Re: [Boost-users] [serialization] Problems with serializing a shared_ptr

Subject: Re: [Boost-users] [serialization] Problems with serializing a shared_ptr
From: Stefan Ulbrich (stevie157_at_[hidden])
Date: 2009-11-17 05:43:37

Hi,

thanks a lot for you help. Unfortunately, adding a virtual dummy  
function to the base class (the only one I can alter directly in the  
library)  didn't resolve the problem.
So I don't know (didn't check the beta) if 1.41 will resolve this issue.
I tried to track it down deep into the heap allocation but I don't  
have any experience at all with meta-programming and the MPL and gave  
up in the end.
I found a quick (and dirty) fix, though, that helps in my case.  
Therefor, I wrote a specialization of  
boost::archive::details::heap_allocator for the eigen::Matrix<>  
classes that uses
code that was reserved for compiler that didn't support the  
has_new_operator feature (which is obviously the case).

namespace boost {
     namespace archive {
         namespace detail {
             template<typename Scalar, int Rows, int Cols>
             struct heap_allocator<Eigen::Matrix<Scalar, Rows, Cols> > {
                 typedef Eigen::Matrix<Scalar, Rows, Cols> T;

                 static T * invoke() {
                     return static_cast<T *> (operator new(sizeof (T)));
                 }
             };
         };
     };
};

Best regards,
Stefan