]>
Commit | Line | Data |
---|---|---|
11dd4af6 | 1 | /* Internal header file for __libc_supported_implementations. |
688903eb | 2 | Copyright (C) 2012-2018 Free Software Foundation, Inc. |
11dd4af6 L |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
17 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #ifndef _IFUNC_IMPL_LIST_H | |
20 | #define _IFUNC_IMPL_LIST_H 1 | |
21 | ||
22 | #include <stdbool.h> | |
23 | #include <stddef.h> | |
24 | ||
25 | struct libc_ifunc_impl | |
26 | { | |
27 | /* The name of function to be tested. */ | |
28 | const char *name; | |
29 | /* The address of function to be tested. */ | |
30 | void (*fn) (void); | |
31 | /* True if this implementation is usable on this machine. */ | |
32 | bool usable; | |
33 | }; | |
34 | ||
35 | /* Add an IFUNC implementation, IMPL, for function FUNC, to ARRAY with | |
36 | USABLE at index I and advance I by one. */ | |
37 | #define IFUNC_IMPL_ADD(array, i, func, usable, impl) \ | |
38 | extern __typeof (func) impl attribute_hidden; \ | |
39 | (array)[i++] = (struct libc_ifunc_impl) { #impl, (void (*) (void)) impl, (usable) }; | |
40 | ||
41 | /* Return the number of IFUNC implementations, N, for function FUNC if | |
42 | string NAME matches FUNC. */ | |
43 | #define IFUNC_IMPL(n, name, func, ...) \ | |
44 | if (strcmp (name, #func) == 0) \ | |
45 | { \ | |
46 | __VA_ARGS__; \ | |
47 | return n; \ | |
48 | } | |
49 | ||
50 | /* Fill ARRAY of MAX elements with IFUNC implementations for function | |
51 | NAME and return the number of valid entries. */ | |
52 | extern size_t __libc_ifunc_impl_list (const char *name, | |
53 | struct libc_ifunc_impl *array, | |
54 | size_t max); | |
55 | ||
56 | #endif /* ifunc-impl-list.h */ |