1/* C11 threads call once implementation.
2 Copyright (C) 2018-2020 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <stdalign.h>
20
21#include "thrd_priv.h"
22
23void
24call_once (once_flag *flag, void (*func)(void))
25{
26 _Static_assert (sizeof (once_flag) == sizeof (pthread_once_t),
27 "sizeof (once_flag) != sizeof (pthread_once_t)");
28 _Static_assert (alignof (once_flag) == alignof (pthread_once_t),
29 "alignof (once_flag) != alignof (pthread_once_t)");
30 __pthread_once ((pthread_once_t *) flag, func);
31}
32