1 #include <petsc/private/viewerimpl.h> 2 #include <petscviewersaws.h> 3 #include <petscsys.h> 4 5 /* 6 The variable Petsc_Viewer_SAWs_keyval is used to indicate an MPI attribute that 7 is attached to a communicator, in this case the attribute is a PetscViewer. 8 */ 9 static PetscMPIInt Petsc_Viewer_SAWs_keyval = MPI_KEYVAL_INVALID; 10 11 /*@C 12 PETSC_VIEWER_SAWS_ - Creates a SAWs `PetscViewer` shared by all MPI processes in a communicator. 13 14 Collective 15 16 Input Parameter: 17 . comm - the MPI communicator to share the `PetscViewer` 18 19 Level: developer 20 21 Note: 22 Unlike almost all other PETSc routines, `PETSC_VIEWER_SAWS_()` does not return 23 an error code. The resulting `PetscViewer` is usually used in the form 24 $ XXXView(XXX object, PETSC_VIEWER_SAWS_(comm)); 25 26 .seealso: [](sec_viewers), `PetscViewer`, `PETSC_VIEWER_SAWS_WORLD`, `PETSC_VIEWER_SAWS_SELF` 27 @*/ 28 PetscViewer PETSC_VIEWER_SAWS_(MPI_Comm comm) 29 { 30 PetscErrorCode ierr; 31 PetscMPIInt flag; 32 PetscViewer viewer; 33 MPI_Comm ncomm; 34 35 PetscFunctionBegin; 36 ierr = PetscCommDuplicate(comm, &ncomm, NULL); 37 if (ierr) { 38 ierr = PetscError(PETSC_COMM_SELF, __LINE__, "PETSC_VIEWER_SAWS_", __FILE__, ierr, PETSC_ERROR_INITIAL, " "); 39 PetscFunctionReturn(NULL); 40 } 41 if (Petsc_Viewer_SAWs_keyval == MPI_KEYVAL_INVALID) { 42 ierr = (PetscErrorCode)MPI_Comm_create_keyval(MPI_COMM_NULL_COPY_FN, MPI_COMM_NULL_DELETE_FN, &Petsc_Viewer_SAWs_keyval, 0); 43 if (ierr) { 44 ierr = PetscError(ncomm, __LINE__, "PETSC_VIEWER_SAWS_", __FILE__, PETSC_ERR_MPI, PETSC_ERROR_INITIAL, " "); 45 PetscFunctionReturn(NULL); 46 } 47 } 48 ierr = (PetscErrorCode)MPI_Comm_get_attr(ncomm, Petsc_Viewer_SAWs_keyval, (void **)&viewer, &flag); 49 if (ierr) { 50 ierr = PetscError(ncomm, __LINE__, "PETSC_VIEWER_SAWS_", __FILE__, PETSC_ERR_MPI, PETSC_ERROR_INITIAL, " "); 51 PetscFunctionReturn(NULL); 52 } 53 if (!flag) { /* PetscViewer not yet created */ 54 ierr = PetscViewerSAWsOpen(comm, &viewer); 55 if (ierr) { 56 ierr = PetscError(ncomm, __LINE__, "PETSC_VIEWER_SAWS_", __FILE__, ierr, PETSC_ERROR_REPEAT, " "); 57 PetscFunctionReturn(NULL); 58 } 59 ierr = PetscObjectRegisterDestroy((PetscObject)viewer); 60 if (ierr) { 61 ierr = PetscError(ncomm, __LINE__, "PETSC_VIEWER_SAWS_", __FILE__, ierr, PETSC_ERROR_REPEAT, " "); 62 PetscFunctionReturn(NULL); 63 } 64 ierr = (PetscErrorCode)MPI_Comm_set_attr(ncomm, Petsc_Viewer_SAWs_keyval, (void *)viewer); 65 if (ierr) { 66 ierr = PetscError(ncomm, __LINE__, "PETSC_VIEWER_SAWS_", __FILE__, PETSC_ERR_MPI, PETSC_ERROR_INITIAL, " "); 67 PetscFunctionReturn(NULL); 68 } 69 } 70 ierr = PetscCommDestroy(&ncomm); 71 if (ierr) { 72 ierr = PetscError(PETSC_COMM_SELF, __LINE__, "PETSC_VIEWER_SAWS_", __FILE__, ierr, PETSC_ERROR_REPEAT, " "); 73 PetscFunctionReturn(NULL); 74 } 75 PetscFunctionReturn(viewer); 76 } 77 78 static PetscErrorCode PetscViewerDestroy_SAWs(PetscViewer viewer) 79 { 80 PetscFunctionBegin; 81 /* 82 Make sure that we mark that the stack is no longer published 83 */ 84 if (PetscObjectComm((PetscObject)viewer) == PETSC_COMM_WORLD) PetscCall(PetscStackSAWsViewOff()); 85 PetscFunctionReturn(PETSC_SUCCESS); 86 } 87 88 PETSC_EXTERN PetscErrorCode PetscViewerCreate_SAWs(PetscViewer v) 89 { 90 PetscFunctionBegin; 91 v->ops->destroy = PetscViewerDestroy_SAWs; 92 PetscFunctionReturn(PETSC_SUCCESS); 93 } 94