1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2012, 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 ***************************************************************************/
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 tool_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.
38 DWORD milliseconds = GetTickCount();
39 now.tv_sec = milliseconds / 1000;
40 now.tv_usec = (milliseconds % 1000) * 1000;
44 #elif defined(HAVE_CLOCK_GETTIME_MONOTONIC)
46 struct timeval tool_tvnow(void)
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.
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;
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.
66 #ifdef HAVE_GETTIMEOFDAY
68 (void)gettimeofday(&now, NULL);
71 now.tv_sec = (long)time(NULL);
78 #elif defined(HAVE_GETTIMEOFDAY)
80 struct timeval tool_tvnow(void)
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.
88 (void)gettimeofday(&now, NULL);
94 struct timeval tool_tvnow(void)
97 ** time() returns the value of time in seconds since the Epoch.
100 now.tv_sec = (long)time(NULL);
108 * Make sure that the first argument is the more recent time, as otherwise
109 * we'll get a weird negative time-diff back...
111 * Returns: the time difference in number of milliseconds.
113 long tool_tvdiff(struct timeval newer, struct timeval older)
115 return (newer.tv_sec-older.tv_sec)*1000+
116 (newer.tv_usec-older.tv_usec)/1000;
120 * Same as tool_tvdiff but with full usec resolution.
122 * Returns: the time difference in seconds with subsecond resolution.
124 double tool_tvdiff_secs(struct timeval newer, struct timeval older)
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;
130 return (double)(newer.tv_usec-older.tv_usec)/1000000.0;
133 /* return the number of seconds in the given input timeval struct */
134 long tool_tvlong(struct timeval t1)