Reference documentation for deal.II version GIT c1ddcf411d 20231130 16:30:02+00:00

#include <deal.II/multigrid/mg_constrained_dofs.h>
Public Types  
using  size_dof = std::vector< std::set< types::global_dof_index > >::size_type 
Public Member Functions  
template<int dim, int spacedim>  
void  initialize (const DoFHandler< dim, spacedim > &dof, const MGLevelObject< IndexSet > &level_relevant_dofs=MGLevelObject< IndexSet >()) 
template<int dim, int spacedim>  
void  make_zero_boundary_constraints (const DoFHandler< dim, spacedim > &dof, const std::set< types::boundary_id > &boundary_ids, const ComponentMask &component_mask={}) 
template<int dim, int spacedim>  
void  add_boundary_indices (const DoFHandler< dim, spacedim > &dof, const unsigned int level, const IndexSet &boundary_indices) 
void  add_user_constraints (const unsigned int level, const AffineConstraints< double > &constraints_on_level) 
template<int dim, int spacedim>  
void  make_no_normal_flux_constraints (const DoFHandler< dim, spacedim > &dof, const types::boundary_id bid, const unsigned int first_vector_component) 
void  clear_user_constraints () 
void  clear () 
bool  is_boundary_index (const unsigned int level, const types::global_dof_index index) const 
bool  at_refinement_edge (const unsigned int level, const types::global_dof_index index) const 
bool  is_interface_matrix_entry (const unsigned int level, const types::global_dof_index i, const types::global_dof_index j) const 
const IndexSet &  get_boundary_indices (const unsigned int level) const 
const IndexSet &  get_refinement_edge_indices (unsigned int level) const 
bool  have_boundary_indices () const 
const AffineConstraints< double > &  get_level_constraints (const unsigned int level) const 
const AffineConstraints< double > &  get_user_constraint_matrix (const unsigned int level) const 
template<typename Number >  
void  merge_constraints (AffineConstraints< Number > &constraints, const unsigned int level, const bool add_boundary_indices, const bool add_refinement_edge_indices, const bool add_level_constraints, const bool add_user_constraints) const 
template<class Archive >  
void  serialize (Archive &ar, const unsigned int version) 
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 ::ExceptionBase &  ExcInUse (int arg1, std::string arg2, std::string arg3) 
static ::ExceptionBase &  ExcNoSubscriber (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  
std::vector< IndexSet >  boundary_indices 
std::vector< IndexSet >  refinement_edge_indices 
std::vector< AffineConstraints< double > >  level_constraints 
std::vector< AffineConstraints< double > >  user_constraints 
std::atomic< unsigned int >  counter 
std::map< std::string, unsigned int >  counter_map 
std::vector< std::atomic< bool > * >  validity_pointers 
const std::type_info *  object_info 
Static Private Attributes  
static std::mutex  mutex 
Collection of boundary constraints and refinement edge constraints for level vectors.
Definition at line 45 of file mg_constrained_dofs.h.
using MGConstrainedDoFs::size_dof = std::vector<std::set<types::global_dof_index> >::size_type 
Definition at line 48 of file mg_constrained_dofs.h.

privateinherited 
The data type used in counter_map.
Definition at line 230 of file subscriptor.h.

privateinherited 
The iterator type used in counter_map.
Definition at line 235 of file subscriptor.h.
void MGConstrainedDoFs::initialize  (  const DoFHandler< dim, spacedim > &  dof, 
const MGLevelObject< IndexSet > &  level_relevant_dofs = MGLevelObject<IndexSet>() 

) 
Fill the internal data structures with hanging node constraints extracted from the dof handler object. Works with natural boundary conditions only. There exists a sister function setting up boundary constraints as well.
This function ensures that on every level, degrees of freedom at interior edges of a refinement level are treated corrected but leaves degrees of freedom at the boundary of the domain untouched assuming that no Dirichlet boundary conditions for them exist.
Furthermore, this call sets up an AffineConstraints object on each level that contains possible periodicity constraints in case those have been added to the underlying triangulation. The AffineConstraints object can be queried by get_level_constraints(level). Note that the current implementation of periodicity constraints in this class does not support rotation matrices in the periodicity definition, i.e., the respective argument in the GridTools::collect_periodic_faces() may not be different from the identity matrix. If no level_relevant_dofs are passed as the second argument, the function uses the locally relevant level DoFs, extracted by DoFTools::extract_locally_relevant_level_dofs(). Otherwise, the userprovided IndexSets, which should define a superset of locally relevant DoFs, are used on each level to allow the user to add additional indices to the set of constrained DoFs.
Definition at line 29 of file mg_constrained_dofs.cc.
void MGConstrainedDoFs::make_zero_boundary_constraints  (  const DoFHandler< dim, spacedim > &  dof, 
const std::set< types::boundary_id > &  boundary_ids,  
const ComponentMask &  component_mask = {} 

