PetscCommGetNewTag#

Gets a unique new tag from a PETSc communicator

Synopsis#

#include "petscsys.h"   
PetscErrorCode PetscCommGetNewTag(MPI_Comm comm, PetscMPIInt *tag)

Collective

Input Parameter#

  • comm - the MPI communicator

Output Parameter#

  • tag - the new tag

Notes#

All processors that share the communicator MUST call this routine EXACTLY the same number of times. This tag should only be used with the current objects communicator; do NOT use it with any other MPI communicator.

See Also#

PetscObjectGetNewTag(), PetscCommDuplicate()

Level#

developer

Location#

src/sys/objects/tagm.c

Index of all Sys routines
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Index of all manual pages