/*

* Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: 

*

*/

#ifndef __G_LOW_MEM_H__

#define __G_LOW_MEM_H__

#include <unistd.h> 

#include <setjmp.h>

/*-------------------------- Data Structure Decleration ----------------*/

typedef struct _cleanUpStack cleanUpStack ;

typedef struct _mem_info mem_info ;

struct _cleanUpStack

{

	void *ptr[1000];

	int top;

};

struct _mem_info

{

	int is_setjmp_called;

	jmp_buf buf;

	cleanUpStack stack;

};

/*--------------------Function declerations------------------*/ 

#ifdef __cplusplus

extern "C"

{

#endif    /* __cplusplus */

IMPORT_C mem_info * _get_thread_specific_data();

IMPORT_C int _set_thread_specific_data(mem_info *m);

IMPORT_C int _push(cleanUpStack *cs,void *ptr);

IMPORT_C void *_pop(cleanUpStack *cs);

IMPORT_C void _findAndDestroy(cleanUpStack *cs,void *ptr);

IMPORT_C void _destroCleanUpStack(cleanUpStack *cs);

IMPORT_C void _clearCleanUpStack(cleanUpStack *cs);

IMPORT_C void * _pAlloc(size_t size);

IMPORT_C void _dummy1();

IMPORT_C void _dummy2();

IMPORT_C void _dummy3();

#ifdef __cplusplus

}

#endif    /* __cplusplus */

/*--------------------MACRO declerations------------------*/

#define SET_LOW_MEMORY_TRAP_VOID()	\

gboolean did_i_set = FALSE;\

{\

	mem_info *m = _get_thread_specific_data();\

	if(m == NULL)\

	{\

		m = (mem_info *)_pAlloc(sizeof(mem_info));\

		if(!m)\

			return;\

		m->is_setjmp_called = FALSE;\

		_clearCleanUpStack(&(m->stack));\

		if(_set_thread_specific_data(m))\

			return;\

	}\

	if(!m->is_setjmp_called)\

	{\

  		if(setjmp(m->buf) > 0)\

  		{\

  			m->is_setjmp_called = FALSE;\

  			_destroCleanUpStack(&(m->stack));\

  			return ;\

  		}\

  		m->is_setjmp_called = TRUE;\

  		did_i_set = TRUE;\

  	}\

}

#define SET_LOW_MEMORY_TRAP(failure_value)	\

gboolean did_i_set = FALSE;\

{\

	mem_info *m = _get_thread_specific_data();\

	if(m == NULL)\

	{\

		m = (mem_info *)_pAlloc(sizeof(mem_info));\

		if(!m)\

			return failure_value;\

		m->is_setjmp_called = FALSE;\

		_clearCleanUpStack(&(m->stack));\

		if(_set_thread_specific_data(m))\

			return failure_value;\

	}\

	if(!m->is_setjmp_called)\

	{\

  		if(setjmp(m->buf) > 0)\

  		{\

  			m->is_setjmp_called = FALSE;\

  			_destroCleanUpStack(&(m->stack));\

  			return failure_value;\

  		}\

  		m->is_setjmp_called = TRUE;\

  		did_i_set = TRUE;\

  	}\

}

#define REMOVE_LOW_MEMORY_TRAP()	{\

if(did_i_set)\

	{\

	mem_info *m = _get_thread_specific_data();\

	if(m)\

		m->is_setjmp_called = FALSE;\

		_clearCleanUpStack(&(m->stack));\

	}\

}

#endif /* __G_LOW_MEM_H__ */