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glibc/include/ifunc-impl-list.h
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/* Internal header file for __libc_supported_implementations. | |
Copyright (C) 2012-2016 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 | |
<http://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 */ |