petsc-3.7.7 2017-09-25

PCSHELL

Creates a new preconditioner class for use with your own private data storage format. >

            extern PetscErrorCode apply(PC,Vec,Vec);

            extern PetscErrorCode applyba(PC,PCSide,Vec,Vec,Vec);

            extern PetscErrorCode applytranspose(PC,Vec,Vec);

            extern PetscErrorCode setup(PC);

            extern PetscErrorCode destroy(PC);

            PCCreate(comm,&pc);

            PCSetType(pc,PCSHELL);

            PCShellSetContext(pc,ctx)

            PCShellSetApply(pc,apply);

            PCShellSetApplyBA(pc,applyba);               (optional)

            PCShellSetApplyTranspose(pc,applytranspose); (optional)

            PCShellSetSetUp(pc,setup);                   (optional)

            PCShellSetDestroy(pc,destroy);               (optional)