epoc32/include/stdapis/glib-2.0/glowmem.h
author William Roberts <williamr@symbian.org>
Wed, 31 Mar 2010 12:33:34 +0100
branchSymbian3
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Current Symbian^3 public API header files (from PDK 3.0.h) This is the epoc32/include tree with the "platform" subtrees removed, and all but a selected few mbg and rsg files removed.
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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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#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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2fe1408b6811 Final list of Symbian^2 public API header files
William Roberts <williamr@symbian.org>
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#endif /* __G_LOW_MEM_H__ */