[boost] Re: smart_ptr and handles

From: Dirk Gregorius (dirk_at_[hidden])
Date: 2004-12-29 08:51:27

Thanks for your help and sorry for not looking carefully at the 
documentation:

I tried the following for a Windows device context:

The creation function is:     HDC GetDC( HWND)
The deletion function is:     int ReleaseDC( HWND, HDC );

// Code like in the documentation...
typedef  shared_ptr<void> handle;
handle make_dc( HWND hWnd )
{
    // The release function takes two arguments, so I tried an adapter 
functor...unfortunately it does not work
    handle( GetDC( hWnd ), bind1( ReleaseDC, hWnd ) );
}

My problem is to bind the window handle to the custom delete function. 
My compilter spits aout a lot of  error messages here.
Can I use boost::bind here or boost::function?

BTW: How does shared_ptr call the custom delete function? For a COM 
object it should call in the D'tor:

raw_ptr->Release();

While in my case it should call ( what is the usual way in the C++  
standard IIRC ):

Release( raw_ptr );

Does the shard_ptr interface figures this out in some clever way and 
manage this internally?

Regards,

-Dirk