A0 Struct Reference

#include <assembly.h>

Inheritance diagram for A0:

Public Member Functions
virtual void	interior_assembly (FEMContext &c)
	Perform the element interior assembly.
virtual void	interior_assembly (FEMContext &c)
	Perform the element interior assembly.
virtual void	interior_assembly (FEMContext &c)
	Perform the element interior assembly.
virtual void	interior_assembly (FEMContext &c)
	Perform the element interior assembly.
virtual void	interior_assembly (FEMContext &c)
	Perform the element interior assembly.
virtual void	boundary_assembly (FEMContext &)
	Perform the element boundary assembly.
virtual void	get_nodal_values (std::vector< dof_id_type > &, DenseMatrix< Number > &, DenseVector< Number > &, const System &, const Node &)
	Get values to add to the matrix or rhs vector based on node.

Static Public Member Functions
static std::string	get_info ()
	Gets a string containing the reference information.
static void	print_info (std::ostream &out_stream=libMesh::out)
	Prints the reference information, by default to libMesh::out.
static unsigned int	n_objects ()
	Prints the number of outstanding (created, but not yet destroyed) objects.
static void	enable_print_counter_info ()
	Methods to enable/disable the reference counter output from print_info().
static void	disable_print_counter_info ()

Protected Types
typedef std::map< std::string, std::pair< unsigned int, unsigned int > >	Counts
	Data structure to log the information.

Protected Member Functions
void	increment_constructor_count (const std::string &name) noexcept
	Increments the construction counter.
void	increment_destructor_count (const std::string &name) noexcept
	Increments the destruction counter.

Static Protected Attributes
static Counts	_counts
	Actually holds the data.
static Threads::atomic< unsigned int >	_n_objects
	The number of objects.
static Threads::spin_mutex	_mutex
	Mutual exclusion object to enable thread-safe reference counting.
static bool	_enable_print_counter = true
	Flag to control whether reference count information is printed when print_info is called.

Detailed Description

Definition at line 39 of file assembly.h.

Member Typedef Documentation

Counts

typedef std::map<std::string, std::pair<unsigned int, unsigned int> > libMesh::ReferenceCounter::Counts

protectedinherited

Data structure to log the information.

The log is identified by the class name.

Definition at line 119 of file reference_counter.h.

Member Function Documentation

boundary_assembly()

virtual void libMesh::ElemAssembly::boundary_assembly ( FEMContext &  )

inlinevirtualinherited

Perform the element boundary assembly.

Reimplemented in AssemblyF0, AssemblyF1, AssemblyF2, AssemblyA0, AssemblyA1, AssemblyA2, A2, A3, F0, and Output0.

Definition at line 60 of file elem_assembly.h.

{ }

Referenced by libMesh::RBConstruction::add_scaled_matrix_and_vector().

disable_print_counter_info()

void libMesh::ReferenceCounter::disable_print_counter_info ( )

staticinherited

Definition at line 100 of file reference_counter.C.

{
  _enable_print_counter = false;
  return;
}

References libMesh::ReferenceCounter::_enable_print_counter.

enable_print_counter_info()

void libMesh::ReferenceCounter::enable_print_counter_info ( )

staticinherited

Methods to enable/disable the reference counter output from print_info().

Enabled by default.

Definition at line 94 of file reference_counter.C.

{
  _enable_print_counter = true;
  return;
}

References libMesh::ReferenceCounter::_enable_print_counter.

Referenced by libMesh::LibMeshInit::~LibMeshInit().

get_info()

std::string libMesh::ReferenceCounter::get_info ( )

staticinherited

Gets a string containing the reference information.

Definition at line 47 of file reference_counter.C.

{
#if defined(LIBMESH_ENABLE_REFERENCE_COUNTING) && defined(DEBUG)
 
  std::ostringstream oss;
 
  oss << '\n'
      << " ---------------------------------------------------------------------------- \n"
      << "| Reference count information                                                |\n"
      << " ---------------------------------------------------------------------------- \n";
 
  for (const auto & [name, cd] : _counts)
    oss << "| " << name << " reference count information:\n"
        << "|  Creations:    " << cd.first    << '\n'
        << "|  Destructions: " << cd.second << '\n';
 
  oss << " ---------------------------------------------------------------------------- \n";
 
  return oss.str();
 
#else
 
  return "";
 
#endif
}

References libMesh::ReferenceCounter::_counts.

