BOOLEAN
PerfInfoAddToFileHash(
      PPERFINFO_ENTRY_TABLE HashTable,
      PFILE_OBJECT ObjectPointer
  );

Routine Description:

    This routine add a FileObject into the specified
    hash table if it is not already there. 

Arguments:

    HashTable - pointer to a hash table to be used.

    ObjectPointer - This is used as a key to identify a mapping.

Return Value:

    TRUE - If either the FileObject was in the table or we add it.
    FALSE - If the table is full.