1 static char help[] = "Tests PetscCommGetComm().\n";
2
3 #include <petscsys.h>
4
main(int argc,char ** argv)5 int main(int argc, char **argv)
6 {
7 MPI_Comm comms[10], comm;
8 PetscInt i;
9 PetscRandom rand;
10
11 PetscFunctionBeginUser;
12 PetscCall(PetscInitialize(&argc, &argv, NULL, help));
13 PetscCall(PetscRandomCreate(PETSC_COMM_WORLD, &rand));
14 PetscCall(PetscObjectGetComm((PetscObject)rand, &comm));
15 for (i = 0; i < 10; i++) PetscCall(PetscCommGetComm(comm, &comms[i]));
16 for (i = 0; i < 5; i++) PetscCall(PetscCommRestoreComm(comm, &comms[i]));
17 for (i = 0; i < 5; i++) PetscCall(PetscCommGetComm(comm, &comms[i]));
18 for (i = 0; i < 10; i++) PetscCall(PetscCommRestoreComm(comm, &comms[i]));
19 PetscCall(PetscRandomDestroy(&rand));
20 PetscCall(PetscFinalize());
21 return 0;
22 }
23
24 /*TEST
25
26 test:
27 requires: defined(PETSC_USE_LOG)
28 args: -info
29 filter: grep Reusing | wc -l
30
31 TEST*/
32