73 строки
2.5 KiB
Groff
73 строки
2.5 KiB
Groff
.\"Copyright 2006, Sun Microsystems, Inc. All rights reserved. Use is subject to license terms.
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.\" Copyright (c) 1996 Thinking Machines Corporation
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.TH MPI_Group_incl 3OpenMPI "September 2006" "Open MPI 1.2" " "
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.SH NAME
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\fBMPI_Group_incl \fP \- Produces a group by reordering an existing group and taking only listed members.
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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_Group_incl(MPI_Group \fIgroup\fP, int\fI n\fP, int\fI *ranks\fP,
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MPI_Group\fI *newgroup\fP)
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.SH Fortran Syntax
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.nf
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INCLUDE 'mpif.h'
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MPI_GROUP_INCL(\fIGROUP, N, RANKS, NEWGROUP, IERROR\fP)
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INTEGER \fIGROUP, N, RANKS(*), NEWGROUP, IERROR\fP
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.SH C++ Syntax
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.nf
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#include <mpi.h>
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Group Group::Incl(int \fIn\fP, const int \fIranks\fP[]) const
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.SH INPUT PARAMETERS
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.ft R
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.TP 1i
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group
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Group (handle).
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.TP 1i
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n
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Number of elements in array ranks (and size of \fInewgroup\fP)(integer).
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.TP 1i
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ranks
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Ranks of processes in group to appear in newgroup (array of integers).
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.SH OUTPUT PARAMETERS
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.ft R
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.TP 1i
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newgroup
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New group derived from above, in the order defined by ranks (handle).
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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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The function MPI_Group_incl creates a group group_out that consists of the n processes in group with ranks rank[0], \&..., rank[n-1]; the process with rank i in group_out is the process with rank ranks[i] in group. Each of the n elements of ranks must be a valid rank in group and all elements must be distinct, or else the program is erroneous. If n = 0, then group_out is MPI_GROUP_EMPTY. This function can, for instance, be used to reorder the elements of a group.
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.SH NOTE
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.ft R
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This implementation does not currently check to ensure that there are no
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duplicates in the list of ranks.
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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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.sp
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MPI_Group_compare
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.br
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MPI_Group_range_incl
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.br
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MPI_Group_free
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' @(#)MPI_Group_incl.3 1.20 06/03/09
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