glibc/include/ifunc-impl-list.h
Paul Eggert 581c785bf3 Update copyright dates with scripts/update-copyrights
I used these shell commands:

../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright
(cd ../glibc && git commit -am"[this commit message]")

and then ignored the output, which consisted lines saying "FOO: warning:
copyright statement not found" for each of 7061 files FOO.

I then removed trailing white space from math/tgmath.h,
support/tst-support-open-dev-null-range.c, and
sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following
obscure pre-commit check failure diagnostics from Savannah.  I don't
know why I run into these diagnostics whereas others evidently do not.

remote: *** 912-#endif
remote: *** 913:
remote: *** 914-
remote: *** error: lines with trailing whitespace found
...
remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
2022-01-01 11:40:24 -08:00

57 lines
2.0 KiB
C

/* Internal header file for __libc_supported_implementations.
Copyright (C) 2012-2022 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 */