Reference documentation for deal.II version 9.6.0
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CompositionManifold< dim, spacedim, chartdim, intermediate_dim, dim1, dim2 > Class Template Reference

#include <deal.II/grid/composition_manifold.h>

Inheritance diagram for CompositionManifold< dim, spacedim, chartdim, intermediate_dim, dim1, dim2 >:

Public Types

using FaceVertexNormals
 

Public Member Functions

 CompositionManifold (const ChartManifold< dim1, intermediate_dim, chartdim > &F, const ChartManifold< dim2, spacedim, intermediate_dim > &G)
 
virtual std::unique_ptr< Manifold< dim, spacedim > > clone () const override
 
virtual Point< chartdim > pull_back (const Point< spacedim > &space_point) const
 
virtual Point< spacedim > push_forward (const Point< chartdim > &chart_point) const
 
virtual DerivativeForm< 1, chartdim, spacedim > push_forward_gradient (const Point< chartdim > &chart_point) const
 
virtual Point< spacedim > get_intermediate_point (const Point< spacedim > &p1, const Point< spacedim > &p2, const double w) const override
 
virtual Point< spacedim > get_new_point (const ArrayView< const Point< spacedim > > &surrounding_points, const ArrayView< const double > &weights) const override
 
virtual void get_new_points (const ArrayView< const Point< spacedim > > &surrounding_points, const Table< 2, double > &weights, ArrayView< Point< spacedim > > new_points) const override
 
virtual Tensor< 1, spacedim > get_tangent_vector (const Point< spacedim > &x1, const Point< spacedim > &x2) const override
 
const Tensor< 1, chartdim > & get_periodicity () const
 
template<class Archive >
void serialize (Archive &ar, const unsigned int version)
 
Computing the location of points.
virtual Point< spacedim > project_to_manifold (const ArrayView< const Point< spacedim > > &surrounding_points, const Point< spacedim > &candidate) const
 
virtual Point< spacedim > get_new_point_on_line (const typename Triangulation< dim, spacedim >::line_iterator &line) const
 
virtual Point< spacedim > get_new_point_on_quad (const typename Triangulation< dim, spacedim >::quad_iterator &quad) const
 
virtual Point< spacedim > get_new_point_on_hex (const typename Triangulation< dim, spacedim >::hex_iterator &hex) const
 
Point< spacedim > get_new_point_on_face (const typename Triangulation< dim, spacedim >::face_iterator &face) const
 
Point< spacedim > get_new_point_on_cell (const typename Triangulation< dim, spacedim >::cell_iterator &cell) const
 
Computing normal vectors
virtual Tensor< 1, spacedim > normal_vector (const typename Triangulation< dim, spacedim >::face_iterator &face, const Point< spacedim > &p) const
 
virtual void get_normals_at_vertices (const typename Triangulation< dim, spacedim >::face_iterator &face, FaceVertexNormals &face_vertex_normals) const
 
Subscriptor functionality

Classes derived from Subscriptor provide a facility to subscribe to this object. This is mostly used by the SmartPointer class.

void subscribe (std::atomic< bool > *const validity, const std::string &identifier="") const
 
void unsubscribe (std::atomic< bool > *const validity, const std::string &identifier="") const
 
unsigned int n_subscriptions () const
 
template<typename StreamType >
void list_subscribers (StreamType &stream) const
 
void list_subscribers () const
 

Static Public Member Functions

static ::ExceptionBaseExcInUse (int arg1, std::string arg2, std::string arg3)
 
static ::ExceptionBaseExcNoSubscriber (std::string arg1, std::string arg2)
 

Private Types

using map_value_type = decltype(counter_map)::value_type
 
using map_iterator = decltype(counter_map)::iterator
 

Private Member Functions

void check_no_subscribers () const noexcept
 

Private Attributes

SmartPointer< const ChartManifold< dim1, intermediate_dim, chartdim >, CompositionManifold< dim, spacedim, chartdim, dim1, dim2, intermediate_dim > > F
 
