Actual source code: vecreg.c
petsc-3.14.6 2021-03-30
2: #include <petsc/private/vecimpl.h>
4: PetscFunctionList VecList = NULL;
5: PetscBool VecRegisterAllCalled = PETSC_FALSE;
7: /*@C
8: VecSetType - Builds a vector, for a particular vector implementation.
10: Collective on Vec
12: Input Parameters:
13: + vec - The vector object
14: - method - The name of the vector type
16: Options Database Key:
17: . -vec_type <type> - Sets the vector type; use -help for a list
18: of available types
20: Notes:
21: See "petsc/include/petscvec.h" for available vector types (for instance, VECSEQ, VECMPI, or VECSHARED).
23: Use VecDuplicate() or VecDuplicateVecs() to form additional vectors of the same type as an existing vector.
25: Level: intermediate
27: .seealso: VecGetType(), VecCreate()
28: @*/
29: PetscErrorCode VecSetType(Vec vec, VecType method)
30: {
31: PetscErrorCode (*r)(Vec);
32: PetscBool match;
33: PetscMPIInt size;
38: PetscObjectTypeCompare((PetscObject) vec, method, &match);
39: if (match) return(0);
41: /* Return if asked for VECSTANDARD and Vec is already VECSEQ on 1 process or VECMPI on more.
42: Otherwise, we free the Vec array in the call to destroy below and never reallocate it,
43: since the VecType will be the same and VecSetType(v,VECSEQ) will return when called from VecCreate_Standard */
44: MPI_Comm_size(PetscObjectComm((PetscObject)vec),&size);
45: PetscStrcmp(method,VECSTANDARD,&match);
46: if (match) {
48: PetscObjectTypeCompare((PetscObject) vec, size > 1 ? VECMPI : VECSEQ, &match);
49: if (match) return(0);
50: }
51: /* same reasons for VECCUDA and VECVIENNACL */
52: #if defined(PETSC_HAVE_CUDA)
53: PetscStrcmp(method,VECCUDA,&match);
54: if (match) {
55: PetscObjectTypeCompare((PetscObject) vec, size > 1 ? VECMPICUDA : VECSEQCUDA, &match);
56: if (match) return(0);
57: }
58: #endif
59: #if defined(PETSC_HAVE_VIENNACL)
60: PetscStrcmp(method,VECVIENNACL,&match);
61: if (match) {
62: PetscObjectTypeCompare((PetscObject) vec, size > 1 ? VECMPIVIENNACL : VECSEQVIENNACL, &match);
63: if (match) return(0);
64: }
65: #endif
66: #if defined(PETSC_HAVE_KOKKOS_KERNELS)
67: PetscStrcmp(method,VECKOKKOS,&match);
68: if (match) {
69: PetscObjectTypeCompare((PetscObject) vec, size > 1 ? VECMPIKOKKOS : VECSEQKOKKOS, &match);
70: if (match) return(0);
71: }
72: #endif
73: PetscFunctionListFind(VecList,method,&r);
74: if (!r) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_ARG_UNKNOWN_TYPE, "Unknown vector type: %s", method);
75: if (vec->ops->destroy) {
76: (*vec->ops->destroy)(vec);
77: vec->ops->destroy = NULL;
78: }
79: PetscMemzero(vec->ops,sizeof(struct _VecOps));
80: if (vec->map->n < 0 && vec->map->N < 0) {
81: vec->ops->create = r;
82: vec->ops->load = VecLoad_Default;
83: } else {
84: (*r)(vec);
85: }
86: return(0);
87: }
89: /*@C
90: VecGetType - Gets the vector type name (as a string) from the Vec.
92: Not Collective
94: Input Parameter:
95: . vec - The vector
97: Output Parameter:
98: . type - The vector type name
100: Level: intermediate
102: .seealso: VecSetType(), VecCreate()
103: @*/
104: PetscErrorCode VecGetType(Vec vec, VecType *type)
105: {
111: VecRegisterAll();
112: *type = ((PetscObject)vec)->type_name;
113: return(0);
114: }
117: /*--------------------------------------------------------------------------------------------------------------------*/
119: /*@C
120: VecRegister - Adds a new vector component implementation
122: Not Collective
124: Input Parameters:
125: + name - The name of a new user-defined creation routine
126: - create_func - The creation routine itself
128: Notes:
129: VecRegister() may be called multiple times to add several user-defined vectors
131: Sample usage:
132: .vb
133: VecRegister("my_vec",MyVectorCreate);
134: .ve
136: Then, your vector type can be chosen with the procedural interface via
137: .vb
138: VecCreate(MPI_Comm, Vec *);
139: VecSetType(Vec,"my_vector_name");
140: .ve
141: or at runtime via the option
142: .vb
143: -vec_type my_vector_name
144: .ve
146: Level: advanced
148: .seealso: VecRegisterAll(), VecRegisterDestroy()
149: @*/
150: PetscErrorCode VecRegister(const char sname[], PetscErrorCode (*function)(Vec))
151: {
155: VecInitializePackage();
156: PetscFunctionListAdd(&VecList,sname,function);
157: return(0);
158: }