author | William Roberts <williamr@symbian.org> |
Wed, 31 Mar 2010 12:33:34 +0100 | |
branch | Symbian3 |
changeset 4 | 837f303aceeb |
parent 2 | 2fe1408b6811 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 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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* |
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*/ |
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|
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#ifndef __G_LOW_MEM_H__ |
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#define __G_LOW_MEM_H__ |
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#include <unistd.h> |
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#include <setjmp.h> |
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/*-------------------------- Data Structure Decleration ----------------*/ |
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typedef struct _cleanUpStack cleanUpStack ; |
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typedef struct _mem_info mem_info ; |
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struct _cleanUpStack |
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{ |
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void *ptr[1000]; |
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int top; |
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}; |
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struct _mem_info |
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{ |
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int is_setjmp_called; |
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jmp_buf buf; |
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cleanUpStack stack; |
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}; |
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/*--------------------Function declerations------------------*/ |
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#ifdef __cplusplus |
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extern "C" |
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{ |
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#endif /* __cplusplus */ |
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IMPORT_C mem_info * _get_thread_specific_data(); |
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IMPORT_C int _set_thread_specific_data(mem_info *m); |
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IMPORT_C int _push(cleanUpStack *cs,void *ptr); |
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IMPORT_C void *_pop(cleanUpStack *cs); |
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IMPORT_C void _findAndDestroy(cleanUpStack *cs,void *ptr); |
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IMPORT_C void _destroCleanUpStack(cleanUpStack *cs); |
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IMPORT_C void _clearCleanUpStack(cleanUpStack *cs); |
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IMPORT_C void * _pAlloc(size_t size); |
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IMPORT_C void _dummy1(); |
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IMPORT_C void _dummy2(); |
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IMPORT_C void _dummy3(); |
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#ifdef __cplusplus |
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} |
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#endif /* __cplusplus */ |
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/*--------------------MACRO declerations------------------*/ |
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#define SET_LOW_MEMORY_TRAP_VOID() \ |
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gboolean did_i_set = FALSE;\ |
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{\ |
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mem_info *m = _get_thread_specific_data();\ |
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if(m == NULL)\ |
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{\ |
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m = (mem_info *)_pAlloc(sizeof(mem_info));\ |
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if(!m)\ |
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return;\ |
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m->is_setjmp_called = FALSE;\ |
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_clearCleanUpStack(&(m->stack));\ |
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if(_set_thread_specific_data(m))\ |
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return;\ |
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}\ |
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if(!m->is_setjmp_called)\ |
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{\ |
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if(setjmp(m->buf) > 0)\ |
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{\ |
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m->is_setjmp_called = FALSE;\ |
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_destroCleanUpStack(&(m->stack));\ |
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return ;\ |
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}\ |
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m->is_setjmp_called = TRUE;\ |
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did_i_set = TRUE;\ |
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}\ |
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} |
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#define SET_LOW_MEMORY_TRAP(failure_value) \ |
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gboolean did_i_set = FALSE;\ |
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{\ |
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mem_info *m = _get_thread_specific_data();\ |
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if(m == NULL)\ |
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{\ |
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m = (mem_info *)_pAlloc(sizeof(mem_info));\ |
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if(!m)\ |
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return failure_value;\ |
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m->is_setjmp_called = FALSE;\ |
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_clearCleanUpStack(&(m->stack));\ |
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if(_set_thread_specific_data(m))\ |
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return failure_value;\ |
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}\ |
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if(!m->is_setjmp_called)\ |
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{\ |
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if(setjmp(m->buf) > 0)\ |
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{\ |
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m->is_setjmp_called = FALSE;\ |
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_destroCleanUpStack(&(m->stack));\ |
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return failure_value;\ |
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}\ |
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m->is_setjmp_called = TRUE;\ |
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did_i_set = TRUE;\ |
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}\ |
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} |
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#define REMOVE_LOW_MEMORY_TRAP() {\ |
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if(did_i_set)\ |
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{\ |
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mem_info *m = _get_thread_specific_data();\ |
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if(m)\ |
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m->is_setjmp_called = FALSE;\ |
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_clearCleanUpStack(&(m->stack));\ |
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}\ |
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} |
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#endif /* __G_LOW_MEM_H__ */ |