PetscObjectsListGetGlobalNumbering#

computes a global numbering of PetscObjects living on subcommunicators of a given communicator.

Synopsis#

#include "petscsys.h"   
PetscErrorCode PetscObjectsListGetGlobalNumbering(MPI_Comm comm, PetscInt len, PetscObject *objlist, PetscInt *count, PetscInt *numbering)

Collective.

Input Parameters#

  • comm - the MPI_Comm

  • len - local length of objlist

  • objlist - a list of PETSc objects living on subcomms of comm and containing this comm rank (subcomm ordering is assumed to be deadlock-free)

Output Parameters#

  • count - global number of distinct subcommunicators on objlist (may be > len)

  • numbering - global numbers of objlist entries (allocated by user)

Note#

This is needed when PETSc is used with certain languages that do garbage collection to manage object life cycles.

Level#

developer

Location#

src/sys/objects/tagm.c

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