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annotate lib/gettime.c @ 7419:0c560af115cb

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author Karl Berry <karl@freefriends.org>
date Sat, 07 Oct 2006 07:42:41 +0000
parents 8a1a9361108c
children b7a83a69ac23
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1 /* gettime -- get the system clock
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2
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3 Copyright (C) 2002, 2004, 2005, 2006 Free Software Foundation, Inc.
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4
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5 This program is free software; you can redistribute it and/or modify
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6 it under the terms of the GNU General Public License as published by
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7 the Free Software Foundation; either version 2, or (at your option)
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8 any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU General Public License for more details.
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14
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15 You should have received a copy of the GNU General Public License
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16 along with this program; if not, write to the Free Software Foundation,
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17 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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18
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19 /* Written by Paul Eggert. */
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20
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21 #include <config.h>
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22
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23 #include "timespec.h"
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24
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25 /* Get the system time into *TS. */
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27 void
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28 gettime (struct timespec *ts)
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29 {
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30 #if HAVE_NANOTIME
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31 nanotime (ts);
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32 #else
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33
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34 # if defined CLOCK_REALTIME && HAVE_CLOCK_GETTIME
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35 if (clock_gettime (CLOCK_REALTIME, ts) == 0)
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36 return;
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37 # endif
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38
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39 # if HAVE_GETTIMEOFDAY
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40 {
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41 struct timeval tv;
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42 gettimeofday (&tv, NULL);
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43 ts->tv_sec = tv.tv_sec;
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44 ts->tv_nsec = tv.tv_usec * 1000;
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45 }
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46 # else
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47
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48 # ifndef OK_TO_USE_1S_CLOCK
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49 # error "Only 1-second nominal clock resolution found. Is that intended?" \
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50 "If so, compile with the -DOK_TO_USE_1S_CLOCK option."
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51 # endif
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52 ts->tv_sec = time (NULL);
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53 ts->tv_nsec = 0;
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54
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55 # endif
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56
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57 #endif
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58 }