1 2 static char help[] = "Tests DMGetGlobalVector() and DMRestoreGlobalVector().\n\n"; 3 4 /* 5 Use the options 6 -da_grid_x <nx> - number of grid points in x direction, if M < 0 7 -da_grid_y <ny> - number of grid points in y direction, if N < 0 8 -da_processors_x <MX> number of processors in x directio 9 -da_processors_y <MY> number of processors in x direction 10 */ 11 12 #include <petscdm.h> 13 #include <petscdmda.h> 14 15 int main(int argc,char **argv) 16 { 17 PetscInt M = 10,N = 8; 18 PetscBool flg = PETSC_FALSE; 19 DM da; 20 Vec global1,global2,global3; 21 DMBoundaryType bx = DM_BOUNDARY_NONE,by = DM_BOUNDARY_NONE; 22 DMDAStencilType stype = DMDA_STENCIL_BOX; 23 24 PetscFunctionBeginUser; 25 PetscCall(PetscInitialize(&argc,&argv,(char*)0,help)); 26 PetscCall(PetscOptionsGetBool(NULL,NULL,"-star_stencil",&flg,NULL)); 27 if (flg) stype = DMDA_STENCIL_STAR; 28 29 /* Create distributed array and get vectors */ 30 PetscCall(DMDACreate2d(PETSC_COMM_WORLD,bx,by,stype,M,N,PETSC_DECIDE,PETSC_DECIDE,1,1,NULL,NULL,&da)); 31 PetscCall(DMSetFromOptions(da)); 32 PetscCall(DMSetUp(da)); 33 PetscCall(DMGetGlobalVector(da,&global1)); 34 PetscCall(DMGetGlobalVector(da,&global2)); 35 PetscCall(DMRestoreGlobalVector(da,&global1)); 36 PetscCall(DMRestoreGlobalVector(da,&global2)); 37 PetscCall(DMGetGlobalVector(da,&global1)); 38 PetscCall(DMGetGlobalVector(da,&global3)); 39 PetscCall(DMGetGlobalVector(da,&global2)); 40 PetscCall(DMRestoreGlobalVector(da,&global1)); 41 PetscCall(DMRestoreGlobalVector(da,&global3)); 42 PetscCall(DMRestoreGlobalVector(da,&global2)); 43 PetscCall(DMGetGlobalVector(da,&global1)); 44 PetscCall(DMGetGlobalVector(da,&global3)); 45 PetscCall(DMGetGlobalVector(da,&global2)); 46 PetscCall(DMRestoreGlobalVector(da,&global1)); 47 PetscCall(DMRestoreGlobalVector(da,&global3)); 48 PetscCall(DMRestoreGlobalVector(da,&global2)); 49 PetscCall(DMDestroy(&da)); 50 PetscCall(PetscFinalize()); 51 return 0; 52 } 53 54 /*TEST 55 56 test: 57 58 TEST*/ 59