i made some progress while we were mailing between us.<div><br></div><div>first of all, im trying to see if my object can be serialized / deserialized in the common way without going into MPI yet.</div><div>objects are Lattices, they have Nodes and Edges. nothing more.</div>

<div><br></div><div>this is how i&#39;ve setup serialization for all three types of classes:</div><div><br></div><div>#NODE</div><div><div>class Node{</div><div>    private:</div><div>        friend class boost::serialization::access;</div>

<div>        template&lt;class Archive&gt;</div><div>        void serialize(Archive &amp; ar, const unsigned int version){</div><div>            ar &amp; sp;</div><div>            ar &amp; id;</div><div>            ar &amp; ext;</div>

<div>            ar &amp; x;</div><div>            ar &amp; y;</div><div>            ar &amp; z;</div><div>            ar &amp; eMap;</div><div>        }</div><div>    public:</div><div>        bool sp; //special flag</div>

<div>        int id, ext;</div><div>        float x, y, z;</div><div>        multimap&lt;int,int&gt; eMap;</div><div>        //plus some methods which i didnt put</div><div>};</div><div><br></div><div><br></div><div><br>
</div>
<div><br></div><div>#CLASS EDGE</div><div><div>class Edge{</div><div>    private:</div><div>        friend class boost::serialization::access;</div><div>        template&lt;class Archive&gt;</div><div>        void serialize(Archive &amp; ar, const unsigned int version){</div>

<div>            ar &amp; sp;</div><div>            ar &amp; dead;</div><div>            ar &amp; n1;</div><div>            ar &amp; n2;</div><div>            ar &amp; id;</div><div>        }</div><div>    public:</div><div>

        int n1;</div><div>        int n2;</div><div>        int id;</div><div>        bool sp;</div><div>        bool dead;</div><div>        //plus some methods, constructors, etc</div><div>};</div></div><div><br></div>
<div>
#finally, CLASS LATTICE</div><div><br></div><div><div>class Lattice{</div><div>    private:</div><div>            friend class boost::serialization::access;</div><div>            template&lt;class Archive&gt;</div><div>            void serialize(Archive &amp; ar, const unsigned int version){</div>

<div>                ar &amp; numNodes; //int</div><div>                ar &amp; numEdges;  //int</div><div>                ar &amp; nodes; //map</div><div>                ar &amp; edges; //map</div><div>                //ar &amp; key;  //! had to comment this attribute, stringstream couldn&#39;t be serialized</div>

<div>                ar &amp; keyLists; //list &lt; list&gt; &gt;</div><div>                ar &amp; corrupt;//bool</div><div>                ar &amp; rec;//bool</div><div>                ar &amp; nop;//int</div><div>            }</div>

<div><br></div><div>    public:</div><div>            int numNodes;</div><div>            int numEdges;</div><div>            map&lt;int, Edge&gt; edges;</div><div>            map&lt;int, Node&gt; nodes;</div><div>            stringstream key;</div>

<div>            list&lt; list&lt;int&gt; &gt; keyLists;</div><div>            bool corrupt;</div><div>            bool rec;</div><div>            int nop;</div></div><div>            //plus constructors, methods, etc</div>

<div>}</div><div><br></div><div>it compiles and links ok, and when i test serialization / deserialization with the following code..:</div><div><br></div><div><div>                printf(&quot;serializing to binlat.x...\n&quot;);</div>

<div>                //!file mode</div><div>                /*</div><div>                std::ofstream ofs(&quot;binlat.x&quot;, ios::binary);</div><div>                boost::archive::binary_oarchive oa(ofs);</div><div>
                */</div>
<div>                oa &lt;&lt; *(this-&gt;lat);</div><div>                ofs.close();</div><div>                lat-&gt;print(); //check what lattice im serializing</div><div>                //!Deserialization - read file  binlat.x and reconstruct</div>

<div>                printf(&quot;reconstructing serialized binlat.x...\n&quot;);</div><div>                Lattice nl;</div><div>                std::ifstream ifs(&quot;binlat.x&quot;, ios::binary);</div><div>                boost::archive::binary_iarchive ia(ifs);</div>

