66 lines
1.7 KiB
C
66 lines
1.7 KiB
C
/* ISO C 11 once-only initialization.
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Copyright (C) 2005-2024 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 Bruno Haible <bruno@clisp.org>, 2005, 2019.
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Based on GCC's gthr-posix.h, gthr-posix95.h, gthr-win32.h. */
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#include <config.h>
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#include <threads.h>
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#include <errno.h>
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#if defined _WIN32 && ! defined __CYGWIN__
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/* Use Windows threads. */
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# define WIN32_LEAN_AND_MEAN /* avoid including junk */
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# include <windows.h>
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# include <stdlib.h>
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#else
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/* Use POSIX threads. */
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# include <pthread.h>
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#endif
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#if defined _WIN32 && ! defined __CYGWIN__
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/* Use Windows threads. */
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void
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call_once (once_flag *flagp, void (*func) (void))
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{
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glwthread_once (flagp, func);
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}
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#else
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/* Use POSIX threads. */
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void
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call_once (once_flag *flagp, void (*func) (void))
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{
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# if defined __CYGWIN__
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/* Verify that once_flag and pthread_once_t are of the same size. */
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struct _ { int v [sizeof (once_flag) == sizeof (pthread_once_t) ? 1 : -1]; };
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pthread_once ((pthread_once_t *) flagp, func);
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# else
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pthread_once (flagp, func);
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# endif
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}
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#endif
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