Referenced by libMesh::ReferenceCounter::print_info().

get_nodal_values()

virtual void libMesh::ElemAssembly::get_nodal_values ( std::vector< dof_id_type > &  , DenseMatrix< Number > &  , DenseVector< Number > &  , const System &  , const Node &    )

inlinevirtualinherited

Get values to add to the matrix or rhs vector based on node.

This allows one to impose point loads or springs, for example.

Definition at line 67 of file elem_assembly.h.

  {
    // Do nothing by default
  }

Referenced by libMesh::RBConstruction::add_scaled_matrix_and_vector().

increment_constructor_count()

void libMesh::ReferenceCounter::increment_constructor_count ( const std::string &  name )

inlineprotectednoexceptinherited

Increments the construction counter.

Should be called in the constructor of any derived class that will be reference counted.

Definition at line 183 of file reference_counter.h.

{
  libmesh_try
  {
    Threads::spin_mutex::scoped_lock lock(Threads::spin_mtx);
    std::pair<unsigned int, unsigned int> & p = _counts[name];
    p.first++;
  }
  libmesh_catch (...)
  {
    auto stream = libMesh::err.get();
    stream->exceptions(stream->goodbit); // stream must not throw
    libMesh::err << "Encountered unrecoverable error while calling "
                 << "ReferenceCounter::increment_constructor_count() "
                 << "for a(n) " << name << " object." << std::endl;
    std::terminate();
  }
}

References libMesh::err, libMesh::BasicOStreamProxy< charT, traits >::get(), and libMesh::Threads::spin_mtx.

Referenced by libMesh::ReferenceCountedObject< T >::ReferenceCountedObject(), libMesh::ReferenceCountedObject< T >::ReferenceCountedObject(), and libMesh::ReferenceCountedObject< T >::ReferenceCountedObject().

increment_destructor_count()

void libMesh::ReferenceCounter::increment_destructor_count ( const std::string &  name )

inlineprotectednoexceptinherited

Increments the destruction counter.

Should be called in the destructor of any derived class that will be reference counted.

Definition at line 207 of file reference_counter.h.

{
  libmesh_try
  {
    Threads::spin_mutex::scoped_lock lock(Threads::spin_mtx);
    std::pair<unsigned int, unsigned int> & p = _counts[name];
    p.second++;
  }
  libmesh_catch (...)
  {
    auto stream = libMesh::err.get();
    stream->exceptions(stream->goodbit); // stream must not throw
    libMesh::err << "Encountered unrecoverable error while calling "
                 << "ReferenceCounter::increment_destructor_count() "
                 << "for a(n) " << name << " object." << std::endl;
    std::terminate();
  }
}

References libMesh::err, libMesh::BasicOStreamProxy< charT, traits >::get(), and libMesh::Threads::spin_mtx.

Referenced by libMesh::ReferenceCountedObject< T >::~ReferenceCountedObject().

interior_assembly() [1/5]

virtual void A0::interior_assembly ( FEMContext &  )

inlinevirtual

Perform the element interior assembly.

Reimplemented from libMesh::ElemAssembly.

Definition at line 42 of file assembly.h.

  {
    const unsigned int u_var = 0;
 
    FEBase * elem_fe = nullptr;
    c.get_element_fe(u_var, elem_fe);
 
    const std::vector<Real> & JxW = elem_fe->get_JxW();
 
    // The velocity shape function gradients at interior
    // quadrature points.
    const std::vector<std::vector<RealGradient>> & dphi = elem_fe->get_dphi();
 
    // The number of local degrees of freedom in each variable
    const unsigned int n_u_dofs = c.get_dof_indices(u_var).size();
 
    // Now we will build the affine operator
    unsigned int n_qpoints = c.get_element_qrule().n_points();
 
    for (unsigned int qp=0; qp != n_qpoints; qp++)
      for (unsigned int i=0; i != n_u_dofs; i++)
        for (unsigned int j=0; j != n_u_dofs; j++)
          c.get_elem_jacobian()(i,j) += JxW[qp] * dphi[j][qp]*dphi[i][qp];
  }

References libMesh::DiffContext::get_dof_indices(), libMesh::DiffContext::get_elem_jacobian(), libMesh::FEMContext::get_element_fe(), libMesh::FEMContext::get_element_qrule(), and libMesh::QBase::n_points().

interior_assembly() [2/5]

virtual void A0::interior_assembly ( FEMContext &  )

inlinevirtual

Perform the element interior assembly.

