64 строки
1.7 KiB
Plaintext
64 строки
1.7 KiB
Plaintext
.\" Copyright 2010 Cisco Systems, Inc. All rights reserved.
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.\" Copyright 2006-2008 Sun Microsystems, Inc.
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.\" Copyright (c) 1996 Thinking Machines Corporation
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.TH MPI_Info_get_nkeys 3 "#OMPI_DATE#" "#PACKAGE_VERSION#" "#PACKAGE_NAME#"
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.SH NAME
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\fBMPI_Info_get_nkeys\fP \- Gets the number of keys currently defined in an info object.
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.SH SYNTAX
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.ft R
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.SH C Syntax
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.nf
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#include <mpi.h>
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int MPI_Info_get_nkeys(MPI_Info \fIinfo\fP, int \fI*nkeys\fP)
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.fi
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.SH Fortran Syntax
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.nf
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INCLUDE 'mpif.h'
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MPI_INFO_GET_NKEYS(\fIINFO, NKEYS, IERROR\fP)
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INTEGER \fIINFO, NKEYS, IERROR\fP
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.fi
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.SH C++ Syntax
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.nf
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#include <mpi.h>
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int MPI::Info::Get_nkeys() const
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.fi
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.SH INPUT PARAMETER
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.ft R
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.TP 1i
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info
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Info object (handle).
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.SH OUTPUT PARAMETERS
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.ft R
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.TP 1i
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nkeys
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Number of defined keys (integer).
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.ft R
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.TP 1i
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IERROR
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Fortran only: Error status (integer).
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.SH DESCRIPTION
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.ft R
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MPI_Info_get_nkeys returns the number of currently defined keys in \fIinfo\fP.
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.SH ERRORS
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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.
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.sp
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Before the error value is returned, the current MPI error handler is
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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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.SH SEE ALSO
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.ft r
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MPI_Info_get
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.br
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MPI_Info_get_nthkey
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.br
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MPI_Info_get_valueln
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.br
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