1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
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.
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.
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
21 ***************************************************************************/
22 #include "tool_setup.h"
24 #include "tool_util.h"
26 #include "memdebug.h" /* keep this as LAST include */
28 #if defined(WIN32) && !defined(MSDOS)
30 struct timeval tvnow(void)
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.
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.
43 #if defined(_WIN32_WINNT) && (_WIN32_WINNT >= 0x0600)
44 ULONGLONG milliseconds = GetTickCount64();
46 DWORD milliseconds = GetTickCount();
48 now.tv_sec = (long)(milliseconds / 1000);
49 now.tv_usec = (milliseconds % 1000) * 1000;
53 #elif defined(HAVE_CLOCK_GETTIME_MONOTONIC)
55 struct timeval tvnow(void)
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.
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;
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.
75 #ifdef HAVE_GETTIMEOFDAY
77 (void)gettimeofday(&now, NULL);
80 now.tv_sec = (long)time(NULL);
87 #elif defined(HAVE_GETTIMEOFDAY)
89 struct timeval tvnow(void)
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.
97 (void)gettimeofday(&now, NULL);
103 struct timeval tvnow(void)
106 ** time() returns the value of time in seconds since the Epoch.
109 now.tv_sec = (long)time(NULL);
117 * Make sure that the first argument is the more recent time, as otherwise
118 * we'll get a weird negative time-diff back...
120 * Returns: the time difference in number of milliseconds.
122 long tvdiff(struct timeval newer, struct timeval older)
124 return (long)(newer.tv_sec-older.tv_sec)*1000+
125 (long)(newer.tv_usec-older.tv_usec)/1000;