Reimplemented from libMesh::ElemAssembly.

Definition at line 74 of file assembly.h.

  {
    const unsigned int u_var = 0;
 
    FEBase * elem_fe = nullptr;
    c.get_element_fe(u_var, elem_fe);
 
    const std::vector<Real> & JxW = elem_fe->get_JxW();
 
    // The velocity shape function gradients at interior
    // quadrature points.
    const std::vector<std::vector<RealGradient>> & dphi = elem_fe->get_dphi();
 
    // The number of local degrees of freedom in each variable
    const unsigned int n_u_dofs = c.get_dof_indices(u_var).size();
 
    // Now we will build the affine operator
    unsigned int n_qpoints = c.get_element_qrule().n_points();
 
    Real
      min_x=0.,
      max_x=0.5;
 
    Point avg = c.get_elem().vertex_average();
    if ((min_x <= avg(0)) && (avg(0) < max_x))
      for (unsigned int qp=0; qp != n_qpoints; qp++)
        for (unsigned int i=0; i != n_u_dofs; i++)
          for (unsigned int j=0; j != n_u_dofs; j++)
            c.get_elem_jacobian()(i,j) += JxW[qp] * dphi[j][qp]*dphi[i][qp];
  }

References libMesh::DiffContext::get_dof_indices(), libMesh::FEMContext::get_elem(), libMesh::DiffContext::get_elem_jacobian(), libMesh::FEMContext::get_element_fe(), libMesh::FEMContext::get_element_qrule(), libMesh::QBase::n_points(), and libMesh::Elem::vertex_average().

interior_assembly() [3/5]

virtual void A0::interior_assembly ( FEMContext &  )

inlinevirtual

Perform the element interior assembly.

Reimplemented from libMesh::ElemAssembly.

Definition at line 70 of file assembly.h.

  {
    const unsigned int u_var = 0;
 
    FEBase * elem_fe = nullptr;
    c.get_element_fe(u_var, elem_fe);
 
    const std::vector<Real> & JxW = elem_fe->get_JxW();
 
    // The velocity shape function gradients at interior
    // quadrature points.
    const std::vector<std::vector<RealGradient>> & dphi = elem_fe->get_dphi();
 
    // The number of local degrees of freedom in each variable
    const unsigned int n_u_dofs = c.get_dof_indices(u_var).size();
 
    // Now we will build the affine operator
    unsigned int n_qpoints = c.get_element_qrule().n_points();
 
    for (unsigned int qp=0; qp != n_qpoints; qp++)
      for (unsigned int i=0; i != n_u_dofs; i++)
        for (unsigned int j=0; j != n_u_dofs; j++)
          c.get_elem_jacobian()(i,j) += JxW[qp] * dphi[j][qp]*dphi[i][qp];
  }

References libMesh::DiffContext::get_dof_indices(), libMesh::DiffContext::get_elem_jacobian(), libMesh::FEMContext::get_element_fe(), libMesh::FEMContext::get_element_qrule(), and libMesh::QBase::n_points().

interior_assembly() [4/5]

virtual void A0::interior_assembly ( FEMContext &  )

inlinevirtual

Perform the element interior assembly.

Reimplemented from libMesh::ElemAssembly.

Definition at line 141 of file assembly.h.

  {
    const unsigned int u_var = 0;
 
    FEBase * elem_fe = nullptr;
    c.get_element_fe(u_var, elem_fe);
 
    const std::vector<Real> & JxW = elem_fe->get_JxW();
 
    // The velocity shape function gradients at interior
    // quadrature points.
    const std::vector<std::vector<RealGradient>> & dphi = elem_fe->get_dphi();
 
    // The number of local degrees of freedom in each variable
    const unsigned int n_u_dofs = c.get_dof_indices(u_var).size();
 
    // Now we will build the affine operator
    unsigned int n_qpoints = c.get_element_qrule().n_points();
 
    for (unsigned int qp=0; qp != n_qpoints; qp++)
      for (unsigned int i=0; i != n_u_dofs; i++)
        for (unsigned int j=0; j != n_u_dofs; j++)
          c.get_elem_jacobian()(i,j) += JxW[qp] * dphi[j][qp]*dphi[i][qp];
  }

References libMesh::DiffContext::get_dof_indices(), libMesh::DiffContext::get_elem_jacobian(), libMesh::FEMContext::get_element_fe(), libMesh::FEMContext::get_element_qrule(), and libMesh::QBase::n_points().

interior_assembly() [5/5]

virtual void A0::interior_assembly ( FEMContext &  )

inlinevirtual

Perform the element interior assembly.

