Re: [Boost-users] boost.MPI dynamic data structure error

Subject: Re: [Boost-users] boost.MPI dynamic data structure error
From: Matthias Troyer (troyer_at_[hidden])
Date: 2010-10-19 20:12:33

On 19 Oct 2010, at 13:39, Jack Bryan wrote:

> Hi , 
> 
> I need to design a data structure to transfer data between nodes by boost.MPI. 
> 
> Some elements of the the structure has dynamic size. 
> 
> For example, 
> 
> typedef struct{
> 
> double data1;
> vector<double> dataVec; 
> 
> } myDataType;
> 
> The size of the dataVec depends on some intermidiate computing results.
> 
> If I only declear it as the above myDataType, I think, only a pointer is transfered. 
> 
> When the data receiver try to access the elements of vector<double> dataVec, it got 
> segmentation fault error.
> 
> But, I also need to use the myDataType to declear other data structures. 
> 
> such as vector<myDataType> newDataVec;

Hi Jack,

All you need to do is to define a serialize() function for your data structure, so that it can be serialized by Boost.Serialization. Then you can transfer the datastructure with Boost.MPI

Matthias