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- /* Support for single-thread optimizations.
- Copyright (C) 2020-2021 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 _SYS_SINGLE_THREADED_H
- #define _SYS_SINGLE_THREADED_H
- #include <features.h>
- __BEGIN_DECLS
- /* If this variable is non-zero, then the current thread is the only
- thread in the process image. If it is zero, the process might be
- multi-threaded. */
- extern char __libc_single_threaded;
- __END_DECLS
- #endif /* _SYS_SINGLE_THREADED_H */
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