ARRAY_CHUNK
array_size += ARRAY_CHUNK;
res = am(myself, ARRAY_CHUNK * sizeof (char *));
array_size = ARRAY_CHUNK;
array_size += ARRAY_CHUNK;
res = am(myself, ARRAY_CHUNK * sizeof (char *));
array_size = ARRAY_CHUNK;
(*list_len + ARRAY_CHUNK) *
*list_len += ARRAY_CHUNK;