1/*************************************************************************** 2 * _ _ ____ _ 3 * Project ___| | | | _ \| | 4 * / __| | | | |_) | | 5 * | (__| |_| | _ <| |___ 6 * \___|\___/|_| \_\_____| 7 * 8 * Copyright (C) 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 https://curl.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 * SPDX-License-Identifier: curl 22 * 23 ***************************************************************************/ 24#include "curl_setup.h" 25#include <curl/curl.h> 26#include "testutil.h" 27#include "memdebug.h" 28 29#if defined(_WIN32) 30 31struct timeval tutil_tvnow(void) 32{ 33 /* 34 ** GetTickCount() is available on _all_ Windows versions from W95 up 35 ** to nowadays. Returns milliseconds elapsed since last system boot, 36 ** increases monotonically and wraps once 49.7 days have elapsed. 37 */ 38 struct timeval now; 39 DWORD milliseconds = GetTickCount(); 40 now.tv_sec = (long)(milliseconds / 1000); 41 now.tv_usec = (long)((milliseconds % 1000) * 1000); 42 return now; 43} 44 45#elif defined(HAVE_CLOCK_GETTIME_MONOTONIC) 46 47struct timeval tutil_tvnow(void) 48{ 49 /* 50 ** clock_gettime() is granted to be increased monotonically when the 51 ** monotonic clock is queried. Time starting point is unspecified, it 52 ** could be the system start-up time, the Epoch, or something else, 53 ** in any case the time starting point does not change once that the 54 ** system has started up. 55 */ 56 struct timeval now; 57 struct timespec tsnow; 58 if(0 == clock_gettime(CLOCK_MONOTONIC, &tsnow)) { 59 now.tv_sec = tsnow.tv_sec; 60 now.tv_usec = (int)(tsnow.tv_nsec / 1000); 61 } 62 /* 63 ** Even when the configure process has truly detected monotonic clock 64 ** availability, it might happen that it is not actually available at 65 ** run-time. When this occurs simply fallback to other time source. 66 */ 67#ifdef HAVE_GETTIMEOFDAY 68 else 69 (void)gettimeofday(&now, NULL); 70#else 71 else { 72 now.tv_sec = time(NULL); 73 now.tv_usec = 0; 74 } 75#endif 76 return now; 77} 78 79#elif defined(HAVE_GETTIMEOFDAY) 80 81struct timeval tutil_tvnow(void) 82{ 83 /* 84 ** gettimeofday() is not granted to be increased monotonically, due to 85 ** clock drifting and external source time synchronization it can jump 86 ** forward or backward in time. 87 */ 88 struct timeval now; 89 (void)gettimeofday(&now, NULL); 90 return now; 91} 92 93#else 94 95struct timeval tutil_tvnow(void) 96{ 97 /* 98 ** time() returns the value of time in seconds since the Epoch. 99 */ 100 struct timeval now; 101 now.tv_sec = time(NULL); 102 now.tv_usec = 0; 103 return now; 104} 105 106#endif 107 108/* 109 * Make sure that the first argument is the more recent time, as otherwise 110 * we'll get a weird negative time-diff back... 111 * 112 * Returns: the time difference in number of milliseconds. 113 */ 114long tutil_tvdiff(struct timeval newer, struct timeval older) 115{ 116 return (long)(newer.tv_sec-older.tv_sec)*1000+ 117 (long)(newer.tv_usec-older.tv_usec)/1000; 118} 119 120/* 121 * Same as tutil_tvdiff but with full usec resolution. 122 * 123 * Returns: the time difference in seconds with subsecond resolution. 124 */ 125double tutil_tvdiff_secs(struct timeval newer, struct timeval older) 126{ 127 if(newer.tv_sec != older.tv_sec) 128 return (double)(newer.tv_sec-older.tv_sec)+ 129 (double)(newer.tv_usec-older.tv_usec)/1000000.0; 130 return (double)(newer.tv_usec-older.tv_usec)/1000000.0; 131} 132 133#ifdef _WIN32 134HMODULE win32_load_system_library(const TCHAR *filename) 135{ 136 size_t filenamelen = _tcslen(filename); 137 size_t systemdirlen = GetSystemDirectory(NULL, 0); 138 size_t written; 139 TCHAR *path; 140 141 if(!filenamelen || filenamelen > 32768 || 142 !systemdirlen || systemdirlen > 32768) 143 return NULL; 144 145 /* systemdirlen includes null character */ 146 path = malloc(sizeof(TCHAR) * (systemdirlen + 1 + filenamelen)); 147 if(!path) 148 return NULL; 149 150 /* if written >= systemdirlen then nothing was written */ 151 written = GetSystemDirectory(path, (unsigned int)systemdirlen); 152 if(!written || written >= systemdirlen) 153 return NULL; 154 155 if(path[written - 1] != _T('\\')) 156 path[written++] = _T('\\'); 157 158 _tcscpy(path + written, filename); 159 160 return LoadLibrary(path); 161} 162#endif 163