<div>                //!deserialize object</div><div>                ia &gt;&gt; nl;</div><div>                ifs.close();</div><div>                nl.print();</div></div><div><br></div><div><br></div><div>i get bad errors when deserializing, complaining about a bool and char.</div>

<div><div>serializing to binlat.x...</div><div>Lattice::print().....START</div><div>Nodes=2   Edges= 1</div><div>Node[0]<span class="Apple-tab-span" style="white-space:pre">	</span>sp=1<span class="Apple-tab-span" style="white-space:pre">	</span>ext=1</div>

<div><span class="Apple-tab-span" style="white-space:pre">	</span>Linked to edge 2 (Node 3 or 0 )</div><div>Node[3]<span class="Apple-tab-span" style="white-space:pre">	</span>sp=1<span class="Apple-tab-span" style="white-space:pre">	</span>ext=2</div>

<div><span class="Apple-tab-span" style="white-space:pre">	</span>Linked to edge 2 (Node 3 or 0 )</div><div>Lattice::print().....END</div><div>[enter]</div><div>reconstructing swerialized binlat.x...</div><div>[enter]</div>

<div>plattice: /usr/local/include/boost/archive/basic_binary_iprimitive.hpp:98: void boost::archive::basic_binary_iprimitive&lt;Archive, Elem, Tr&gt;::load(bool&amp;) [with Archive = boost::archive::binary_iarchive, Elem = char, Tr = std::char_traits&lt;char&gt;]: Assertion `0 == i || 1 == i&#39; failed.</div>

<div>[lenovo00:29384] *** Process received signal ***</div><div>[lenovo00:29384] Signal: Aborted (6)</div><div>[lenovo00:29384] Signal code:  (-6)</div><div>[lenovo00:29384] [ 0] [0xfea410]</div><div>[lenovo00:29384] [ 1] /lib/tls/i686/cmov/libc.so.6(abort+0x182) [0xd41a82]</div>

<div>[lenovo00:29384] [ 2] /lib/tls/i686/cmov/libc.so.6(__assert_fail+0xf8) [0xd37718]</div><div>[lenovo00:29384] [ 3] </div><div>..</div><div>..</div><div>*** End of error message ***</div></div><div><br></div><div>i started debugging, and realized that the problem is completely gone when i remove &quot;edges&quot; from the serialization members of &quot;Lattice&quot; object.</div>

<div>its weird, because &quot;edge&quot; is a map of &lt;int, Edge&gt; and much simplier than &quot;nodes&quot; which does work. obviously i cannot continue without edges, so i need to fix it somehow, but i dont understand the error related to edges, maybe is something im not seeing.</div>

<div><br></div><div>dont get distracted by the messy code, i had to edit it a little to focus on the case.</div><div>regards</div><div>Cristobal</div><div><br></div><div><br></div><br><div class="gmail_quote">On Thu, Aug 26, 2010 at 4:35 PM, Robert Ramey <span dir="ltr">&lt;<a href="mailto:ramey@rrsd.com">ramey@rrsd.com</a>&gt;</span> wrote:<br>

<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">





<div style="word-wrap:break-word" bgcolor="#ffffff"><div class="im">
<div>&gt; Change the &quot;would&quot; into &quot;is&quot;: it is possible to mix Boost.MPI 
with<br>&gt; Boost.Serialization. Any objext that can be serialized can be sent 
by<br>&gt; Boost.MPI. This was actually the basic idea behind Boost.MPI, to 
use<br>&gt; Boost.Serialization to pack and unpack MPI buffers, or to 
create<br>&gt; custom MPI datatypes.    <br></div>
</div><div>On thing that I never understood is why you need MPI data types at 
all.</div>
<div>If one is serializing (packing) to a binary array, and sending 
that, what</div>
<div>hae MPI data types have to do with it.</div>
<div> </div>
<div>If one were using heterogenious machines, I could 
understand the</div>
<div>usage of MPI types. But as I understand it, the MPI serialization 
presumes</div>
<div>that the machines are binary compatible.  So I&#39;m just not seeing 
this.</div>
<div> </div>
<div>Robert Ramey</div>
<div> <br></div></div>
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