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 "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 30struct 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 struct timeval now; 38 DWORD milliseconds = GetTickCount(); 39 now.tv_sec = milliseconds / 1000; 40 now.tv_usec = (milliseconds % 1000) * 1000; 41 return now; 42} 43 44#elif defined(HAVE_CLOCK_GETTIME_MONOTONIC) 45 46struct timeval tool_tvnow(void) 47{ 48 /* 49 ** clock_gettime() is granted to be increased monotonically when the 50 ** monotonic clock is queried. Time starting point is unspecified, it 51 ** could be the system start-up time, the Epoch, or something else, 52 ** in any case the time starting point does not change once that the 53 ** system has started up. 54 */ 55 struct timeval now; 56 struct timespec tsnow; 57 if(0 == clock_gettime(CLOCK_MONOTONIC, &tsnow)) { 58 now.tv_sec = tsnow.tv_sec; 59 now.tv_usec = tsnow.tv_nsec / 1000; 60 } 61 /* 62 ** Even when the configure process has truly detected monotonic clock 63 ** availability, it might happen that it is not actually available at 64 ** run-time. When this occurs simply fallback to other time source. 65 */ 66#ifdef HAVE_GETTIMEOFDAY 67 else 68 (void)gettimeofday(&now, NULL); 69#else 70 else { 71 now.tv_sec = (long)time(NULL); 72 now.tv_usec = 0; 73 } 74#endif 75 return now; 76} 77 78#elif defined(HAVE_GETTIMEOFDAY) 79 80struct timeval tool_tvnow(void) 81{ 82 /* 83 ** gettimeofday() is not granted to be increased monotonically, due to 84 ** clock drifting and external source time synchronization it can jump 85 ** forward or backward in time. 86 */ 87 struct timeval now; 88 (void)gettimeofday(&now, NULL); 89 return now; 90} 91 92#else 93 94struct timeval tool_tvnow(void) 95{ 96 /* 97 ** time() returns the value of time in seconds since the Epoch. 98 */ 99 struct timeval now; 100 now.tv_sec = (long)time(NULL); 101 now.tv_usec = 0; 102 return now; 103} 104 105#endif 106 107/* 108 * Make sure that the first argument is the more recent time, as otherwise 109 * we'll get a weird negative time-diff back... 110 * 111 * Returns: the time difference in number of milliseconds. 112 */ 113long tool_tvdiff(struct timeval newer, struct timeval older) 114{ 115 return (newer.tv_sec-older.tv_sec)*1000+ 116 (newer.tv_usec-older.tv_usec)/1000; 117} 118 119/* 120 * Same as tool_tvdiff but with full usec resolution. 121 * 122 * Returns: the time difference in seconds with subsecond resolution. 123 */ 124double tool_tvdiff_secs(struct timeval newer, struct timeval older) 125{ 126 if(newer.tv_sec != older.tv_sec) 127 return (double)(newer.tv_sec-older.tv_sec)+ 128 (double)(newer.tv_usec-older.tv_usec)/1000000.0; 129 else 130 return (double)(newer.tv_usec-older.tv_usec)/1000000.0; 131} 132 133/* return the number of seconds in the given input timeval struct */ 134long tool_tvlong(struct timeval t1) 135{ 136 return t1.tv_sec; 137} 138 139