Actual source code: state.c
petsc-3.8.4 2018-03-24
2: /*
3: Provides utility routines for manulating any type of PETSc object.
4: */
5: #include <petsc/private/petscimpl.h>
7: /*@C
8: PetscObjectStateGet - Gets the state of any PetscObject,
9: regardless of the type.
11: Not Collective
13: Input Parameter:
14: . obj - any PETSc object, for example a Vec, Mat or KSP. This must be
15: cast with a (PetscObject), for example,
16: PetscObjectStateGet((PetscObject)mat,&state);
18: Output Parameter:
19: . state - the object state
21: Notes: object state is an integer which gets increased every time
22: the object is changed. By saving and later querying the object state
23: one can determine whether information about the object is still current.
24: Currently, state is maintained for Vec and Mat objects.
26: Level: advanced
28: seealso: PetscObjectStateIncrease(), PetscObjectStateSet()
30: Concepts: state
32: @*/
33: PetscErrorCode PetscObjectStateGet(PetscObject obj,PetscObjectState *state)
34: {
38: *state = obj->state;
39: return(0);
40: }
42: /*@C
43: PetscObjectStateSet - Sets the state of any PetscObject,
44: regardless of the type.
46: Logically Collective
48: Input Parameter:
49: + obj - any PETSc object, for example a Vec, Mat or KSP. This must be
50: cast with a (PetscObject), for example,
51: PetscObjectStateSet((PetscObject)mat,state);
52: - state - the object state
54: Notes: This function should be used with extreme caution. There is
55: essentially only one use for it: if the user calls Mat(Vec)GetRow(Array),
56: which increases the state, but does not alter the data, then this
57: routine can be used to reset the state. Such a reset must be collective.
59: Level: advanced
61: seealso: PetscObjectStateGet(),PetscObjectStateIncrease()
63: Concepts: state
65: @*/
66: PetscErrorCode PetscObjectStateSet(PetscObject obj,PetscObjectState state)
67: {
70: obj->state = state;
71: return(0);
72: }
74: PetscInt PetscObjectComposedDataMax = 10;
76: /*@C
77: PetscObjectComposedDataRegister - Get an available id for composed data
79: Not Collective
81: Output parameter:
82: . id - an identifier under which data can be stored
84: Level: developer
86: Notes: You must keep this value (for example in a global variable) in order to attach the data to an object or
87: access in an object.
89: seealso: PetscObjectComposedDataSetInt()
91: @*/
92: PetscErrorCode PetscObjectComposedDataRegister(PetscInt *id)
93: {
94: static PetscInt globalcurrentstate = 0;
97: *id = globalcurrentstate++;
98: if (globalcurrentstate > PetscObjectComposedDataMax) PetscObjectComposedDataMax += 10;
99: return(0);
100: }
102: PetscErrorCode PetscObjectComposedDataIncreaseInt(PetscObject obj)
103: {
104: PetscInt *ar = obj->intcomposeddata,*new_ar,n = obj->int_idmax,new_n,i;
105: PetscObjectState *ir = obj->intcomposedstate,*new_ir;
106: PetscErrorCode ierr;
109: new_n = PetscObjectComposedDataMax;
110: PetscCalloc1(new_n,&new_ar);
111: PetscCalloc1(new_n,&new_ir);
112: if (n) {
113: for (i=0; i<n; i++) {
114: new_ar[i] = ar[i]; new_ir[i] = ir[i];
115: }
116: PetscFree(ar);
117: PetscFree(ir);
118: }
119: obj->int_idmax = new_n;
120: obj->intcomposeddata = new_ar; obj->intcomposedstate = new_ir;
121: return(0);
122: }
124: PetscErrorCode PetscObjectComposedDataIncreaseIntstar(PetscObject obj)
125: {
126: PetscInt **ar = obj->intstarcomposeddata,**new_ar,n = obj->intstar_idmax,new_n,i;
127: PetscObjectState *ir = obj->intstarcomposedstate,*new_ir;
128: PetscErrorCode ierr;