SmartPointer< const ChartManifold< dim2, spacedim, intermediate_dim >, CompositionManifold< dim, spacedim, chartdim, dim1, dim2, intermediate_dim > > G
 
const FlatManifold< chartdim, chartdim > sub_manifold
 
std::atomic< unsigned intcounter
 
std::map< std::string, unsigned intcounter_map
 
std::vector< std::atomic< bool > * > validity_pointers
 
const std::type_info * object_info
 

Static Private Attributes

static std::mutex mutex
 

Detailed Description

template<int dim, int spacedim = dim, int chartdim = dim, int intermediate_dim = dim, int dim1 = dim, int dim2 = dim>
class CompositionManifold< dim, spacedim, chartdim, intermediate_dim, dim1, dim2 >

CompositionManifold. Take two ChartManifold objects, and make their composition. The CompositionManifold object is a ChartManifold going from the chart of the first ChartManifold to the embedding space of the second ChartManifold. If the first ChartManifold is periodic, so is the resulting ChartManifold, with the same periodicity. Periodicity on the second ChartManifold is not allowed, and the constructor will throw an exception if the second Manifold is periodic.

This class only works for dim <= chartdim <= intermediate_spacedim <= spacedim. If you try to instantiate anything different, an Exception will be thrown in one of the ChartManifold classes that violates this condition.

Given the ChartManifold F and the ChartManifold G, this class represents the composition of G after F.

The template parameters have the following meaning:

Template Parameters
dimThe dimension of the resulting ChartManifold
spacedimThe space dimension of the resulting ChartManifold
chartdimThe chart dimension of the resulting ChartManifold
intermediate_dimThe space dimension of the first ChartManifold
dim1The dimension of the first ChartManifold, which coincides also with the chart dimension of the second ChartManifold
dim2The dimension of the second ChartManifold

Definition at line 73 of file composition_manifold.h.

Member Typedef Documentation

◆ FaceVertexNormals

using Manifold< dim, spacedim >::FaceVertexNormals
inherited

Type keeping information about the normals at the vertices of a face of a cell. Thus, there are GeometryInfo<dim>::vertices_per_face normal vectors, that define the tangent spaces of the boundary at the vertices. Note that the vectors stored in this object are not required to be normalized, nor to actually point outward, as one often will only want to check for orthogonality to define the tangent plane; if a function requires the normals to be normalized, then it must do so itself.

For obvious reasons, this type is not useful in 1d.

Definition at line 305 of file manifold.h.

◆ map_value_type

using Subscriptor::map_value_type = decltype(counter_map)::value_type
privateinherited

The data type used in counter_map.

Definition at line 229 of file subscriptor.h.

◆ map_iterator

using Subscriptor::map_iterator = decltype(counter_map)::iterator
privateinherited

The iterator type used in counter_map.

Definition at line 234 of file subscriptor.h.

Constructor & Destructor Documentation

◆ CompositionManifold()

template<int dim, int spacedim, int chartdim, int intermediate_dim, int dim1, int dim2>
CompositionManifold< dim, spacedim, chartdim, intermediate_dim, dim1, dim2 >::CompositionManifold ( const ChartManifold< dim1, intermediate_dim, chartdim > & F,
const ChartManifold< dim2, spacedim, intermediate_dim > & G )

Construct the composition of the two given manifolds.

Definition at line 139 of file composition_manifold.h.

Member Function Documentation

◆ clone()

template<int dim, int spacedim, int chartdim, int intermediate_dim, int dim1, int dim2>
std::unique_ptr< Manifold< dim, spacedim > > CompositionManifold< dim, spacedim, chartdim, intermediate_dim, dim1, dim2 >::clone ( ) const
overridevirtual

Make a clone of this Manifold.

Implements Manifold< dim, spacedim >.

Definition at line 160 of file composition_manifold.h.

