41 lines
1.5 KiB
C
41 lines
1.5 KiB
C
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/* C11 threads call once implementation.
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Copyright (C) 2018-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <stdalign.h>
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#include <shlib-compat.h>
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#include "thrd_priv.h"
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void
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__call_once (once_flag *flag, void (*func)(void))
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{
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_Static_assert (sizeof (once_flag) == sizeof (pthread_once_t),
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"sizeof (once_flag) != sizeof (pthread_once_t)");
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_Static_assert (alignof (once_flag) == alignof (pthread_once_t),
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"alignof (once_flag) != alignof (pthread_once_t)");
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__pthread_once ((pthread_once_t *) flag, func);
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}
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#if PTHREAD_IN_LIBC
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versioned_symbol (libc, __call_once, call_once, GLIBC_2_34);
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# if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_28, GLIBC_2_34)
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compat_symbol (libpthread, __call_once, call_once, GLIBC_2_28);
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# endif
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#else /* !PTHREAD_IN_LIBC */
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strong_alias (__call_once, call_once)
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#endif
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