1/* Support for single-thread optimizations.
 2   Copyright (C) 2020-2025 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// zig patch: sys/single_threaded.h header was added in glibc 2.32
20#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 32
21   #error "sys/single_threaded.h did not exist before glibc 2.32"
22#endif /* error for glibc before 2.32 */
23
24#ifndef _SYS_SINGLE_THREADED_H
25#define _SYS_SINGLE_THREADED_H
26
27#include <features.h>
28
29__BEGIN_DECLS
30
31/* If this variable is non-zero, then the current thread is the only
32   thread in the process image.  If it is zero, the process might be
33   multi-threaded.  */
34extern char __libc_single_threaded;
35
36__END_DECLS
37
38#endif /* _SYS_SINGLE_THREADED_H */