Re: [luabind] How to adopt a boost::shared_ptr?

[Leo Y. <sur...@ya...>]

Hi,

I have this cpp code:

// cpp code begin
class cTest;
typedef boost::shared_ptr<cTest>		TestPtr;

class cTest
{
public:
	~cTest() { printf( "%d released\n", _a ); }

	int _a;

	static TestPtr CreateSharedPtr( int a )
	{
		TestPtr		p( new cTest );
		p->_a = a;

		return p;
	}

	static cTest* CreateRawPtr( int a )
	{
		cTest *p = new cTest();
		p->_a = a;

		return p;
	}
};
// cpp code end

Let's look the following script code:

--- lua code begin ---
t1 = CreateSharedPtr( 1 )

t2 = CreateRawPtr( 2 )

-- I want to release t2 here
t2 = nil
print( "Release t2 here" )

-- and release t1 here
t1 = nil
print( "Release t1 here" )

print( "over" )

--- lua code end ---

The result was not what I expected. It turned out to
be the following.

Release t2
Release t1
over
2 released
1 released

I supposed that '2 released' would appear before
'Release 2' and I could use the 'adopt' policy here to
help me releasing t1. I thought I had made a mistake
here.

After I tested how lua collect the memory garbage, I
think I must find another way to get 'release t1'. :)

Thanks Daniel and Simon for your attention.

Leo Yee


--- Daniel Wallin <dal...@st...> wrote:
> At 09:39 2003-09-19, Leo Yee wrote:
> >Hi, Arvidn and Daniel!
> >
> >So quiet here recently.
> >
> >I have a question how to adopt a shared_ptr. What I
> >mean is we can let the pointer reset when it go out
> of
> >scope.
> 
> Sorry for the late reply.
> 
> I don't really understand what you mean by this,
> could you
> clarify? Perhaps a code snippet would help.
> 
> ---
> Daniel Wallin
> 
> 
> 
>
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