1/* Multiple versions of strnlen.
2 All versions must be listed in ifunc-impl-list.c.
3 Copyright (C) 2017-2022 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <https://www.gnu.org/licenses/>. */
19
20/* Define multiple versions only for the definition in libc. */
21#if IS_IN (libc)
22# define strnlen __redirect_strnlen
23# define __strnlen __redirect___strnlen
24# include <string.h>
25# undef __strnlen
26# undef strnlen
27
28# define SYMBOL_NAME strnlen
29# include "ifunc-avx2.h"
30
31libc_ifunc_redirected (__redirect_strnlen, __strnlen, IFUNC_SELECTOR ());
32weak_alias (__strnlen, strnlen);
33# ifdef SHARED
34__hidden_ver1 (__strnlen, __GI___strnlen, __redirect___strnlen)
35 __attribute__((visibility ("hidden"))) __attribute_copy__ (strnlen);
36__hidden_ver1 (strnlen, __GI_strnlen, __redirect_strnlen)
37 __attribute__((weak, visibility ("hidden"))) __attribute_copy__ (strnlen);
38# endif
39#endif
40

source code of glibc/sysdeps/x86_64/multiarch/strnlen.c