Function t8_offset_first_tree_to_entry

Function Documentation

t8_gloidx_t t8_offset_first_tree_to_entry(const t8_gloidx_t first_tree, const int shared)

Given the global tree id of the first local tree of a process and the flag whether it is shared or not, compute the entry in the offset array.

This entry is the first_tree if it is not shared and -first_tree - 1 if it is shared.

Parameters:

  • first_tree – [in] The global tree id of a process’s first tree.

  • shared – [in] 0 if first_tree is not shared with a smaller rank, 1 if it is.

Returns:

The entry that represents the process in an offset array. first_tree if shared == 0

  • first_tree - 1 if shared != 0