Actual source code: veccreate.c
2: #include vecimpl.h
6: /*@C
7: VecCreate - Creates an empty vector object. The type can then be set with VecSetType(),
8: or VecSetFromOptions().
10: If you never call VecSetType() or VecSetFromOptions() it will generate an
11: error when you try to use the vector.
13: Collective on MPI_Comm
15: Input Parameter:
16: . comm - The communicator for the vector object
18: Output Parameter:
19: . vec - The vector object
21: Level: beginner
23: .keywords: vector, create
24: .seealso: VecSetType(), VecSetSizes(), VecCreateMPIWithArray(), VecCreateMPI(), VecDuplicate(),
25: VecDuplicateVecs(), VecCreateGhost(), VecCreateSeq(), VecPlaceArray()
26: @*/
27: PetscErrorCode VecCreate(MPI_Comm comm, Vec *vec)
28: {
29: Vec v;
34: *vec = PETSC_NULL;
35: #ifndef PETSC_USE_DYNAMIC_LIBRARIES
36: VecInitializePackage(PETSC_NULL);
37: #endif
39: PetscHeaderCreate(v, _p_Vec, struct _VecOps, VEC_COOKIE, -1, "Vec", comm, VecDestroy, VecView);
40: PetscLogObjectCreate(v);
41: PetscLogObjectMemory(v, sizeof(struct _p_Vec));
42: PetscMemzero(v->ops, sizeof(struct _VecOps));
43: v->bops->publish = PETSC_NULL /* VecPublish_Petsc */;
44: v->type_name = PETSC_NULL;
46: v->map = PETSC_NULL;
47: v->data = PETSC_NULL;
48: v->n = -1;
49: v->N = -1;
50: v->bs = -1;
51: v->mapping = PETSC_NULL;
52: v->bmapping = PETSC_NULL;
53: v->array_gotten = PETSC_FALSE;
54: v->petscnative = PETSC_FALSE;
56: *vec = v;
57: return(0);
58: }