BandGenLinLapackSolver

#include \(<\tilde{ }\)/system_of_eqn/linearSOE/bandGEN/BandGenLinLapackSolver.h\(>\)

class BandGenLinLapackSolver: public BandGenLinSolver

MovableObject
Solver
LinearSOESolver
BandGenLinSolver

A BandGenLinLapackSolver object can be constructed to solve a BandGenLinSOE object. It obtains the solution by making calls on the the LAPACK library. The class is defined to be a friend of the BandGenLinSOE class (see \(<\)BandGenLinSOE.h\(>\)).

// Constructor

// Destructor

// Public Methods

A unique class tag (defined in \(<\)classTags.h\(>\)) is passed to the BandGenLinSolver constructor. Sets the size of iPiv to \(0\), iPiv being an integer array needed by the LAPACK routines.

Invokes delete on iPiv to free the memory allocated to store the array.

The solver first copies the B vector into X and then solves the BandGenLinSOE system by calling the LAPACK routines dgbsv(), if the system is marked as not having been factored, and dgbtrs() if system is marked as having been factored. If the solution is successfully obtained, i.e. the LAPACK routines return \(0\) in the INFO argument, it marks the system has having been factored and returns \(0\), otherwise it prints a warning message and returns INFO. The solve process changes \(A\) and \(X\).

Is used to construct a 1d integer array, iPiv that is needed by the LAPACK solvers. It checks to see if current size of iPiv is large enough, if not it deletes the cold and creates a larger array. Returns \(0\) if successful, prints a warning message and returns a \(-1\) if not enough memory is available for this new array.

Does nothing but return \(0\).

Does nothing but return \(0\).