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706ad1e7 | 1 | /* Support for single-thread optimizations. |
dff8da6b | 2 | Copyright (C) 2020-2024 Free Software Foundation, Inc. |
706ad1e7 FW |
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 | <https://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #ifndef _SYS_SINGLE_THREADED_H | |
20 | #define _SYS_SINGLE_THREADED_H | |
21 | ||
22 | #include <features.h> | |
23 | ||
24 | __BEGIN_DECLS | |
25 | ||
26 | /* If this variable is non-zero, then the current thread is the only | |
27 | thread in the process image. If it is zero, the process might be | |
28 | multi-threaded. */ | |
29 | extern char __libc_single_threaded; | |
30 | ||
31 | __END_DECLS | |
32 | ||
33 | #endif /* _SYS_SINGLE_THREADED_H */ |