1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2014, 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 http://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 ***************************************************************************/
25 #if defined(WIN32) && !defined(MSDOS)
27 struct timeval curlx_tvnow(void)
30 ** GetTickCount() is available on _all_ Windows versions from W95 up
31 ** to nowadays. Returns milliseconds elapsed since last system boot,
32 ** increases monotonically and wraps once 49.7 days have elapsed.
35 #if !defined(_WIN32_WINNT) || !defined(_WIN32_WINNT_VISTA) || \
36 (_WIN32_WINNT < _WIN32_WINNT_VISTA)
37 DWORD milliseconds = GetTickCount();
38 now.tv_sec = milliseconds / 1000;
39 now.tv_usec = (milliseconds % 1000) * 1000;
41 ULONGLONG milliseconds = GetTickCount64();
42 now.tv_sec = (long) (milliseconds / 1000);
43 now.tv_usec = (long) (milliseconds % 1000) * 1000;
49 #elif defined(HAVE_CLOCK_GETTIME_MONOTONIC)
51 struct timeval curlx_tvnow(void)
54 ** clock_gettime() is granted to be increased monotonically when the
55 ** monotonic clock is queried. Time starting point is unspecified, it
56 ** could be the system start-up time, the Epoch, or something else,
57 ** in any case the time starting point does not change once that the
58 ** system has started up.
61 struct timespec tsnow;
62 if(0 == clock_gettime(CLOCK_MONOTONIC, &tsnow)) {
63 now.tv_sec = tsnow.tv_sec;
64 now.tv_usec = tsnow.tv_nsec / 1000;
67 ** Even when the configure process has truly detected monotonic clock
68 ** availability, it might happen that it is not actually available at
69 ** run-time. When this occurs simply fallback to other time source.
71 #ifdef HAVE_GETTIMEOFDAY
73 (void)gettimeofday(&now, NULL);
76 now.tv_sec = (long)time(NULL);
83 #elif defined(HAVE_GETTIMEOFDAY)
85 struct timeval curlx_tvnow(void)
88 ** gettimeofday() is not granted to be increased monotonically, due to
89 ** clock drifting and external source time synchronization it can jump
90 ** forward or backward in time.
93 (void)gettimeofday(&now, NULL);
99 struct timeval curlx_tvnow(void)
102 ** time() returns the value of time in seconds since the Epoch.
105 now.tv_sec = (long)time(NULL);
113 * Make sure that the first argument is the more recent time, as otherwise
114 * we'll get a weird negative time-diff back...
116 * Returns: the time difference in number of milliseconds.
118 long curlx_tvdiff(struct timeval newer, struct timeval older)
120 return (newer.tv_sec-older.tv_sec)*1000+
121 (newer.tv_usec-older.tv_usec)/1000;
125 * Same as curlx_tvdiff but with full usec resolution.
127 * Returns: the time difference in seconds with subsecond resolution.
129 double curlx_tvdiff_secs(struct timeval newer, struct timeval older)
131 if(newer.tv_sec != older.tv_sec)
132 return (double)(newer.tv_sec-older.tv_sec)+
133 (double)(newer.tv_usec-older.tv_usec)/1000000.0;
135 return (double)(newer.tv_usec-older.tv_usec)/1000000.0;
138 /* return the number of seconds in the given input timeval struct */
139 long Curl_tvlong(struct timeval t1)