◆ pull_back()

template<int dim, int spacedim, int chartdim, int intermediate_dim, int dim1, int dim2>
Point< chartdim > CompositionManifold< dim, spacedim, chartdim, intermediate_dim, dim1, dim2 >::pull_back ( const Point< spacedim > & space_point) const
virtual

Pull back the given point in spacedim to the Euclidean chartdim dimensional space. This function calls the pull_back() function of G, and then the pull_back() function of F.

Implements ChartManifold< dim, dim, dim >.

Definition at line 176 of file composition_manifold.h.

◆ push_forward()

template<int dim, int spacedim, int chartdim, int intermediate_dim, int dim1, int dim2>
Point< spacedim > CompositionManifold< dim, spacedim, chartdim, intermediate_dim, dim1, dim2 >::push_forward ( const Point< chartdim > & chart_point) const
virtual

Push forward the chartdim dimensional point to a spacedim Euclidean point. The function calls first the push_forward() of F, and then the push_forward() of G.

Implements ChartManifold< dim, dim, dim >.

Definition at line 191 of file composition_manifold.h.

◆ push_forward_gradient()

template<int dim, int spacedim, int chartdim, int intermediate_dim, int dim1, int dim2>
DerivativeForm< 1, chartdim, spacedim > CompositionManifold< dim, spacedim, chartdim, intermediate_dim, dim1, dim2 >::push_forward_gradient ( const Point< chartdim > & chart_point) const
virtual

Return the derivative of the composition of G after F.

Reimplemented from ChartManifold< dim, dim, dim >.

Definition at line 206 of file composition_manifold.h.

◆ get_intermediate_point()

Point< spacedim > ChartManifold< dim, spacedim, chartdim >::get_intermediate_point ( const Point< spacedim > & p1,
const Point< spacedim > & p2,
const double w ) const
overridevirtualinherited

Refer to the general documentation of this class and the documentation of the base class for more information.

Reimplemented from Manifold< dim, spacedim >.

Definition at line 942 of file manifold.cc.

◆ get_new_point()

Point< spacedim > ChartManifold< dim, spacedim, chartdim >::get_new_point ( const ArrayView< const Point< spacedim > > & surrounding_points,
const ArrayView< const double > & weights ) const
overridevirtualinherited

Refer to the general documentation of this class and the documentation of the base class for more information.

Reimplemented from Manifold< dim, spacedim >.

Definition at line 951 of file manifold.cc.

◆ get_new_points()

void ChartManifold< dim, spacedim, chartdim >::get_new_points ( const ArrayView< const Point< spacedim > > & surrounding_points,
const Table< 2, double > & weights,
ArrayView< Point< spacedim > > new_points ) const
overridevirtualinherited

Compute a new set of points that interpolate between the given points surrounding_points. weights is a table with as many columns as surrounding_points.size(). The number of rows in weights must match the length of new_points.

The implementation of this function first transforms the surrounding_points to the chart space by calling pull_back(). Then, new points are computed on the chart by usual interpolation according to the given weights, which are finally transformed to the image space by push_forward().

This implementation can be much more efficient for computing multiple new points from the same surrounding points than separate calls to get_new_point() in case the pull_back() operation is expensive. This is because pull_back() is only called once for the surrounding points and the interpolation is done for all given weights using this set of points. Often, pull_back() is also more expensive than push_forward() because the former might involve some kind of Newton iteration in non-trivial manifolds.

Reimplemented from Manifold< dim, spacedim >.

Definition at line 976 of file manifold.cc.

◆ get_tangent_vector()

Tensor< 1, spacedim > ChartManifold< dim, spacedim, chartdim >::get_tangent_vector ( const Point< spacedim > & x1,
const Point< spacedim > & x2 ) const
overridevirtualinherited

Return a vector that, at \(\mathbf x_1\), is tangential to the geodesic that connects two points \(\mathbf x_1,\mathbf x_2\). See the documentation of the Manifold class and of Manifold::get_tangent_vector() for a more detailed description.

