[boost] [mpi] all_reduce and MPI_IN_PLACE like feature

Subject: [boost] [mpi] all_reduce and MPI_IN_PLACE like feature
From: Alain O Miniussi (alain.miniussi_at_[hidden])
Date: 2012-03-25 16:45:44

Hi,

MPI_Allreduce offers the possibility to use the same buffer 
for the send and recv data:
http://www.open-mpi.org/doc/v1.4/man3/MPI_Allreduce.3.php#toc8

It seems that boost's all_reduce does not allow such a feature.
First, I would like to know if the previous statement is correct and, if
yes, if it was just overlooked or if there was a reason for that?

Just in case, I filed a ticket regarding that issue, along with a
tentative patch, in https://svn.boost.org/trac/boost/ticket/6704

Regards,

Alain