git://gcc.gnu.org / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| 4f587cb0 AN |
1 | /* Threads compatibility routines for libgcc2 and libobjc for |
| 2 | LynxOS. */ | |
| 3 | /* Compile this one with gcc. */ | |
| 4 | /* Copyright (C) 2004 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 2, 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 | You should have received a copy of the GNU General Public License | |
| 19 | along with GCC; see the file COPYING. If not, write to the Free | |
| 20 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
| 21 | 02111-1307, USA. */ | |
| 22 | ||
| 23 | /* As a special exception, if you link this library with other files, | |
| 24 | some of which are compiled with GCC, to produce an executable, | |
| 25 | this library does not by itself cause the resulting executable | |
| 26 | to be covered by the GNU General Public License. | |
| 27 | This exception does not however invalidate any other reasons why | |
| 28 | the executable file might be covered by the GNU General Public License. */ | |
| 29 | ||
| 30 | #ifndef GCC_GTHR_LYNX_H | |
| 31 | #define GCC_GTHR_LYNX_H | |
| 32 | ||
| 33 | #ifdef _MULTITHREADED | |
| 34 | ||
| 35 | /* Using the macro version of pthread_setspecific leads to a | |
| 36 | compilation error. Instead we have two choices either kill all | |
| 37 | macros in pthread.h with defining _POSIX_THREADS_CALLS or undefine | |
| 38 | individual macros where we should fall back on the function | |
| 39 | implementation. We choose the second approach. */ | |
| 40 | ||
| 41 | #include <pthread.h> | |
| 42 | #undef pthread_setspecific | |
| 43 | ||
| 44 | /* When using static libc on LynxOS, we cannot define pthread_create | |
| 45 | weak. If the multi-threaded application includes iostream.h, | |
| 46 | gthr-posix.h is included and pthread_create will be defined weak. | |
| 47 | If pthead_create is weak its defining module in libc is not | |
| 2a7e31df | 48 | necessarily included in the link and the symbol is resolved to zero. |
| 4f587cb0 AN |
49 | Therefore the first call to it will crash. |
| 50 | ||
| 51 | Since -mthreads is a multilib switch on LynxOS we know that at this | |
| 52 | point we are compiling for multi-threaded. Omitting the weak | |
| 53 | definitions at this point should have no effect. */ | |
| 54 | ||
| 55 | #undef GTHREAD_USE_WEAK | |
| 56 | #define GTHREAD_USE_WEAK 0 | |
| 57 | ||
| 58 | #include "gthr-posix.h" | |
| 59 | ||
| 60 | #else | |
| 61 | #include "gthr-single.h" | |
| 62 | #endif | |
| 63 | ||
| 64 | #endif /* GCC_GTHR_LYNX_H */ |