kernel/eka/compsupp/rvct/ucppfini.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 17 Dec 2009 09:24:54 +0200
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/*
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* Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description: 
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* This file is part of usrt.lib (but not ksrt.lib).
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*
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*/
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extern "C" {
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typedef void (DTOR)(void *);
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struct dtd 
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{ 
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    void * obj;
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    DTOR * dtor; 
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};
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#define MAX_DTOR_RECORDS 256
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dtd dtor_rec[MAX_DTOR_RECORDS];
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typedef dtd** dso_handle;
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dtd * __dso_handle = &dtor_rec[MAX_DTOR_RECORDS];
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// This is called by compiler generated code to record needed destructions of
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// dynamically initialized (ctor) top level (BSS) data. 
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// I guess this is more efficient for the compiler than __cxa_atexit, since 
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// it takes the object that needs dtoring as its first arg, which means its in
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// the right register when the ctor returns.
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void __aeabi_atexit(void *aObject, void (*aDtor)(void *), dso_handle aHandle)
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    {
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    dtd * drec = *aHandle;
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    drec--;
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    if (drec < &dtor_rec[0])
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        return; // Need to decide what to do here
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    drec->dtor = aDtor;
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    drec->obj  = aObject;
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    *aHandle = drec;
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    }
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int __cxa_atexit( void (*aDtor)(void *), void *aObject, dso_handle aHandle )
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    {
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    __aeabi_atexit(aObject, aDtor, aHandle);
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    // This is what the C++ GABI spec says to do!!
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    if (*aHandle < &dtor_rec[0]) 
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        return -1;
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    return 0;
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    }
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void __cxa_finalize(dso_handle d)
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    {
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    dtd * drec = * d;
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    dtd * lim  = &dtor_rec[MAX_DTOR_RECORDS];
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    while (drec < lim) 
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        {
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        drec->dtor(drec->obj);
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        drec++;
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        }
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    *d = drec;
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    }
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void run_static_dtors()
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    {
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    __cxa_finalize(&__dso_handle);
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    }
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} // extern "C"