) 
Fill the internal data structures with information about Dirichlet boundary dofs.
The initialize() function has to be called before to set hanging node constraints.
This function can be called multiple times to allow considering different sets of boundary_ids for different components.
Definition at line 114 of file mg_constrained_dofs.cc.
void MGConstrainedDoFs::add_boundary_indices  (  const DoFHandler< dim, spacedim > &  dof, 
const unsigned int  level,  
const IndexSet &  boundary_indices  
) 
Add Dirichlet boundary dofs to the internal data structures on level level
. The indices are restricted to the set of locally relevant level dofs.
Definition at line 136 of file mg_constrained_dofs.cc.
void MGConstrainedDoFs::add_user_constraints  (  const unsigned int  level, 
const AffineConstraints< double > &  constraints_on_level  
) 
Add user defined constraints to be used on level level
.
The user can call this function multiple times and any new, conflicting constraints will overwrite the previous constraints for that DoF.
Before the transfer, the user defined constraints will be distributed to the source vector, and then any DoF index set using make_zero_boundary_constraints() will be overwritten with value zero.
Definition at line 209 of file mg_constrained_dofs.cc.
void MGConstrainedDoFs::make_no_normal_flux_constraints  (  const DoFHandler< dim, spacedim > &  dof, 
const types::boundary_id  bid,  
const unsigned int  first_vector_component  
) 
Fill the internal data structures with information about no normal flux boundary dofs.
This function is limited to meshes whose no normal flux boundaries have faces which are normal to the x, y, or zaxis. Also, for a specific boundary id, all faces must be facing in the same direction, i.e., a boundary normal to the xaxis must have a different boundary id than a boundary normal to the y or zaxis and so on. If the mesh was produced, for example, using the GridGenerator::hyper_cube()
function, setting colorize=true
during mesh generation and calling make_no_normal_flux_constraints() for each no normal flux boundary is sufficient.
Definition at line 155 of file mg_constrained_dofs.cc.
void MGConstrainedDoFs::clear_user_constraints  (  ) 
Clear the user constraints on all levels.
Definition at line 231 of file mg_constrained_dofs.cc.
void MGConstrainedDoFs::clear  (  ) 
Reset the data structures.
Definition at line 240 of file mg_constrained_dofs.cc.

inline 
Determine whether a dof index is subject to a boundary constraint.
Definition at line 274 of file mg_constrained_dofs.h.

inline 
Determine whether a dof index is at the refinement edge.
Definition at line 287 of file mg_constrained_dofs.h.

inline 
Determine whether the (i,j) entry of the interface matrix on a given level should be set. This is taken in terms of dof i, that is, return true if i is at a refinement edge, j is not, and both are not on the external boundary.
Definition at line 298 of file mg_constrained_dofs.h.

inline 
Return the indices of level dofs on the given level that are subject to Dirichlet boundary conditions (as set by the function_map
parameter in initialize()). The indices are restricted to the set of locally relevant level dofs.
Definition at line 315 of file mg_constrained_dofs.h.

inline 
Return the indices of dofs on the given level that lie on an refinement edge (dofs on faces to neighbors that are coarser).
Definition at line 324 of file mg_constrained_dofs.h.

inline 
Return if Dirichlet boundary indices are set in initialize().
Definition at line 333 of file mg_constrained_dofs.h.

inline 
Return the AffineConstraints object for a given level, containing periodicity constraints (if enabled on the triangulation).
Definition at line 341 of file mg_constrained_dofs.h.

inline 
Return the user defined constraint matrix for a given level. These constraints are set using the function add_user_constraints() and should not contain constraints for DoF indices set in make_zero_boundary_constraints() as they will be overwritten during the transfer.
Definition at line 350 of file mg_constrained_dofs.h.
void MGConstrainedDoFs::merge_constraints  (  AffineConstraints< Number > &  constraints, 
const unsigned int  level,  
const bool  add_boundary_indices,  
const bool  add_refinement_edge_indices,  
const bool  add_level_constraints,  
const bool  add_user_constraints  
)  const 
Merge selected constraints of a specified level
into a given single AffineConstraints object.
constraints  AffineConstraints object to be filled. 
level  Refinement to be considered. 
add_boundary_indices  Add boundary indices. 
add_refinement_edge_indices  Add refinementedge indices. 
add_level_constraints  Add level constraints including the one passed during initialize() and periodicy constraints. 
add_user_constraints  Add user constraints. 
Definition at line 251 of file mg_constrained_dofs.cc.

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 136 of file subscriptor.cc.

inherited 
Unsubscribes a user from the object.
identifier
and the validity
pointer must be the same as the one supplied to subscribe(). Definition at line 156 of file subscriptor.cc.

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 301 of file subscriptor.h.

inlineinherited 
List the subscribers to the input stream
.
Definition at line 318 of file subscriptor.h.

inherited 
List the subscribers to deallog
.
Definition at line 204 of file subscriptor.cc.

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 310 of file subscriptor.h.

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.
Definition at line 53 of file subscriptor.cc.

private 
The indices of boundary dofs for each level.
Definition at line 251 of file mg_constrained_dofs.h.

private 
The degrees of freedom on a given level that live on the refinement edge between the level and cells on a coarser level.
Definition at line 257 of file mg_constrained_dofs.h.

private 
Constraint matrices containing information regarding potential periodic boundary conditions for each level .
Definition at line 263 of file mg_constrained_dofs.h.

private 
Constraint matrices defined by user.
Definition at line 268 of file mg_constrained_dofs.h.

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 219 of file subscriptor.h.

mutableprivateinherited 
In this map, we count subscriptions for each different identification string supplied to subscribe().
Definition at line 225 of file subscriptor.h.

mutableprivateinherited 
In this vector, we store pointers to the validity bool in the SmartPointer objects that subscribe to this class.
Definition at line 241 of file subscriptor.h.

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 249 of file subscriptor.h.

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 272 of file subscriptor.h.