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/* Internal header file for __libc_supported_implementations.
Copyright (C) 2012-2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#ifndef _IFUNC_IMPL_LIST_H
#define _IFUNC_IMPL_LIST_H 1
#include <stdbool.h>
#include <stddef.h>
struct libc_ifunc_impl
{
/* The name of function to be tested. */
const char *name;
/* The address of function to be tested. */
void (*fn) (void);
/* True if this implementation is usable on this machine. */
bool usable;
};
/* Add an IFUNC implementation, IMPL, for function FUNC, to ARRAY with
USABLE at index I and advance I by one. */
#define IFUNC_IMPL_ADD(array, max, func, usable, impl) \
extern __typeof (func) impl attribute_hidden; \
if (n < max) (array)[n++] = (struct libc_ifunc_impl) { #impl, (void (*) (void)) impl, (usable) };
/* Return the number of IFUNC implementations, N, for function FUNC if
string NAME matches FUNC. */
#define IFUNC_IMPL(max, name, func, ...) \
if (strcmp (name, #func) == 0) \
{ size_t n = 0;\
__VA_ARGS__; \
return n; \
}
/* Fill ARRAY of MAX elements with IFUNC implementations for function
NAME and return the number of valid entries. */
extern size_t __libc_ifunc_impl_list (const char *name,
struct libc_ifunc_impl *array,
size_t max);
#endif /* ifunc-impl-list.h */
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