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Reference documentation for deal.II version 8.1.0
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#include <operator.h>
Public Member Functions | |
~Operator () | |
virtual void | operator() (NamedData< VECTOR * > &out, const NamedData< VECTOR * > &in)=0 |
virtual void | notify (const Event &) |
void | clear_events () |
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Subscriptor () | |
Subscriptor (const Subscriptor &) | |
virtual | ~Subscriptor () |
Subscriptor & | operator= (const Subscriptor &) |
void | subscribe (const char *identifier=0) const |
void | unsubscribe (const char *identifier=0) const |
unsigned int | n_subscriptions () const |
void | list_subscribers () const |
DeclException3 (ExcInUse, int, char *, std::string &,<< "Object of class "<< arg2<< " is still used by "<< arg1<< " other objects.\n"<< "(Additional information: "<< arg3<< ")\n"<< "Note the entry in the Frequently Asked Questions of "<< "deal.II (linked to from http://www.dealii.org/) for "<< "more information on what this error means.") | |
DeclException2 (ExcNoSubscriber, char *, char *,<< "No subscriber with identifier \""<< arg2<< "\" did subscribe to this object of class "<< arg1) | |
template<class Archive > | |
void | serialize (Archive &ar, const unsigned int version) |
Protected Attributes | |
Event | notifications |
The abstract base class of all algorithms in this library. An operator is an object with an operator(), which transforms a set of named vectors into another set of named vectors.
Furthermore, an operator can be notified of parameter changes by the calling routine. The outer iteration can notify() the Operator of an Event, which could be for instance a change of mesh, a different time step size or too slow convergence of Newton's method, which would then trigger reassembling of a matrix or similar things.
This is probably the most prominent use for Operator, where an outer iterative method calls an inner solver and so on. Typically, the innermost method in such a nested system will have to compute a residual using values from all outer iterations. Since the depth and order of such a nesting is hardly predictable when designing a general tool, we use NamedData to access these vectors. Typically, the first vector in out
contains the start vector when operator()() is called, and the solution when the function returns. The object in
is providing additional information and forwarded to the inner Operator objects of the nested iteration.
Definition at line 71 of file operator.h.
Algorithms::Operator< VECTOR >::~Operator | ( | ) |
The virtual destructor.
Definition at line 25 of file operator.templates.h.
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pure virtual |
The actual operation, which is implemented in a derived class.
Implemented in Algorithms::ThetaTimestepping< VECTOR >, and Algorithms::Newton< VECTOR >.
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virtual |
Register an event triggered by an outer iteration.
Reimplemented in Algorithms::ThetaTimestepping< VECTOR >, and Algorithms::Newton< VECTOR >.
Definition at line 31 of file operator.templates.h.
void Algorithms::Operator< VECTOR >::clear_events | ( | ) |
Clear all notifications.
Definition at line 39 of file operator.templates.h.
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protected |
Accumulate reasons for reassembling here. If any of those is set, the function solve() of a terminal application must take care of reassembling the matrix.
Definition at line 103 of file operator.h.