kopia lustrzana https://github.com/OpenRTX/OpenRTX
115 wiersze
4.3 KiB
C++
115 wiersze
4.3 KiB
C++
/***************************************************************************
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* Copyright (C) 2008, 2009, 2010, 2011, 2012, 2013 by Terraneo Federico *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* As a special exception, if other files instantiate templates or use *
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* macros or inline functions from this file, or you compile this file *
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* and link it with other works to produce a work based on this file, *
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* this file does not by itself cause the resulting work to be covered *
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* by the GNU General Public License. However the source code for this *
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* file must still be made available in accordance with the GNU General *
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* Public License. This exception does not invalidate any other reasons *
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* why a work based on this file might be covered by the GNU General *
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* Public License. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, see <http://www.gnu.org/licenses/> *
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***************************************************************************/
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#ifndef LIBSTDCPP_INTEGRATION_H
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#define LIBSTDCPP_INTEGRATION_H
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//Can't yet make this header private, as it's included by kernel.h
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//#ifndef COMPILING_MIOSIX
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//#error "This is header is private, it can't be used outside Miosix itself."
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//#error "If your code depends on a private header, it IS broken."
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//#endif //COMPILING_MIOSIX
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#include "kernel/error.h"
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namespace __cxxabiv1
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{
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struct __cxa_exception; //A forward declaration of this one is enough
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/*
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* This struct was taken from libsupc++/unwind-cxx.h Unfortunately that file
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* is not deployed in the gcc installation so we can't just #include it.
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* It is required on a per-thread basis to make C++ exceptions thread safe.
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*/
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struct __cxa_eh_globals
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{
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__cxa_exception *caughtExceptions;
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unsigned int uncaughtExceptions;
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//Should be __ARM_EABI_UNWINDER__ but that's only usable inside gcc
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#ifdef __ARM_EABI__
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__cxa_exception* propagatingExceptions;
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#endif //__ARM_EABI__
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};
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} //namespace __cxxabiv1
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namespace miosix {
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//Forward declaration of a class to hide accessors to CppReentrancyData
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class CppReentrancyAccessor;
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/**
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* \internal
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* This is a wrapper class that contains all per-thread data required to make
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* C++ exceptions thread safe, irrespective of the ABI.
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*/
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class CppReentrancyData
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{
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public:
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/**
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* Constructor, initializes the exception related data to their default
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* value
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*/
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CppReentrancyData()
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{
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eh_globals.caughtExceptions=0;
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eh_globals.uncaughtExceptions=0;
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#ifdef __ARM_EABI__
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eh_globals.propagatingExceptions=0;
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#else //__ARM_EABI__
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sjlj_ptr=0;
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#endif //__ARM_EABI__
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}
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/**
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* Destructor, checks that no memory is leaked (should never happen)
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*/
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~CppReentrancyData()
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{
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if(eh_globals.caughtExceptions!=0) errorHandler(UNEXPECTED);
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}
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private:
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CppReentrancyData(const CppReentrancyData&);
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CppReentrancyData& operator=(const CppReentrancyData&);
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/// With the arm eabi unwinder, this is the only data structure required
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/// to make C++ exceptions threadsafe.
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__cxxabiv1::__cxa_eh_globals eh_globals;
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#ifndef __ARM_EABI__
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/// On other no arm architectures, it looks like gcc requires also this
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/// pointer to make the unwinder thread safe
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void *sjlj_ptr;
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#endif //__ARM_EABI__
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friend class CppReentrancyAccessor;
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};
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} //namespace miosix
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#endif //LIBSTDCPP_INTEGRATION_H
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