For the current class, we assume that this geodesic is the image under the push_forward() operation of a straight line of the pre-images of x1 and x2 (where pre-images are computed by pulling back the locations x1 and x2). In other words, if these preimages are \(\xi_1=F^{-1}(\mathbf x_1), \xi_2=F^{-1}(\mathbf x_2)\), then the geodesic in preimage (the chartdim-dimensional Euclidean) space is

\begin{align*} \zeta(t) &= \xi_1 + t (\xi_2-\xi_1) \\ &= F^{-1}(\mathbf x_1) + t\left[F^{-1}(\mathbf x_2) -F^{-1}(\mathbf x_1)\right] \end{align*}

In image space, i.e., in the space in which we operate, this leads to the curve

\begin{align*} \mathbf s(t) &= F(\zeta(t)) \\ &= F(\xi_1 + t (\xi_2-\xi_1)) \\ &= F\left(F^{-1}(\mathbf x_1) + t\left[F^{-1}(\mathbf x_2) -F^{-1}(\mathbf x_1)\right]\right). \end{align*}

What the current function is supposed to return is \(\mathbf s'(0)\). By the chain rule, this is equal to

\begin{align*} \mathbf s'(0) &= \frac{d}{dt}\left. F\left(F^{-1}(\mathbf x_1) + t\left[F^{-1}(\mathbf x_2) -F^{-1}(\mathbf x_1)\right]\right) \right|_{t=0} \\ &= \nabla_\xi F\left(F^{-1}(\mathbf x_1)\right) \left[F^{-1}(\mathbf x_2) -F^{-1}(\mathbf x_1)\right]. \end{align*}

This formula may then have to be slightly modified by considering any periodicity that was assumed in the call to the constructor.

Thus, the computation of tangent vectors also requires the implementation of derivatives \(\nabla_\xi F(\xi)\) of the push-forward mapping. Here, \(F^{-1}(\mathbf x_2)-F^{-1}(\mathbf x_1)\) is a chartdim-dimensional vector, and \(\nabla_\xi F\left(F^{-1}(\mathbf x_1)\right) = \nabla_\xi F\left(\xi_1\right)\) is a spacedim-times-chartdim-dimensional matrix. Consequently, and as desired, the operation results in a spacedim-dimensional vector.

Parameters
x1The first point that describes the geodesic, and the one at which the "direction" is to be evaluated.
x2The second point that describes the geodesic.
Returns
A "direction" vector tangential to the geodesic.

Reimplemented from Manifold< dim, spacedim >.

Definition at line 1072 of file manifold.cc.

◆ get_periodicity()

const Tensor< 1, chartdim > & ChartManifold< dim, spacedim, chartdim >::get_periodicity ( ) const
inherited

Return the periodicity associated with the submanifold.

Definition at line 1079 of file manifold.cc.

◆ project_to_manifold()

virtual Point< spacedim > Manifold< dim, spacedim >::project_to_manifold ( const ArrayView< const Point< spacedim > > & surrounding_points,
const Point< spacedim > & candidate ) const
virtualinherited

Given a point which lies close to the given manifold, it modifies it and projects it to manifold itself.

This class is used by the default implementation of the function get_new_point() and should be implemented by derived classes. The default implementation simply throws an exception if called.

If your manifold is simple, you could implement this function only, and the default behavior should work out of the box.

Reimplemented in FlatManifold< chartdim, chartdim >, FlatManifold< dim, dim >, FlatManifold< dim, spacedim >, OpenCASCADE::DirectionalProjectionManifold< dim, spacedim >, OpenCASCADE::NormalProjectionManifold< dim, spacedim >, and OpenCASCADE::NormalToMeshProjectionManifold< dim, spacedim >.

◆ get_new_point_on_line()

virtual Point< spacedim > Manifold< dim, spacedim >::get_new_point_on_line ( const typename Triangulation< dim, spacedim >::line_iterator & line) const
virtualinherited

Backward compatibility interface. Return the point which shall become the new middle vertex of the two children of a regular line. In 2d, this line is a line at the boundary, while in 3d, it is bounding a face at the boundary (the lines therefore is also on the boundary).

