MPI_Info_get_nkeys - Online Linux Manual PageSection : 3
Updated : Jan 21, 2016
Source : 1.10.2
Note : Open MPI

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NAMEMPI_Info_get_nkeys − Gets the number of keys currently defined in an info object.

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SYNTAX

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C Syntax#include <mpi.h> int MPI_Info_get_nkeys(MPI_Info info, int *nkeys)

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Fortran SyntaxINCLUDE 'mpif.h' MPI_INFO_GET_NKEYS(INFO, NKEYS, IERROR) INTEGER INFO, NKEYS, IERROR

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C++ Syntax#include <mpi.h> int MPI::Info::Get_nkeys() const

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INPUT PARAMETERinfo  Info object (handle).

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OUTPUT PARAMETERSnkeys  Number of defined keys (integer). IERROR  Fortran only: Error status (integer).

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DESCRIPTIONMPI_Info_get_nkeys returns the number of currently defined keys in info.

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ERRORSAlmost 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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SEE ALSO.ft r MPI_Info_get
MPI_Info_get_nthkey
MPI_Info_get_valueln
0

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ERROR : Need New Coding :         (rof_ft|15|MPI_Info_get_nkeys.3|58|r|.ft r )    

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