This defines the sparsity pattern, or graph, of a sparse matrix. More...

Classes
class	Build
	This helper class can be called on multiple threads to compute the sparsity pattern (or graph) of the sparse matrix resulting from the discretization. More...

class	Graph

class	NonlocalGraph

Typedefs
typedef std::vector< dof_id_type, Threads::scalable_allocator< dof_id_type > >	Row

Functions
template<typename BidirectionalIterator >
static void	sort_row (const BidirectionalIterator begin, BidirectionalIterator middle, const BidirectionalIterator end)
	Splices the two sorted ranges [begin,middle) and [middle,end) into one sorted range [begin,end). More...

void	_dummy_function (void)
	Dummy function that does nothing but can be used to prohibit compiler optimization in some situations where some compilers have optimization bugs. More...

Detailed Description

This defines the sparsity pattern, or graph, of a sparse matrix.

The format is quite simple – the global indices of the nonzero entries in each row are packed into a vector. The global indices (i,j) of the nth nonzero entry of row i are given by j = sparsity_pattern[i][n];

Author: Roy Stogner

Date: 2010

Defines the sparsity pattern of a sparse matrix.

Typedef Documentation

◆ Row

typedef std::vector<dof_id_type, Threads::scalable_allocator<dof_id_type> > libMesh::SparsityPattern::Row

Definition at line 51 of file sparsity_pattern.h.

Function Documentation

◆ _dummy_function()

void libMesh::SparsityPattern::_dummy_function ( void )

Dummy function that does nothing but can be used to prohibit compiler optimization in some situations where some compilers have optimization bugs.

Definition at line 84 of file sparsity_pattern.C.

84 {}

◆ sort_row()

template<typename BidirectionalIterator >

static void libMesh::SparsityPattern::sort_row	(	const BidirectionalIterator	begin,
		BidirectionalIterator	middle,
		const BidirectionalIterator	end
	)

static

Splices the two sorted ranges [begin,middle) and [middle,end) into one sorted range [begin,end).

This method is much like std::inplace_merge except it assumes the intersection of the two sorted ranges is empty and that any element in each range occurs only once in that range. Additionally, this sort occurs in-place, while std::inplace_merge may use a temporary buffer.

Referenced by libMesh::SparsityPattern::Build::handle_vi_vj().

Classes