The default implementation of this function passes its argument to the Manifolds::get_default_points_and_weights() function, and then calls the Manifold<dim,spacedim>::get_new_point() function. User derived classes can overload Manifold<dim,spacedim>::get_new_point() or Manifold<dim,spacedim>::project_to_manifold(), which is called by the default implementation of Manifold<dim,spacedim>::get_new_point().

◆ get_new_point_on_quad()

virtual Point< spacedim > Manifold< dim, spacedim >::get_new_point_on_quad ( const typename Triangulation< dim, spacedim >::quad_iterator & quad) const
virtualinherited

Backward compatibility interface. Return the point which shall become the common point of the four children of a quad at the boundary in three or more spatial dimensions. This function therefore is only useful in at least three dimensions and should not be called for lower dimensions.

This function is called after the four lines bounding the given quad are refined, so you may want to use the information provided by quad->line(i)->child(j), i=0...3, j=0,1.

The default implementation of this function passes its argument to the Manifolds::get_default_points_and_weights() function, and then calls the Manifold<dim,spacedim>::get_new_point() function. User derived classes can overload Manifold<dim,spacedim>::get_new_point() or Manifold<dim,spacedim>::project_to_manifold(), which is called by the default implementation of Manifold<dim,spacedim>::get_new_point().

◆ get_new_point_on_hex()

virtual Point< spacedim > Manifold< dim, spacedim >::get_new_point_on_hex ( const typename Triangulation< dim, spacedim >::hex_iterator & hex) const
virtualinherited

Backward compatibility interface. Return the point which shall become the common point of the eight children of a hex in three or spatial dimensions. This function therefore is only useful in at least three dimensions and should not be called for lower dimensions.

This function is called after the all the bounding objects of the given hex are refined, so you may want to use the information provided by hex->quad(i)->line(j)->child(k), i=0...5, j=0...3, k=0,1.

The default implementation of this function passes its argument to the Manifolds::get_default_points_and_weights() function, and then calls the Manifold<dim,spacedim>::get_new_point() function. User derived classes can overload Manifold<dim,spacedim>::get_new_point() or Manifold<dim,spacedim>::project_to_manifold(), which is called by the default implementation of Manifold<dim,spacedim>::get_new_point().

◆ get_new_point_on_face()

Point< spacedim > Manifold< dim, spacedim >::get_new_point_on_face ( const typename Triangulation< dim, spacedim >::face_iterator & face) const
inherited

Backward compatibility interface. Depending on dim=2 or dim=3 this function calls the get_new_point_on_line or the get_new_point_on_quad function. It throws an exception for dim=1. This wrapper allows dimension independent programming.

◆ get_new_point_on_cell()

Point< spacedim > Manifold< dim, spacedim >::get_new_point_on_cell ( const typename Triangulation< dim, spacedim >::cell_iterator & cell) const
inherited

Backward compatibility interface. Depending on dim=1, dim=2 or dim=3 this function calls the get_new_point_on_line, get_new_point_on_quad or the get_new_point_on_hex function. This wrapper allows dimension independent programming.

◆ normal_vector()

virtual Tensor< 1, spacedim > Manifold< dim, spacedim >::normal_vector ( const typename Triangulation< dim, spacedim >::face_iterator & face,
const Point< spacedim > & p ) const
virtualinherited

Return the normal vector to a face embedded in this manifold, at the point p. It is not required that the normals actually point outward from the domain even if the face iterator given points to a face on the boundary of the domain. If p is not in fact on the surface, but only close-by, try to return something reasonable, for example the normal vector at the surface point closest to p. (The point p will in fact not normally lie on the actual surface, but rather be a quadrature point mapped by some polynomial mapping; the mapped surface, however, will not usually coincide with the actual surface.)