Reimplemented from libMesh::ElemAssembly.

Definition at line 120 of file assembly.h.

  {
    const unsigned int p_var = 0;
 
    FEBase * elem_fe = nullptr;
    c.get_element_fe(p_var, elem_fe);
 
    const std::vector<Real> & JxW = elem_fe->get_JxW();
 
    // The velocity shape function gradients at interior
    // quadrature points.
    const std::vector<std::vector<RealGradient>> & dphi = elem_fe->get_dphi();
 
    // The number of local degrees of freedom in each variable
    const unsigned int n_p_dofs = c.get_dof_indices(p_var).size();
 
    // Now we will build the affine operator
    unsigned int n_qpoints = c.get_element_qrule().n_points();
 
    for (unsigned int qp=0; qp != n_qpoints; qp++)
      for (unsigned int i=0; i != n_p_dofs; i++)
        for (unsigned int j=0; j != n_p_dofs; j++)
          c.get_elem_jacobian()(i,j) += JxW[qp] * (dphi[j][qp]*dphi[i][qp]);
  }

References libMesh::DiffContext::get_dof_indices(), libMesh::DiffContext::get_elem_jacobian(), libMesh::FEMContext::get_element_fe(), libMesh::FEMContext::get_element_qrule(), and libMesh::QBase::n_points().

n_objects()

static unsigned int libMesh::ReferenceCounter::n_objects ( )

inlinestaticinherited

Prints the number of outstanding (created, but not yet destroyed) objects.

Definition at line 85 of file reference_counter.h.

  { return _n_objects; }

References libMesh::ReferenceCounter::_n_objects.

Referenced by libMesh::LibMeshInit::~LibMeshInit().

print_info()

void libMesh::ReferenceCounter::print_info ( std::ostream &  out_stream = libMesh::out )

staticinherited

Prints the reference information, by default to libMesh::out.

Definition at line 81 of file reference_counter.C.

{
  if (_enable_print_counter)
    out_stream << ReferenceCounter::get_info();
}

References libMesh::ReferenceCounter::_enable_print_counter, and libMesh::ReferenceCounter::get_info().

Referenced by libMesh::LibMeshInit::~LibMeshInit().

Member Data Documentation

_counts

ReferenceCounter::Counts libMesh::ReferenceCounter::_counts

staticprotectedinherited

Actually holds the data.

Definition at line 124 of file reference_counter.h.

Referenced by libMesh::ReferenceCounter::get_info().

_enable_print_counter

bool libMesh::ReferenceCounter::_enable_print_counter = true

staticprotectedinherited

Flag to control whether reference count information is printed when print_info is called.

Definition at line 143 of file reference_counter.h.

Referenced by libMesh::ReferenceCounter::disable_print_counter_info(), libMesh::ReferenceCounter::enable_print_counter_info(), and libMesh::ReferenceCounter::print_info().

_mutex

Threads::spin_mutex libMesh::ReferenceCounter::_mutex

staticprotectedinherited

Mutual exclusion object to enable thread-safe reference counting.

Definition at line 137 of file reference_counter.h.

_n_objects

Threads::atomic< unsigned int > libMesh::ReferenceCounter::_n_objects

staticprotectedinherited

The number of objects.

Print the reference count information when the number returns to 0.

Definition at line 132 of file reference_counter.h.

Referenced by libMesh::ReferenceCounter::n_objects(), libMesh::ReferenceCounter::ReferenceCounter(), libMesh::ReferenceCounter::ReferenceCounter(), libMesh::ReferenceCounter::ReferenceCounter(), and libMesh::ReferenceCounter::~ReferenceCounter().

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The documentation for this struct was generated from the following files:

• examples/reduced_basis/reduced_basis_ex1/assembly.h
• examples/reduced_basis/reduced_basis_ex2/assembly.h
• examples/reduced_basis/reduced_basis_ex3/assembly.h
• examples/reduced_basis/reduced_basis_ex4/assembly.h
• examples/reduced_basis/reduced_basis_ex7/assembly.h