1 /* Threads compatibility routines for libgcc2 and libobjc for 2 LynxOS. */ 3 /* Compile this one with gcc. */ 4 /* Copyright (C) 2004, 2008, 2009, 2011 Free Software Foundation, Inc. 5 6 This file is part of GCC. 7 8 GCC is free software; you can redistribute it and/or modify it under 9 the terms of the GNU General Public License as published by the Free 10 Software Foundation; either version 3, or (at your option) any later 11 version. 12 13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 14 WARRANTY; without even the implied warranty of MERCHANTABILITY or 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 16 for more details. 17 18 Under Section 7 of GPL version 3, you are granted additional 19 permissions described in the GCC Runtime Library Exception, version 20 3.1, as published by the Free Software Foundation. 21 22 You should have received a copy of the GNU General Public License and 23 a copy of the GCC Runtime Library Exception along with this program; 24 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 25 <http://www.gnu.org/licenses/>. */ 26 27 #ifndef GCC_GTHR_LYNX_H 28 #define GCC_GTHR_LYNX_H 29 30 #ifdef _MULTITHREADED 31 32 /* Using the macro version of pthread_setspecific leads to a 33 compilation error. Instead we have two choices either kill all 34 macros in pthread.h with defining _POSIX_THREADS_CALLS or undefine 35 individual macros where we should fall back on the function 36 implementation. We choose the second approach. */ 37 38 #include <pthread.h> 39 #undef pthread_setspecific 40 41 /* When using static libc on LynxOS, we cannot define pthread_create 42 weak. If the multi-threaded application includes iostream.h, 43 gthr-posix.h is included and pthread_create will be defined weak. 44 If pthread_create is weak its defining module in libc is not 45 necessarily included in the link and the symbol is resolved to zero. 46 Therefore the first call to it will crash. 47 48 Since -mthreads is a multilib switch on LynxOS we know that at this 49 point we are compiling for multi-threaded. Omitting the weak 50 definitions at this point should have no effect. */ 51 52 #undef GTHREAD_USE_WEAK 53 #define GTHREAD_USE_WEAK 0 54 55 #include "gthr-posix.h" 56 57 #else 58 #include "gthr-single.h" 59 #endif 60 61 #endif /* GCC_GTHR_LYNX_H */ 62