// Copyright (c) 2005-2009 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:

// Name        : libdl.cpp

// Part of     : libdl library

// Dll entry point functions

//

// INCLUDE FILES

#include <dlfcn.h>  //RTLD_DEFAULT

#include "libdl_r.h"  //_r functions 

// EXTERNAL FUNCTION PROTOTYPES

//-----------------------------------------------------------------------------

//Function Name : void* dlopen(const char* filename, int flag)

//Description   : It takes the filename of the dynamic library to be loaded. 

//				  The dynamic library is loaded and a "handle" to this executable

//				  is returned to the caller.

//Return Value  : valid handle if succesful otherwise NULL and an error message

//				  is logged. The user can retrieve the error message through a 

//				  call to dlerror()

//-----------------------------------------------------------------------------

EXPORT_C void* dlopen(const char* filename, int flag)

	{

	if ( !filename )

		{

		return RTLD_DEFAULT;

		}

	return __dlopen_r(filename, flag);;

	}

//-----------------------------------------------------------------------------

//Function Name : void* dlsym(void* handle, const char* symbol)

//Description   : It takes the handle (as returned by dlopen or RTLD_DEFAULT/

//				  RTLD_NEXT/RTLD_SELF) and the NULL terminated string for symbol

//				  name or the ordinal number. It locates the symbol corresponding

//				  to this name or ordinal number.

//Return Value  : Symbols address address if the symbol name or ordinal number 

//				  is found, otherwise NULL is returned and an error message is

//				  logged. The user can retrieve the error message through a call

//				  to dlerror().

//-----------------------------------------------------------------------------

EXPORT_C void* dlsym(void* handle, const char* symbol)

	{

	return __dlsym_r(handle, symbol);

	}	

//-----------------------------------------------------------------------------

//Function Name : char* dlerror(void)

//Description   : Gives the last error that occurred due to any of the dl 

//				  operations.

//Return Value  : a NULL-terminated character string that gives the last error 

//				  that occurred due to any of the dl operations. If no errors 

//				  have occurred since the last call to dlerror(), dlerror() 

//				  returns NULL.

//-----------------------------------------------------------------------------

EXPORT_C char* dlerror(void)

	{

	return (char*) __dlerror_r();

	}

//-----------------------------------------------------------------------------

//Function Name : int dlclose(void* handle)

//Description   : Decrements the reference count corresponding to the handle.

//				  If refrence count becomes zero library is unloaded.

//Return Value  : 0 on success otherwise non zero value

//-----------------------------------------------------------------------------

EXPORT_C int dlclose(void* handle)

	{

	return __dlclose_r(handle);

	}