This function only makes sense if dim==spacedim because otherwise there is no unique normal vector but in fact a (spacedim-dim+1)-dimensional tangent space of vectors that are all both normal to the face and normal to the dim-dimensional surface that lives in spacedim-dimensional space. For example, think of a two-dimensional mesh that covers a two-dimensional surface in three-dimensional space. In that case, each face (edge) is one-dimensional, and there are two linearly independent vectors that are both normal to the edge: one is normal to the edge and tangent to the surface (intuitively, that would be the one that points from the current cell to the neighboring one, if the surface was locally flat), and the other one is rooted in the edge but points perpendicular to the surface (which is also perpendicular to the edge that lives within the surface). Thus, because there are no obviously correct semantics for this function if spacedim is greater than dim, the function will simply throw an error in that situation.

The face iterator gives an indication which face this function is supposed to compute the normal vector for. This is useful if the boundary of the domain is composed of different nondifferential pieces (for example when using the FlatManifold class to approximate a geometry that is completely described by the coarse mesh, with piecewise (bi-)linear components between the vertices, but where the boundary may have a kink at the vertices itself).

Note
In 2d, the default implementation of this function computes the normal vector by taking the tangent direction from p to the further one of the two vertices that make up an edge, and then rotates it outward (with respect to the coordinate system of the edge) by 90 degrees. In 3d, the default implementation is more complicated, aiming at avoiding problems with numerical round-off for points close to one of the vertices, and avoiding tangent directions that are linearly dependent.

Reimplemented in FlatManifold< chartdim, chartdim >, FlatManifold< dim, dim >, FlatManifold< dim, spacedim >, and PolarManifold< dim, spacedim >.

◆ get_normals_at_vertices()

virtual void Manifold< dim, spacedim >::get_normals_at_vertices ( const typename Triangulation< dim, spacedim >::face_iterator & face,
FaceVertexNormals & face_vertex_normals ) const
virtualinherited

Compute the normal vectors to the boundary at each vertex of the given face embedded in the Manifold. It is not required that the normal vectors be normed somehow. Neither is it required that the normals actually point outward.

This function is needed to compute data for C1 mappings. The default implementation calls normal_vector() on each vertex.

Note that when computing normal vectors at a vertex where the boundary is not differentiable, you have to make sure that you compute the one-sided limits, i.e. limit with respect to points inside the given face.

◆ subscribe()

void Subscriptor::subscribe ( std::atomic< bool > *const validity,
const std::string & identifier = "" ) const
inherited

Subscribes a user of the object by storing the pointer validity. The subscriber may be identified by text supplied as identifier.

Definition at line 135 of file subscriptor.cc.

◆ unsubscribe()

void Subscriptor::unsubscribe ( std::atomic< bool > *const validity,
const std::string & identifier = "" ) const
inherited

Unsubscribes a user from the object.

Note
The identifier and the validity pointer must be the same as the one supplied to subscribe().

Definition at line 155 of file subscriptor.cc.

◆ n_subscriptions()

unsigned int Subscriptor::n_subscriptions ( ) const
inlineinherited

Return the present number of subscriptions to this object. This allows to use this class for reference counted lifetime determination where the last one to unsubscribe also deletes the object.

Definition at line 300 of file subscriptor.h.

◆ list_subscribers() [1/2]

template<typename StreamType >
void Subscriptor::list_subscribers ( StreamType & stream) const
inlineinherited

List the subscribers to the input stream.

Definition at line 317 of file subscriptor.h.

◆ list_subscribers() [2/2]

void Subscriptor::list_subscribers ( ) const
inherited

List the subscribers to deallog.

Definition at line 203 of file subscriptor.cc.

◆ serialize()

template<class Archive >
void Subscriptor::serialize ( Archive & ar,
const unsigned int version )
inlineinherited

Read or write the data of this object to or from a stream for the purpose of serialization using the BOOST serialization library.

This function does not actually serialize any of the member variables of this class. The reason is that what this class stores is only who subscribes to this object, but who does so at the time of storing the contents of this object does not necessarily have anything to do with who subscribes to the object when it is restored. Consequently, we do not want to overwrite the subscribers at the time of restoring, and then there is no reason to write the subscribers out in the first place.

