Function t8_offset_consistent

Function Documentation

int t8_offset_consistent(const int mpisize, const t8_shmem_array_t offset_shmem, const t8_gloidx_t num_trees)

Check whether a given offset array represents a valid partition.

That is:

  • the entries in the offset array are increasing,

  • if a process is empty then its first tree is not shared,

  • if a process is not empty its first tree must be bigger than the last tree of the previous non-empty process, or equal to it if it is shared.

Parameters:

  • mpisize – [in] The number of MPI ranks, also the number of entries in offset minus 1.

  • offset_shmem – [in] The partition to be considered.

  • num_trees – [in] The total number of global trees in the partition.

Returns:

nonzero if the partition is valid, 0 if not.