Actual source code: ex6.c
1: /*$Id: ex6.c,v 1.20 2001/08/10 03:34:29 bsmith Exp $*/
3: static char help[] = "Tests removing entries from an AOData. \n\n";
5: #include petscao.h
9: int main(int argc,char **argv)
10: {
11: int n,nglobal,bs = 2,*keys,*data,ierr,rank,size,i,start;
12: PetscReal *gd;
13: AOData aodata;
15: PetscInitialize(&argc,&argv,(char*)0,help);
16: PetscOptionsGetInt(PETSC_NULL,"-n",&n,PETSC_NULL);
18: MPI_Comm_rank(PETSC_COMM_WORLD,&rank); n = rank + 2;
19: MPI_Allreduce(&n,&nglobal,1,MPI_INT,MPI_SUM,PETSC_COMM_WORLD);
20: MPI_Comm_size(PETSC_COMM_WORLD,&size);
22: /*
23: Create a database with two sets of keys
24: */
25: AODataCreateBasic(PETSC_COMM_WORLD,&aodata);
27: /*
28: Put two segments in the first key and one in the second
29: */
30: AODataKeyAdd(aodata,"key1",PETSC_DECIDE,nglobal);
31: AODataKeyAdd(aodata,"key2",PETSC_DECIDE,nglobal);
33: /* allocate space for the keys each processor will provide */
34: PetscMalloc(n*sizeof(int),&keys);
36: /*
37: We assign the first set of keys (0 to 2) to processor 0, etc.
38: This computes the first local key on each processor
39: */
40: MPI_Scan(&n,&start,1,MPI_INT,MPI_SUM,PETSC_COMM_WORLD);
41: start -= n;
43: for (i=0; i<n; i++) {
44: keys[i] = start + i;
45: }
47: /*
48: Allocate data for the first key and first segment
49: */
50: PetscMalloc(bs*n*sizeof(int),&data);
51: for (i=0; i<n; i++) {
52: data[2*i] = -(start + i);
53: data[2*i+1] = -(start + i) - 10000;
54: }
55: AODataSegmentAdd(aodata,"key1","seg1",bs,n,keys,data,PETSC_INT);
56: PetscFree(data);
58: /*
59: Allocate data for first key and second segment
60: */
61: bs = 3;
62: PetscMalloc(bs*n*sizeof(PetscReal),&gd);
63: for (i=0; i<n; i++) {
64: gd[3*i] = -(start + i);
65: gd[3*i+1] = -(start + i) - 10000;
66: gd[3*i+2] = -(start + i) - 100000;
67: }
68: AODataSegmentAdd(aodata,"key1","seg2",bs,n,keys,gd,PETSC_REAL);
70: /*
71: Use same data for second key and first segment
72: */
73: AODataSegmentAdd(aodata,"key2","seg1",bs,n,keys,gd,PETSC_REAL);
74: PetscFree(gd);
75: PetscFree(keys);
77: /*
78: View the database
79: */
80: AODataView(aodata,PETSC_VIEWER_STDOUT_WORLD);
82: /*
83: Remove a key and a single segment from the database
84: */
85: AODataKeyRemove(aodata,"key2");
86: AODataSegmentRemove(aodata,"key1","seg1");
88: AODataView(aodata,PETSC_VIEWER_STDOUT_WORLD);
90: AODataDestroy(aodata);
92: PetscFinalize();
93: return 0;
94: }
95: