Actual source code: matreg.c
1: #define PETSCMAT_DLL
3: /*
4: Mechanism for register PETSc matrix types
5: */
6: #include include/private/matimpl.h
7: #include petscsys.h
9: PetscTruth MatRegisterAllCalled = PETSC_FALSE;
11: /*
12: Contains the list of registered Mat routines
13: */
14: PetscFList MatList = 0;
18: /*@C
19: MatSetType - Builds matrix object for a particular matrix type
21: Collective on Mat
23: Input Parameters:
24: + mat - the matrix object
25: - matype - matrix type
27: Options Database Key:
28: . -mat_type <method> - Sets the type; use -help for a list
29: of available methods (for instance, seqaij)
31: Notes:
32: See "${PETSC_DIR}/include/petscmat.h" for available methods
34: Level: intermediate
36: .keywords: Mat, MatType, set, method
38: .seealso: PCSetType(), VecSetType(), MatCreate(), MatType, Mat
39: @*/
40: PetscErrorCode MatSetType(Mat mat, MatType matype)
41: {
42: PetscErrorCode ierr,(*r)(Mat);
43: PetscTruth sametype;
47: if (mat->rmap.n < 0 && mat->rmap.N < 0 && mat->cmap.n < 0 && mat->cmap.N < 0) SETERRQ(PETSC_ERR_ARG_WRONGSTATE,"Must call MatSetSizes() first");
48: PetscTypeCompare((PetscObject)mat,matype,&sametype);
49: if (sametype) return(0);
51: PetscFListFind(MatList,mat->comm,matype,(void(**)(void))&r);
52: if (!r) SETERRQ1(PETSC_ERR_ARG_UNKNOWN_TYPE,"Unknown Mat type given: %s",matype);
53:
54: /* free the old data structure if it existed */
55: if (mat->ops->destroy) {
56: MatPreallocated(mat);
57: (*mat->ops->destroy)(mat);
58: mat->ops->destroy = PETSC_NULL;
59: mat->preallocated = PETSC_FALSE;
60: }
62: /* create the new data structure */
63: (*r)(mat);
64: PetscPublishAll(mat);
65: return(0);
66: }
71: /*@C
72: MatRegisterDestroy - Frees the list of matrix types that were
73: registered by MatRegister()/MatRegisterDynamic().
75: Not Collective
77: Level: advanced
79: .keywords: Mat, register, destroy
81: .seealso: MatRegister(), MatRegisterAll(), MatRegisterDynamic()
82: @*/
83: PetscErrorCode MatRegisterDestroy(void)
84: {
88: PetscFListDestroy(&MatList);
89: MatRegisterAllCalled = PETSC_FALSE;
90: return(0);
91: }
95: /*@C
96: MatGetType - Gets the matrix type as a string from the matrix object.
98: Not Collective
100: Input Parameter:
101: . mat - the matrix
103: Output Parameter:
104: . name - name of matrix type
106: Level: intermediate
108: .keywords: Mat, MatType, get, method, name
110: .seealso: MatSetType()
111: @*/
112: PetscErrorCode MatGetType(Mat mat,MatType *type)
113: {
115: *type = mat->type_name;
116: return(0);
117: }
122: /*@C
123: MatRegister - See MatRegisterDynamic()
125: Level: advanced
126: @*/
127: PetscErrorCode MatRegister(const char sname[],const char path[],const char name[],PetscErrorCode (*function)(Mat))
128: {
130: char fullname[PETSC_MAX_PATH_LEN];
133: PetscFListConcat(path,name,fullname);
134: PetscFListAdd(&MatList,sname,fullname,(void (*)(void))function);
135: return(0);
136: }