Actual source code: ex6.c
2: static char help[] = "Tests removing entries from an AOData. \n\n";
4: #include petscao.h
8: int main(int argc,char **argv)
9: {
10: int n,nglobal,bs = 2,*keys,*data,ierr,rank,size,i,start;
11: PetscReal *gd;
12: AOData aodata;
14: PetscInitialize(&argc,&argv,(char*)0,help);
15: PetscOptionsGetInt(PETSC_NULL,"-n",&n,PETSC_NULL);
17: MPI_Comm_rank(PETSC_COMM_WORLD,&rank); n = rank + 2;
18: MPI_Allreduce(&n,&nglobal,1,MPI_INT,MPI_SUM,PETSC_COMM_WORLD);
19: MPI_Comm_size(PETSC_COMM_WORLD,&size);
21: /*
22: Create a database with two sets of keys
23: */
24: AODataCreateBasic(PETSC_COMM_WORLD,&aodata);
26: /*
27: Put two segments in the first key and one in the second
28: */
29: AODataKeyAdd(aodata,"key1",PETSC_DECIDE,nglobal);
30: AODataKeyAdd(aodata,"key2",PETSC_DECIDE,nglobal);
32: /* allocate space for the keys each processor will provide */
33: PetscMalloc(n*sizeof(PetscInt),&keys);
35: /*
36: We assign the first set of keys (0 to 2) to processor 0, etc.
37: This computes the first local key on each processor
38: */
39: MPI_Scan(&n,&start,1,MPI_INT,MPI_SUM,PETSC_COMM_WORLD);
40: start -= n;
42: for (i=0; i<n; i++) {
43: keys[i] = start + i;
44: }
46: /*
47: Allocate data for the first key and first segment
48: */
49: PetscMalloc(bs*n*sizeof(PetscInt),&data);
50: for (i=0; i<n; i++) {
51: data[2*i] = -(start + i);
52: data[2*i+1] = -(start + i) - 10000;
53: }
54: AODataSegmentAdd(aodata,"key1","seg1",bs,n,keys,data,PETSC_INT);
55: PetscFree(data);
57: /*
58: Allocate data for first key and second segment
59: */
60: bs = 3;
61: PetscMalloc(bs*n*sizeof(PetscReal),&gd);
62: for (i=0; i<n; i++) {
63: gd[3*i] = -(start + i);
64: gd[3*i+1] = -(start + i) - 10000;
65: gd[3*i+2] = -(start + i) - 100000;
66: }
67: AODataSegmentAdd(aodata,"key1","seg2",bs,n,keys,gd,PETSC_REAL);
69: /*
70: Use same data for second key and first segment
71: */
72: AODataSegmentAdd(aodata,"key2","seg1",bs,n,keys,gd,PETSC_REAL);
73: PetscFree(gd);
74: PetscFree(keys);
76: /*
77: View the database
78: */
79: AODataView(aodata,PETSC_VIEWER_STDOUT_WORLD);
81: /*
82: Remove a key and a single segment from the database
83: */
84: AODataKeyRemove(aodata,"key2");
85: AODataSegmentRemove(aodata,"key1","seg1");
87: AODataView(aodata,PETSC_VIEWER_STDOUT_WORLD);
89: AODataDestroy(aodata);
91: PetscFinalize();
92: return 0;
93: }
94: