# MPI_Get_processor_name

## NAME

MPI_Get_processor_name − Gets the name of the processor.

## SYNTAX

## C Syntax

#include <mpi.h>
int MPI_Get_processor_name(char *name, int *resultlen)

## Fortran Syntax

INCLUDE ’mpif.h’
MPI_GET_PROCESSOR_NAME(NAME, RESULTLEN, IERROR)

| CHARACTER*(*) |  |  |  | NAME
| INTEGER |  |  |  | RESULTLEN, IERROR

## C++ Syntax

#include <mpi.h>
void Get_processor_name(char* name, int& resultlen)

## OUTPUT PARAMETERS

| name |  | A unique specifier for the actual (as opposed to virtual) node.
| resultlen |  | Length (in characters) of result returned in name.
| IERROR |  | Fortran only: Error status (integer).

## DESCRIPTION

This routine returns the name of the processor on which it was called at the moment of the call. The name is a character string for maximum flexibility. From this value it must be possible to identify a specific piece of hardware. The argument name must represent storage that is at least MPI_MAX_PROCESSOR_NAME characters long.

The number of characters actually written is returned in the output argument, resultlen.

## NOTES

The user must provide at least MPI_MAX_PROCESSOR_NAME space to write the processor name; processor names can be this long. The user should examine the output argument, resultlen, to determine the actual length of the name.

## ERRORS

Almost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument. C++ functions do not return errors. If the default error handler is set to MPI::ERRORS_THROW_EXCEPTIONS, then on error the C++ exception mechanism will be used to throw an MPI:Exception object.

Before the error value is returned, the current MPI error handler is called. By default, this error handler aborts the MPI job, except for I/O function errors. The error handler may be changed with MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN may be used to cause error values to be returned. Note that MPI does not guarantee that an MPI program can continue past an error.

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