mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-14 09:01:07 +00:00
57 lines
2.0 KiB
C
57 lines
2.0 KiB
C
/* Internal header file for __libc_supported_implementations.
|
|
Copyright (C) 2012-2020 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, i, func, usable, impl) \
|
|
extern __typeof (func) impl attribute_hidden; \
|
|
(array)[i++] = (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(n, name, func, ...) \
|
|
if (strcmp (name, #func) == 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 */
|