cc_arrange.mpi.apts: Set or Get MPI Array Pointers in R

Description Usage Details Value Author(s) References Examples

Description

The function set/get a point address in R where the point point to a structure containing MPI arrays.

Usage

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Details

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.

Value

'.__MPI_APTS__' is set in the .GlobalEnv of R.

Author(s)

Wei-Chen Chen wccsnow@gmail.com, George Ostrouchov, Drew Schmidt, Pragneshkumar Patel, and Hao Yu.

References

Programming with Big Data in R Website: https://pbdr.org/

Examples

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## Not run: 
### See source code for the details.

## End(Not run)

pbdMPI documentation built on Nov. 6, 2021, 9:07 a.m.