MPI array pointers {pbdMPI} | R Documentation |
The function set/get a point address in R where the point point to a structure containing MPI arrays.
arrange.mpi.apts()
Since Rmpi/pbdMPI use pre-allocate memory to store comm, status, datatype, info, request, this function provides a variable in R to let different APIs share the same memory address.
If the package loads first, then this sets '.__MPI_APTS__
'
in the .GlobalEnv
of R. If the package does not load before other
MPI APIs, then this points an structure point to the external memory
according to '.__MPI_APTS__
', i.e. pre-set by other MPI APIs.
pbdMPI/R/arrange.mpi.apts
provides the R code, and
pbdMPI/src/pkg_*.*
provides the details of this call.
'.__MPI_APTS__
' is set in the .GlobalEnv
of R.
Wei-Chen Chen wccsnow@gmail.com, George Ostrouchov, Drew Schmidt, Pragneshkumar Patel, and Hao Yu.
Programming with Big Data in R Website: http://r-pbd.org/
## Not run: ### See source code for the details. ## End(Not run)