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
tutil_tvnow(void)31 struct 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
tutil_tvnow(void)47 struct 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
tutil_tvnow(void)81 struct 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
tutil_tvnow(void)95 struct 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 */
tutil_tvdiff(struct timeval newer,struct timeval older)114 long 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 */
tutil_tvdiff_secs(struct timeval newer,struct timeval older)125 double 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
win32_load_system_library(const TCHAR * filename)134 HMODULE 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
