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Man Pages


Manual Reference Pages  -  MPI_ADD_ERROR_CLASS (3)

NAME

MPI_Add_error_class - Creates a new error class and returns its value

CONTENTS

Syntax
C Syntax
Fortran Syntax
C++ Syntax
Output Parameters
Description
Notes
Errors
See Also

SYNTAX

C Syntax

#include <mpi.h>
int MPI_Add_error_class(int *errorclass)

Fortran Syntax

INCLUDE ’mpif.h’
MPI_ADD_ERROR_CLASS(ERRORCLASS, IERROR)
        INTEGER ERRORCLASS, IERROR

C++ Syntax

#include <mpi.h>
int MPI::Add_error_class()

OUTPUT PARAMETERS

errorclass New error class (integer).
IERROR Fortran only: Error status (integer).

DESCRIPTION

The function MPI_Add_error_class creates a new, local error class.

NOTES

Because this function is local, the same value of errorclass may not be returned on all processes that make this call, even if they call the function concurrently. Thus, same error on different processes may not cause the same value of errorclass to be returned. To reduce the potential for confusion, MPI_Add_error_string may be used on multiple processes to associate the same error string with the newly created errorclass. Even though errorclass may not be consistent across processes, using MPI_Add_error_string will ensure the error string associated with it will be the same everywhere.

No function is provided to free error classes, as it is not expected that an application will create them in significant numbers.

The value returned is always greater than or equal to MPI_ERR_LASTCODE.

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.

SEE ALSO

MPI_Add_error_code
MPI_Add_error_string
MPI_Error_class
MPI_Error_string

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1.10.2 MPI_ADD_ERROR_CLASS (3) Jan 21, 2016

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