Actual source code: veccreate.c
1: #define PETSCVEC_DLL
2: #include private/vecimpl.h
6: /*@
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: PetscMemzero(v->ops, sizeof(struct _VecOps));
42: PetscNew(PetscMap,&v->map);
43: PetscMapInitialize(comm,v->map);
44: v->mapping = PETSC_NULL;
45: v->bmapping = PETSC_NULL;
46: v->array_gotten = PETSC_FALSE;
47: v->petscnative = PETSC_FALSE;
49: *vec = v;
50: return(0);
51: }