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