1 /* Copyright (C) 2002-2021 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 3 4 The GNU C Library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 2.1 of the License, or (at your option) any later version. 8 9 The GNU C Library is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with the GNU C Library; if not, see 16 <https://www.gnu.org/licenses/>. */ 17 18 #include <pthreadP.h> 19 20 #if IS_IN (libc) 21 # ifndef TLS_MULTIPLE_THREADS_IN_TCB 22 /* Variable set to a nonzero value either if more than one thread runs or ran, 23 or if a single-threaded process is trying to cancel itself. See 24 nptl/descr.h for more context on the single-threaded process case. */ 25 int __libc_multiple_threads; 26 libc_hidden_data_def (__libc_multiple_threads) 27 # endif 28 #endif 29