Re: [libxml++] MS Visual 2005 - Return object across DLL boundary? (Was: Another issue)

[Murray Cumming <murrayc murrayc com>]

On Wed, 2006-07-19 at 13:34 -0400, Robert S. Grimes wrote:
[snip]
> This seems to say the object was created on another heap (libxml++ DLL's
> heap?) and being deleted by my code (using the main heap?).  It seems the
> "return value optimization" has been applied, and it perhaps shouldn't have
> been.  Does this make any sense?  If so, what do I do about it?  Or am I
> missing something even more obvious?

This looks the annoying MSVC++ requirement that memory is deallocated in
the same library (DLL) in which it was allocated. So, if a library gives
you a newly allocated object, you can't delete it yourself. You have to
tell the library to delete it.  libsigc++ used to have this same
problem.

You can usually fix this by making sure that, though the deletion is
initiated in the caller, the actual deletion happens in some function in
the library. Which would require a patch.

-- 
Murray Cumming
murrayc murrayc com
www.murrayc.com
www.openismus.com