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50 lines
1.5 KiB
C
50 lines
1.5 KiB
C
/* Reentrant time functions like localtime_r.
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Copyright (C) 2003, 2006-2007, 2010-2024 Free Software Foundation, Inc.
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This file is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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This file 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 Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser 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 <time.h>
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/* The replacement functions in this file are only used on native Windows.
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They are multithread-safe, because the gmtime() and localtime() functions
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on native Windows — both in the ucrt and in the older MSVCRT — return a
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pointer to a 'struct tm' in thread-local memory. */
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static struct tm *
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copy_tm_result (struct tm *dest, struct tm const *src)
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{
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if (! src)
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return 0;
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*dest = *src;
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return dest;
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}
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struct tm *
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gmtime_r (time_t const * restrict t, struct tm * restrict tp)
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{
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return copy_tm_result (tp, gmtime (t));
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}
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struct tm *
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localtime_r (time_t const * restrict t, struct tm * restrict tp)
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{
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return copy_tm_result (tp, localtime (t));
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}
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