comm - communicator handle from C (handle)
FORTRAN communicator handle (handle)
The MPI_Comm_c2f() function is used to convert a C communicator handle comm , into a FORTRAN integer-sized communicator handle. This function will never raise an error.
Since this function is compiled inline for performance reasons, a profiler will not be able to hook it. (In this MPI implementation, the C and FORTRAN handles are identical for this type of handle.) PMPI_Comm_f2c() is the profiling version of this function.
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