1 /* Copyright (C) 2002-2017 Free Software Foundation, Inc. 2 Contributed by Jakub Jelinek <jakub@redhat.com>, 2002. 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 <http://www.gnu.org/licenses/>. */ 17 18 #include <sysdep.h> 19 #include <tls.h> 20 #ifndef __ASSEMBLER__ 21 # include <pthreadP.h> 22 #endif 23 24 #if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt 25 26 # ifdef IS_IN_libpthread 27 # define __local_multiple_threads __pthread_multiple_threads 28 # elif !defined NOT_IN_libc 29 # define __local_multiple_threads __libc_multiple_threads 30 # endif 31 32 # if defined IS_IN_libpthread || !defined NOT_IN_libc 33 extern int __local_multiple_threads attribute_hidden; 34 # define SINGLE_THREAD_P \ 35 __builtin_expect (__local_multiple_threads == 0, 1) 36 37 # else 38 39 # define SINGLE_THREAD_P \ 40 __builtin_expect (THREAD_GETMEM (THREAD_SELF, \ 41 header.multiple_threads) == 0, 1) 42 # endif 43 44 #else 45 46 # define SINGLE_THREAD_P (1) 47 # define NO_CANCELLATION 1 48 49 #endif 50 51 # define RTLD_SINGLE_THREAD_P \ 52 __builtin_expect (THREAD_GETMEM (THREAD_SELF, \ 53 header.multiple_threads) == 0, 1) 54