 66 else 67 (void)gettimeofday(&now, NULL); 68#else 69 else { 70 now.tv_sec = (long)time(NULL); 71 now.tv_usec = 0; 72 } 73#endif 74 return now; 75} 76 77#elif defined(HAVE_GETTIMEOFDAY) 78 79struct timeval tutil_tvnow(void) 80{ 81 /* 82 ** gettimeofday() is not granted to be increased monotonically, due to 83 ** clock drifting and external source time synchronization it can jump 84 ** forward or backward in time. 85 */ 86 struct timeval now; 87 (void)gettimeofday(&now, NULL); 88 return now; 89} 90 91#else 92 93struct timeval tutil_tvnow(void) 94{ 95 /* 96 ** time() returns the value of time in seconds since the Epoch. 97 */ 98 struct timeval now; 99 now.tv_sec = (long)time(NULL); 100 now.tv_usec = 0; 101 return now; 102} 103 104#endif 105 106/* 107 * Make sure that the first argument is the more recent time, as otherwise 108 * we'll get a weird negative time-diff back... 109 * 110 * Returns: the time difference in number of milliseconds. 111 */ 112long tutil_tvdiff(struct timeval newer, struct timeval older) 113{ 114 return (newer.tv_sec-older.tv_sec)*1000+ 115 (newer.tv_usec-older.tv_usec)/1000; 116} 117 118/* 119 * Same as tutil_tvdiff but with full usec resolution. 120 * 121 * Returns: the time difference in seconds with subsecond resolution. 122 */ 123double tutil_tvdiff_secs(struct timeval newer, struct timeval older) 124{ 125 if(newer.tv_sec != older.tv_sec) 126 return (double)(newer.tv_sec-older.tv_sec)+ 127 (double)(newer.tv_usec-older.tv_usec)/1000000.0; 128 else 129 return (double)(newer.tv_usec-older.tv_usec)/1000000.0; 130} 131 132/* return the number of seconds in the given input timeval struct */ 133long tutil_tvlong(struct timeval t1) 134{ 135 return t1.tv_sec; 136} 137 138