1 #define PETSCKSP_DLL 2 3 #include "private/pcimpl.h" /*I "petscpc.h" I*/ 4 5 #undef __FUNCT__ 6 #define __FUNCT__ "PCApply_Mat" 7 static PetscErrorCode PCApply_Mat(PC pc,Vec x,Vec y) 8 { 9 PetscErrorCode ierr; 10 11 PetscFunctionBegin; 12 ierr = MatMult(pc->pmat,x,y);CHKERRQ(ierr); 13 PetscFunctionReturn(0); 14 } 15 16 #undef __FUNCT__ 17 #define __FUNCT__ "PCApplyTranspose_Mat" 18 static PetscErrorCode PCApplyTranspose_Mat(PC pc,Vec x,Vec y) 19 { 20 PetscErrorCode ierr; 21 22 PetscFunctionBegin; 23 ierr = MatMultTranspose(pc->pmat,x,y);CHKERRQ(ierr); 24 PetscFunctionReturn(0); 25 } 26 27 #undef __FUNCT__ 28 #define __FUNCT__ "PCDestroy_Mat" 29 static PetscErrorCode PCDestroy_Mat(PC pc) 30 { 31 PetscFunctionBegin; 32 PetscFunctionReturn(0); 33 } 34 35 /*MC 36 PCMAT - A preconditioner obtained by multiplying by the preconditioner matrix supplied 37 in PCSetOperators() or KSPSetOperators() 38 39 Notes: This one is a little strange. One rarely has an explict matrix that approximates the 40 inverse of the matrix they wish to solve for. 41 42 Level: intermediate 43 44 .seealso: PCCreate(), PCSetType(), PCType (for list of available types), PC, 45 PCSHELL 46 47 M*/ 48 49 EXTERN_C_BEGIN 50 #undef __FUNCT__ 51 #define __FUNCT__ "PCCreate_Mat" 52 PetscErrorCode PETSCKSP_DLLEXPORT PCCreate_Mat(PC pc) 53 { 54 PetscFunctionBegin; 55 pc->ops->apply = PCApply_Mat; 56 pc->ops->applytranspose = PCApplyTranspose_Mat; 57 pc->ops->setup = 0; 58 pc->ops->destroy = PCDestroy_Mat; 59 pc->ops->setfromoptions = 0; 60 pc->ops->view = 0; 61 pc->ops->applyrichardson = 0; 62 pc->ops->applysymmetricleft = 0; 63 pc->ops->applysymmetricright = 0; 64 PetscFunctionReturn(0); 65 } 66 EXTERN_C_END 67 68