Actual source code: veccreate.c
petsc-3.13.2 2020-06-02
2: #include <petsc/private/vecimpl.h>
4: /*@
5: VecCreate - Creates an empty vector object. The type can then be set with VecSetType(),
6: or VecSetFromOptions().
8: If you never call VecSetType() or VecSetFromOptions() it will generate an
9: error when you try to use the vector.
11: Collective
13: Input Parameter:
14: . comm - The communicator for the vector object
16: Output Parameter:
17: . vec - The vector object
19: Level: beginner
21: .seealso: VecSetType(), VecSetSizes(), VecCreateMPIWithArray(), VecCreateMPI(), VecDuplicate(),
22: VecDuplicateVecs(), VecCreateGhost(), VecCreateSeq(), VecPlaceArray()
23: @*/
24: PetscErrorCode VecCreate(MPI_Comm comm, Vec *vec)
25: {
26: Vec v;
31: *vec = NULL;
32: VecInitializePackage();
34: PetscHeaderCreate(v, VEC_CLASSID, "Vec", "Vector", "Vec", comm, VecDestroy, VecView);
36: PetscLayoutCreate(comm,&v->map);
37: v->array_gotten = PETSC_FALSE;
38: v->petscnative = PETSC_FALSE;
39: #if defined(PETSC_HAVE_VIENNACL) || defined(PETSC_HAVE_CUDA)
40: v->minimum_bytes_pinned_memory = 0;
41: v->pinned_memory = PETSC_FALSE;
42: #endif
44: *vec = v;
45: return(0);
46: }