xt_idxsection.h File Reference

#include "xt/xt_idxlist.h"

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Functions
Xt_idxlist	xt_idxsection_new (Xt_int start, int num_dimensions, const Xt_int global_size[num_dimensions], const int local_size[num_dimensions], const Xt_int local_start[num_dimensions])
Xt_idxlist	xt_idxsection_unpack (void *buffer, int buffer_size, int *position, MPI_Comm comm)

Detailed Description

Copyright

Copyright (C) 2016 Jörg Behrens behre.nosp@m.ns@d.nosp@m.krz.d.nosp@m.e Moritz Hanke hanke.nosp@m.@dkr.nosp@m.z.de Thomas Jahns jahns.nosp@m.@dkr.nosp@m.z.de

Author

Jörg Behrens behre.nosp@m.ns@d.nosp@m.krz.d.nosp@m.e Moritz Hanke hanke.nosp@m.@dkr.nosp@m.z.de Thomas Jahns jahns.nosp@m.@dkr.nosp@m.z.de

Definition in file xt_idxsection.h.

Function Documentation

xt_idxsection_new()

Xt_idxlist xt_idxsection_new	(	Xt_int	start,
		int	num_dimensions,
		const Xt_int	global_size[num_dimensions],
		const int	local_size[num_dimensions],
		const Xt_int	local_start[num_dimensions]
	)

generates an index list that is comprised of a section of a set of indices that are arranged in an n-dimensional cartesian coordinate system. The linear index correspondence is computed such that the right-most dimension is the one where indices increase fastest (i.e. according to C convention).

Parameters

[in]	start	lowest index of the global array (typically 0 or 1)
[in]	num_dimensions	number of dimensions
[in]	global_size	global size of each dimension
[in]	local_size	size of the local section in each dimension
[in]	local_start	vector with the lowest position in each dimension of the local window within the global index space

Remarks

Negative values for global_size and local_size are allowed. Negative signs do not change the set of selected indices, only their ordering (see Negative global and local sizes).

Examples:

idxlist_examples.c, idxsection_examples.c, test_idxlist_collection.c, test_idxsection.c, test_redist_collection_parallel.c, test_redist_collection_static_parallel.c, test_redist_repeat_parallel.c, and test_uid.c.

Definition at line 199 of file xt_idxsection.c.

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xt_idxsection_unpack()

Xt_idxlist xt_idxsection_unpack	(	void *	buffer,
		int	buffer_size,
		int *	position,
		MPI_Comm	comm
	)

Definition at line 346 of file xt_idxsection.c.

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