62 lines
2.2 KiB
C
62 lines
2.2 KiB
C
/* Threads compatibility routines for libgcc2 and libobjc for
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LynxOS. */
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/* Compile this one with gcc. */
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/* Copyright (C) 2004-2020 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef GCC_GTHR_LYNX_H
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#define GCC_GTHR_LYNX_H
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#ifdef _MULTITHREADED
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/* Using the macro version of pthread_setspecific leads to a
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compilation error. Instead we have two choices either kill all
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macros in pthread.h with defining _POSIX_THREADS_CALLS or undefine
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individual macros where we should fall back on the function
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implementation. We choose the second approach. */
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#include <pthread.h>
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#undef pthread_setspecific
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/* When using static libc on LynxOS, we cannot define pthread_create
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weak. If the multi-threaded application includes iostream.h,
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gthr-posix.h is included and pthread_create will be defined weak.
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If pthread_create is weak its defining module in libc is not
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necessarily included in the link and the symbol is resolved to zero.
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Therefore the first call to it will crash.
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Since -mthreads is a multilib switch on LynxOS we know that at this
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point we are compiling for multi-threaded. Omitting the weak
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definitions at this point should have no effect. */
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#undef GTHREAD_USE_WEAK
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#define GTHREAD_USE_WEAK 0
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#include "gthr-posix.h"
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#else
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#include "gthr-single.h"
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#endif
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#endif /* GCC_GTHR_LYNX_H */
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