131: new_n = PetscObjectComposedDataMax;
132: PetscCalloc1(new_n,&new_ar);
133: PetscCalloc1(new_n,&new_ir);
134: if (n) {
135: for (i=0; i<n; i++) {
136: new_ar[i] = ar[i]; new_ir[i] = ir[i];
137: }
138: PetscFree(ar);
139: PetscFree(ir);
140: }
141: obj->intstar_idmax = new_n;
142: obj->intstarcomposeddata = new_ar; obj->intstarcomposedstate = new_ir;
143: return(0);
144: }
146: PetscErrorCode PetscObjectComposedDataIncreaseReal(PetscObject obj)
147: {
148: PetscReal *ar = obj->realcomposeddata,*new_ar;
149: PetscObjectState *ir = obj->realcomposedstate,*new_ir;
150: PetscInt n = obj->real_idmax,new_n,i;
151: PetscErrorCode ierr;
154: new_n = PetscObjectComposedDataMax;
155: PetscCalloc1(new_n,&new_ar);
156: PetscCalloc1(new_n,&new_ir);
157: if (n) {
158: for (i=0; i<n; i++) {
159: new_ar[i] = ar[i]; new_ir[i] = ir[i];
160: }
161: PetscFree(ar);
162: PetscFree(ir);
163: }
164: obj->real_idmax = new_n;
165: obj->realcomposeddata = new_ar; obj->realcomposedstate = new_ir;
166: return(0);
167: }
169: PetscErrorCode PetscObjectComposedDataIncreaseRealstar(PetscObject obj)
170: {
171: PetscReal **ar = obj->realstarcomposeddata,**new_ar;
172: PetscObjectState *ir = obj->realstarcomposedstate,*new_ir;
173: PetscInt n = obj->realstar_idmax,new_n,i;
174: PetscErrorCode ierr;
177: new_n = PetscObjectComposedDataMax;
178: PetscCalloc1(new_n,&new_ar);
179: PetscCalloc1(new_n,&new_ir);
180: if (n) {
181: for (i=0; i<n; i++) {
182: new_ar[i] = ar[i]; new_ir[i] = ir[i];
183: }
184: PetscFree(ar);
185: PetscFree(ir);
186: }
187: obj->realstar_idmax = new_n;
188: obj->realstarcomposeddata = new_ar; obj->realstarcomposedstate = new_ir;
189: return(0);
190: }
192: PetscErrorCode PetscObjectComposedDataIncreaseScalar(PetscObject obj)
193: {
194: PetscScalar *ar = obj->scalarcomposeddata,*new_ar;
195: PetscObjectState *ir = obj->scalarcomposedstate,*new_ir;
196: PetscInt n = obj->scalar_idmax,new_n,i;
197: PetscErrorCode ierr;
200: new_n = PetscObjectComposedDataMax;
201: PetscCalloc1(new_n,&new_ar);
202: PetscCalloc1(new_n,&new_ir);
203: if (n) {
204: for (i=0; i<n; i++) {
205: new_ar[i] = ar[i]; new_ir[i] = ir[i];
206: }
207: PetscFree(ar);
208: PetscFree(ir);
209: }
210: obj->scalar_idmax = new_n;
211: obj->scalarcomposeddata = new_ar; obj->scalarcomposedstate = new_ir;
212: return(0);
213: }
215: PetscErrorCode PetscObjectComposedDataIncreaseScalarstar(PetscObject obj)
216: {
217: PetscScalar **ar = obj->scalarstarcomposeddata,**new_ar;
218: PetscObjectState *ir = obj->scalarstarcomposedstate,*new_ir;
219: PetscInt n = obj->scalarstar_idmax,new_n,i;
220: PetscErrorCode ierr;
223: new_n = PetscObjectComposedDataMax;
224: PetscCalloc1(new_n,&new_ar);
225: PetscCalloc1(new_n,&new_ir);
226: if (n) {
227: for (i=0; i<n; i++) {
228: new_ar[i] = ar[i]; new_ir[i] = ir[i];
229: }
230: PetscFree(ar);
231: PetscFree(ir);
232: }
233: obj->scalarstar_idmax = new_n;
234: obj->scalarstarcomposeddata = new_ar; obj->scalarstarcomposedstate = new_ir;
235: return(0);
236: }
238: /*@
239: PetscObjectGetId - get unique object ID
241: Not Collective
243: Input Arguments:
244: . obj - object
246: Output Arguments:
247: . id - integer ID
249: Level: developer
251: Notes:
252: The object ID may be different on different processes, but object IDs are never reused so local equality implies global equality.
254: .seealso: PetscObjectStateGet()
255: @*/
256: PetscErrorCode PetscObjectGetId(PetscObject obj,PetscObjectId *id)
257: {
260: *id = obj->id;
261: return(0);
262: }