Function get_max_threads

csrc/cpu_ops.h:62–69

}

inline int get_max_threads() {
#if defined(_OPENMP)
    return omp_get_max_threads();
#else
    unsigned hc = std::thread::hardware_concurrency();
    return hc == 0 ? 1 : int(hc);
#endif
}

inline int adjust_num_threads(int m) {
    int actual_nth = get_max_threads();