1 2 /* 3 Code for manipulating distributed regular arrays in parallel. 4 */ 5 6 #include <petsc/private/dmdaimpl.h> /*I "petscdmda.h" I*/ 7 8 #undef __FUNCT__ 9 #define __FUNCT__ "VecDuplicate_MPI_DA" 10 PetscErrorCode VecDuplicate_MPI_DA(Vec g,Vec *gg) 11 { 12 PetscErrorCode ierr; 13 DM da; 14 PetscLayout map; 15 16 PetscFunctionBegin; 17 ierr = VecGetDM(g, &da);CHKERRQ(ierr); 18 ierr = DMCreateGlobalVector(da,gg);CHKERRQ(ierr); 19 ierr = VecGetLayout(g,&map);CHKERRQ(ierr); 20 ierr = VecSetLayout(*gg,map);CHKERRQ(ierr); 21 PetscFunctionReturn(0); 22 } 23 24 25 #undef __FUNCT__ 26 #define __FUNCT__ "DMCreateGlobalVector_DA" 27 PetscErrorCode DMCreateGlobalVector_DA(DM da,Vec *g) 28 { 29 PetscErrorCode ierr; 30 DM_DA *dd = (DM_DA*)da->data; 31 32 PetscFunctionBegin; 33 PetscValidHeaderSpecific(da,DM_CLASSID,1); 34 PetscValidPointer(g,2); 35 if (da->defaultSection) { 36 ierr = DMCreateGlobalVector_Section_Private(da,g);CHKERRQ(ierr); 37 /* The view and load functions break for general layouts */ 38 PetscFunctionReturn(0); 39 } else { 40 ierr = VecCreate(PetscObjectComm((PetscObject)da),g);CHKERRQ(ierr); 41 ierr = VecSetSizes(*g,dd->Nlocal,PETSC_DETERMINE);CHKERRQ(ierr); 42 ierr = VecSetBlockSize(*g,dd->w);CHKERRQ(ierr); 43 ierr = VecSetType(*g,da->vectype);CHKERRQ(ierr); 44 ierr = VecSetDM(*g, da);CHKERRQ(ierr); 45 ierr = VecSetLocalToGlobalMapping(*g,da->ltogmap);CHKERRQ(ierr); 46 } 47 ierr = VecSetOperation(*g,VECOP_VIEW,(void (*)(void))VecView_MPI_DA);CHKERRQ(ierr); 48 ierr = VecSetOperation(*g,VECOP_LOAD,(void (*)(void))VecLoad_Default_DA);CHKERRQ(ierr); 49 ierr = VecSetOperation(*g,VECOP_DUPLICATE,(void (*)(void))VecDuplicate_MPI_DA);CHKERRQ(ierr); 50 PetscFunctionReturn(0); 51 } 52 53 #undef __FUNCT__ 54 #define __FUNCT__ "DMDACreateNaturalVector" 55 /*@ 56 DMDACreateNaturalVector - Creates a parallel PETSc vector that 57 will hold vector values in the natural numbering, rather than in 58 the PETSc parallel numbering associated with the DMDA. 59 60 Collective on DMDA 61 62 Input Parameter: 63 . da - the distributed array 64 65 Output Parameter: 66 . g - the distributed global vector 67 68 Level: developer 69 70 Note: 71 The output parameter, g, is a regular PETSc vector that should be destroyed 72 with a call to VecDestroy() when usage is finished. 73 74 The number of local entries in the vector on each process is the same 75 as in a vector created with DMCreateGlobalVector(). 76 77 .keywords: distributed array, create, global, distributed, vector 78 79 .seealso: DMCreateLocalVector(), VecDuplicate(), VecDuplicateVecs(), 80 DMDACreate1d(), DMDACreate2d(), DMDACreate3d(), DMGlobalToLocalBegin(), 81 DMGlobalToLocalEnd(), DMDALocalToGlobalBegin() 82 @*/ 83 PetscErrorCode DMDACreateNaturalVector(DM da,Vec *g) 84 { 85 PetscErrorCode ierr; 86 PetscInt cnt; 87 DM_DA *dd = (DM_DA*)da->data; 88 89 PetscFunctionBegin; 90 PetscValidHeaderSpecific(da,DM_CLASSID,1); 91 PetscValidPointer(g,2); 92 if (dd->natural) { 93 ierr = PetscObjectGetReference((PetscObject)dd->natural,&cnt);CHKERRQ(ierr); 94 if (cnt == 1) { /* object is not currently used by anyone */ 95 ierr = PetscObjectReference((PetscObject)dd->natural);CHKERRQ(ierr); 96 *g = dd->natural; 97 } else { 98 ierr = VecDuplicate(dd->natural,g);CHKERRQ(ierr); 99 } 100 } else { /* create the first version of this guy */ 101 ierr = VecCreate(PetscObjectComm((PetscObject)da),g);CHKERRQ(ierr); 102 ierr = VecSetSizes(*g,dd->Nlocal,PETSC_DETERMINE);CHKERRQ(ierr); 103 ierr = VecSetBlockSize(*g, dd->w);CHKERRQ(ierr); 104 ierr = VecSetType(*g,VECMPI);CHKERRQ(ierr); 105 ierr = PetscObjectReference((PetscObject)*g);CHKERRQ(ierr); 106 107 dd->natural = *g; 108 } 109 PetscFunctionReturn(0); 110 } 111 112 113 114