1/* Support for single-thread optimizations. 
2 Copyright (C) 2020-2022 Free Software Foundation, Inc. 
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. */ 
29extern char __libc_single_threaded; 
30 
31__END_DECLS 
32 
33#endif /* _SYS_SINGLE_THREADED_H */ 
34