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295bacba61
This change was motivated by the desire to remove the weird dependency of lib-src/profile.o on src/systime.h. profile.c included systime.h only for current_timespec, and this inclusion required systime.h to have #ifdef emacs in multiple places and complicated further changes I have in mind. The current_timespec decl belongs in timespec.h anyway, and the main effect of this change is to move it there. * lib-src/profile.c (INLINE): Remove. Include timespec.h, not systime.h. * lib/gettime.c (gettime): Prefer clock_gettime to nanotime, and don’t worry about it failing on a CLOCK_REALTIME arg. POSIX requires it to succeed and I don’t know of any counterexamples where the fallbacks would work. (current_timespec): Move here from src/systime.h. Nowadays it seems to be better to not have this function be inline. * lib/timespec.h: Include arg-nonnull.h. (current_timespec): New declaration. (gettime, settime): Declare args to be nonnull. * lib/gettime.c, lib/timespec.h: Copy from Gnulib. * src/systime.h: Simplify by assuming ‘emacs’ is defined, which it always is now. (current_timespec): Move to lib/timespec.h.
51 lines
1.3 KiB
C
51 lines
1.3 KiB
C
/* gettime -- get the system clock
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Copyright (C) 2002, 2004-2007, 2009-2018 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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/* Written by Paul Eggert. */
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#include <config.h>
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#include "timespec.h"
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#include <sys/time.h>
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/* Get the system time into *TS. */
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void
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gettime (struct timespec *ts)
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{
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#if defined CLOCK_REALTIME && HAVE_CLOCK_GETTIME
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clock_gettime (CLOCK_REALTIME, ts);
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#elif HAVE_NANOTIME
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nanotime (ts);
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#else
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struct timeval tv;
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gettimeofday (&tv, NULL);
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ts->tv_sec = tv.tv_sec;
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ts->tv_nsec = tv.tv_usec * 1000;
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#endif
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}
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/* Return the current system time as a struct timespec. */
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struct timespec
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current_timespec (void)
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{
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struct timespec ts;
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gettime (&ts);
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return ts;
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}
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