Definition at line 309 of file subscriptor.h.

◆ check_no_subscribers()

void Subscriptor::check_no_subscribers ( ) const
privatenoexceptinherited

Check that there are no objects subscribing to this object. If this check passes then it is safe to destroy the current object. It this check fails then this function will either abort or print an error message to deallog (by using the AssertNothrow mechanism), but will not throw an exception.

Note
Since this function is just a consistency check it does nothing in release mode.
If this function is called when there is an uncaught exception then, rather than aborting, this function prints an error message to the standard error stream and returns.

Definition at line 52 of file subscriptor.cc.

Member Data Documentation

◆ F

template<int dim, int spacedim = dim, int chartdim = dim, int intermediate_dim = dim, int dim1 = dim, int dim2 = dim>
SmartPointer< const ChartManifold<dim1, intermediate_dim, chartdim>, CompositionManifold<dim, spacedim, chartdim, dim1, dim2, intermediate_dim> > CompositionManifold< dim, spacedim, chartdim, intermediate_dim, dim1, dim2 >::F
private

The first ChartManifold.

Definition at line 118 of file composition_manifold.h.

◆ G

template<int dim, int spacedim = dim, int chartdim = dim, int intermediate_dim = dim, int dim1 = dim, int dim2 = dim>
SmartPointer< const ChartManifold<dim2, spacedim, intermediate_dim>, CompositionManifold<dim, spacedim, chartdim, dim1, dim2, intermediate_dim> > CompositionManifold< dim, spacedim, chartdim, intermediate_dim, dim1, dim2 >::G
private

The second ChartManifold.

Definition at line 127 of file composition_manifold.h.

◆ sub_manifold

const FlatManifold<chartdim, chartdim> ChartManifold< dim, spacedim, chartdim >::sub_manifold
privateinherited

The sub_manifold object is used to compute the average of the points in the chart coordinates system.

In an ideal world, it would have type FlatManifold<dim,chartdim>. However, this would instantiate cases where dim>spacedim, which leads to invalid situations. We instead use <chartdim,chartdim>, which is (i) always valid, and (ii) does not matter at all since the first (dim) argument of manifolds is, in fact, ignored as far as manifold functionality is concerned.

Definition at line 1093 of file manifold.h.

◆ counter

std::atomic<unsigned int> Subscriptor::counter
mutableprivateinherited

Store the number of objects which subscribed to this object. Initially, this number is zero, and upon destruction it shall be zero again (i.e. all objects which subscribed should have unsubscribed again).

The creator (and owner) of an object is counted in the map below if HE manages to supply identification.

We use the mutable keyword in order to allow subscription to constant objects also.

This counter may be read from and written to concurrently in multithreaded code: hence we use the std::atomic class template.

Definition at line 218 of file subscriptor.h.

◆ counter_map

std::map<std::string, unsigned int> Subscriptor::counter_map
mutableprivateinherited

In this map, we count subscriptions for each different identification string supplied to subscribe().

Definition at line 224 of file subscriptor.h.

◆ validity_pointers

std::vector<std::atomic<bool> *> Subscriptor::validity_pointers
mutableprivateinherited

In this vector, we store pointers to the validity bool in the SmartPointer objects that subscribe to this class.

Definition at line 240 of file subscriptor.h.

◆ object_info

const std::type_info* Subscriptor::object_info
mutableprivateinherited

Pointer to the typeinfo object of this object, from which we can later deduce the class name. Since this information on the derived class is neither available in the destructor, nor in the constructor, we obtain it in between and store it here.

Definition at line 248 of file subscriptor.h.

◆ mutex

std::mutex Subscriptor::mutex
staticprivateinherited

A mutex used to ensure data consistency when accessing the mutable members of this class. This lock is used in the subscribe() and unsubscribe() functions, as well as in list_subscribers().

Definition at line 271 of file subscriptor.h.


The documentation for this class was generated from the following file: