void histogram::update(uint64_t x, uint64_t y) {
validate_snapshots();
auto indx = get_indx(x, y);
m_snapshots.rbegin()->counters[indx] += 1;
m_last_data.counters[indx] += 1;
}
/* unsafe function that will be replaced by a threadsafe companion in the future */
PRIVATE void init_alifold(int length){
#ifdef _OPENMP
/* Explicitly turn off dynamic threads */
omp_set_dynamic(0);
#endif
if (length < 1) nrerror("initialize_fold: argument must be greater 0");
free_alifold_arrays();
get_arrays((unsigned) length);
init_length = length;
indx = get_indx((unsigned)length);
update_alifold_params();
}
