xref: /libCEED/tests/t202-elemrestriction.c (revision d7b241e67f6e33d9b297db3da3be4f167f32bbee)
1 // Test creation, use, and destruction of a blocked element restriction
2 #include <ceed.h>
3 
4 int main(int argc, char **argv) {
5   Ceed ceed;
6   CeedVector x, y;
7   CeedInt ne = 8;
8   CeedInt blksize = 5;
9   CeedInt ind[2*ne];
10   CeedScalar a[ne+1];
11   CeedElemRestriction r;
12 
13   CeedInit(argv[1], &ceed);
14   CeedVectorCreate(ceed, ne+1, &x);
15   for (CeedInt i=0; i<ne+1; i++) a[i] = 10 + i;
16   CeedVectorSetArray(x, CEED_MEM_HOST, CEED_USE_POINTER, a);
17 
18   for (CeedInt i=0; i<ne; i++) {
19     ind[2*i+0] = i;
20     ind[2*i+1] = i+1;
21   }
22   CeedElemRestrictionCreateBlocked(ceed, ne, 2, blksize, ne+1, 1, CEED_MEM_HOST,
23                                    CEED_USE_POINTER, ind, &r);
24   CeedVectorCreate(ceed, 2*blksize*2, &y);
25   CeedVectorSetArray(y, CEED_MEM_HOST, CEED_COPY_VALUES, NULL); // Allocates array
26 
27   // NoTranspose
28   CeedElemRestrictionApply(r, CEED_NOTRANSPOSE, CEED_NOTRANSPOSE, x, y,
29                            CEED_REQUEST_IMMEDIATE);
30   CeedVectorView(y, "%12.8f", stdout);
31 
32   // Transpose
33   CeedVectorGetArray(x, CEED_MEM_HOST, (CeedScalar **)&a);
34   for (CeedInt i=0; i<ne+1; i++) a[i] = 0;
35   CeedVectorRestoreArray(x, (CeedScalar **)&a);
36   CeedElemRestrictionApply(r, CEED_TRANSPOSE, CEED_NOTRANSPOSE, y, x,
37                            CEED_REQUEST_IMMEDIATE);
38   CeedVectorView(x, "%12.8f", stdout);
39 
40   CeedVectorDestroy(&x);
41   CeedVectorDestroy(&y);
42   CeedElemRestrictionDestroy(&r);
43   CeedDestroy(&ceed);
44   return 0;
45 }
46