[Boost-users] [Serialisation] Question on shared_ptr's and base/derived classes

From: Hughes, James (jhughes_at_[hidden])
Date: 2007-05-02 04:14:50

Hi All,

I am trying to serialise a vector of shared_ptr's which point to a base
class which may be one of a number of derived class (Not polymorphic in
that the base class has no virtual functions - its just supplies base
functionality to derived classes)

In very pseudo code

Class A
Class B : public A
Class C : public A

vector<shared_ptr<A> > list;

list.insert(shared_ptr<A> (new B));
list.insert(shared_ptr<A> (new C));

In serialise

Ar & boost::serialization::make_nvp("ListofStuff", list);

Reading the documentation, I believe this should work, but I am getting
a bus error on our embedded system when it tries to serialise the vector
(all the other bits have serialised ok which implies it's all compiled
OK) - it managed "<px" into the XML archive then failed (see below for
file). Bus error can mean a number of things on our board, but usually
an alignment problem.

Anyone any idea where I should look to sort this out?

XML output (starts to serialise pointer on last line):

<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<!DOCTYPE boost_serialization>
<boost_serialization signature="serialization::archive" version="3">
<temp class_id="0" tracking_level="0" version="0">
        <Name>Message1</Name>
        <Filename class_id="1" tracking_level="0" version="0">
                <path>/home/jhughes/msg.xml</path>
        </Filename>
        <Panels class_id="2" tracking_level="0" version="0">
                <count>1</count>
                <item class_id="3" tracking_level="0" version="1">
                        <px</boost_serialization>

James

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