1: #include <petsc/private/viewerimpl.h>
  2: #include <petscviewersaws.h>

  4: /*@C
  5:   PetscViewerSAWsOpen - Opens an SAWs `PetscViewer`.

  7:   Collective; No Fortran Support

  9:   Input Parameter:
 10: . comm - the MPI communicator

 12:   Output Parameter:
 13: . lab - the `PetscViewer`

 15:   Options Database Keys:
 16: + -saws_port <port number> - port number where you are running SAWs client
 17: . -xxx_view saws           - publish the object xxx
 18: - -xxx_saws_block          - blocks the program at the end of a critical point (for `KSP` and `SNES` it is the end of a solve) until
 19:                     the user unblocks the problem with an external tool that access the object with SAWS

 21:   Level: advanced

 23:   Notes:
 24:   Unlike other viewers that only access the object being viewed on the call to `XXXView`(object,viewer) the SAWs viewer allows
 25:   one to view the object asynchronously as the program continues to run. One can remove SAWs access to the object with a call to
 26:   `PetscObjectSAWsViewOff()`.

 28:   Information about the SAWs is available via https://bitbucket.org/saws/saws

 30: .seealso: [](sec_viewers), `PetscViewerDestroy()`, `PetscViewerStringSPrintf()`, `PETSC_VIEWER_SAWS_()`, `PetscObjectSAWsBlock()`,
 31:           `PetscObjectSAWsViewOff()`, `PetscObjectSAWsTakeAccess()`, `PetscObjectSAWsGrantAccess()`
 32: @*/
 33: PetscErrorCode PetscViewerSAWsOpen(MPI_Comm comm, PetscViewer *lab)
 34: {
 35:   PetscFunctionBegin;
 36:   PetscCall(PetscViewerCreate(comm, lab));
 37:   PetscCall(PetscViewerSetType(*lab, PETSCVIEWERSAWS));
 38:   PetscFunctionReturn(PETSC_SUCCESS);
 39: }

 41: /*@C
 42:   PetscObjectViewSAWs - View the base portion of any object with an SAWs viewer

 44:   Collective

 46:   Input Parameters:
 47: + obj    - the `PetscObject` variable. It must be cast with a (`PetscObject`), for example, `PetscObjectSetName`((`PetscObject`)mat,name);
 48: - viewer - the SAWs viewer

 50:   Level: advanced

 52:   Note:
 53:   The object must have already been named before calling this routine since naming an
 54:   object can be collective.

 56:   Developer Notes:
 57:   Currently this is called only on MPI rank 0 of `PETSC_COMM_WORLD`

 59: .seealso: [](sec_viewers), `PetscViewer`, `PetscObject`, `PetscObjectSetName()`
 60: @*/
 61: PetscErrorCode PetscObjectViewSAWs(PetscObject obj, PetscViewer viewer)
 62: {
 63:   char        dir[1024];
 64:   PetscMPIInt rank;

 66:   PetscFunctionBegin;
 68:   if (obj->amsmem) PetscFunctionReturn(PETSC_SUCCESS);
 69:   PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD, &rank));
 70:   PetscCheck(rank == 0, PETSC_COMM_SELF, PETSC_ERR_PLIB, "Should only be being called on rank zero");
 71:   PetscCheck(obj->name, PETSC_COMM_SELF, PETSC_ERR_PLIB, "Object must already have been named");

 73:   obj->amsmem = PETSC_TRUE;
 74:   PetscCall(PetscSNPrintf(dir, 1024, "/PETSc/Objects/%s/Class", obj->name));
 75:   PetscCallSAWs(SAWs_Register, (dir, &obj->class_name, 1, SAWs_READ, SAWs_STRING));
 76:   PetscCall(PetscSNPrintf(dir, 1024, "/PETSc/Objects/%s/Type", obj->name));
 77:   PetscCallSAWs(SAWs_Register, (dir, &obj->type_name, 1, SAWs_READ, SAWs_STRING));
 78:   PetscCall(PetscSNPrintf(dir, 1024, "/PETSc/Objects/%s/__Id", obj->name));
 79:   PetscCallSAWs(SAWs_Register, (dir, &obj->id, 1, SAWs_READ, SAWs_INT));
 80:   PetscFunctionReturn(PETSC_SUCCESS);
 81: }