Is it possible to send nested structure using MPI_Datatype in MPI using C

Question

I have a structure :

    struct vertex
    {
     double a; double b;
    }

    struct polygon
    {
     int numofVertex;
     vertex v[10];
    }

How to send this nested structure in MPI using MPI_Send?

ThiefMaster · Accepted Answer · 2011-05-11 22:43:52Z

0

Since your structure does not contain any pointers, it's easily possible.

MPI_Send(ptr_to_your_struct, sizeof(struct polygon), MPI_BYTES, ...);

answered May 11, 2011 at 22:43

ThiefMaster

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2 Comments

justin waugh Over a year ago

Thanks for the solution, I think the sent structure can be easily accessed by MPI_Recv(ptr_to_struct, sizeof(struct polygon), MPI_BYTES, ...);

justin waugh Over a year ago

Can you provide some insight when the structure contains pointer fields. Moreover, I have asked this problem as a new question. stackoverflow.com/questions/5972018/…

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