1 // Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of the License "ARM EABI LICENCE.txt"

     5 // which accompanies this distribution, and is available

     6 // in kernel/eka/compsupp.

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 // This file is part of usrt.lib (but not ksrt.lib).

    15 // 

    16 //

    17 

    18 

    19 extern "C" {

    20 

    21 typedef void (DTOR)(void *);

    22 

    23 struct dtd 

    24 { 

    25     void * obj;

    26     DTOR * dtor; 

    27 };

    28 

    29 

    30 #define MAX_DTOR_RECORDS 256

    31 dtd dtor_rec[MAX_DTOR_RECORDS];

    32 

    33 typedef dtd** dso_handle;

    34 dtd * __dso_handle = &dtor_rec[MAX_DTOR_RECORDS];

    35 

    36 

    37 // This is called by compiler generated code to record needed destructions of

    38 // dynamically initialized (ctor) top level (BSS) data. 

    39 // I guess this is more efficient for the compiler than __cxa_atexit, since 

    40 // it takes the object that needs dtoring as its first arg, which means its in

    41 // the right register when the ctor returns.

    42 void __aeabi_atexit(void *aObject, void (*aDtor)(void *), dso_handle aHandle)

    43     {

    44     dtd * drec = *aHandle;

    45     drec--;

    46 

    47     if (drec < &dtor_rec[0])

    48         return; // Need to decide what to do here

    49 

    50     drec->dtor = aDtor;

    51     drec->obj  = aObject;

    52 

    53     *aHandle = drec;

    54     }

    55 

    56 int __cxa_atexit( void (*aDtor)(void *), void *aObject, dso_handle aHandle )

    57     {

    58     __aeabi_atexit(aObject, aDtor, aHandle);

    59 

    60     // This is what the C++ GABI spec says to do!!

    61     if (*aHandle < &dtor_rec[0]) 

    62         return -1;

    63 

    64     return 0;

    65     }

    66 

    67 void __cxa_finalize(dso_handle d)

    68     {

    69     dtd * drec = * d;

    70     dtd * lim  = &dtor_rec[MAX_DTOR_RECORDS];

    71     

    72     while (drec < lim) 

    73         {

    74         drec->dtor(drec->obj);

    75         drec++;

    76         }

    77 

    78     *d = drec;

    79     }

    80 

    81 void run_static_dtors()

    82     {

    83     __cxa_finalize(&__dso_handle);

    84     }

    85 

    86 

    87 } // extern "C"

    88