Method THostEntropy

util/random/entropy.cpp:40–105

    struct THostEntropy: public TBuffer {
        inline THostEntropy() {
            {
                TBufferOutput buf(*this);
                TZLibCompress out(&buf);

                Save(&out, GetPID());
                Save(&out, GetCycleCount());
                Save(&out, MicroSeconds());
                Save(&out, TThread::CurrentThreadId());
                Save(&out, NSystemInfo::CachedNumberOfCpus());
                Save(&out, NSystemInfo::TotalMemorySize());
                Save(&out, HostName());

                try {
                    Save(&out, GetExecPath());
                } catch (...) {
                    // workaround - sometimes fails on FreeBSD
                }

                Save(&out, (size_t)Data());
                Save(&out, (size_t)&buf);

                {
                    double la[3];

                    NSystemInfo::LoadAverage(la, Y_ARRAY_SIZE(la));

                    out.Write(la, sizeof(la));
                }

                {
                    auto mi = NMemInfo::GetMemInfo();

                    out.Write(&mi, sizeof(mi));
                }

                {
                    auto ru = TRusage::Get();

                    out.Write(&ru, sizeof(ru));
                }

                {
                    ui32 store[12];

                    out << TStringBuf(CpuBrand(store));
                }

                try {
                    out << NFs::CurrentWorkingDirectory();
                } catch (const TSystemError& e) {
                    // the current working directory has been unliked or unavailable for similar reasons
                }

                out.Finish();
            }

            {