Method updateResults

src/bench/nanobench.h:2518–2557

// overflow is ok, it's checked
ANKERL_NANOBENCH_NO_SANITIZE("integer", "undefined")
void LinuxPerformanceCounters::updateResults(uint64_t numIters) {
    // clear old data
    for (auto& id_value : mIdToTarget) {
        *id_value.second.targetValue = UINT64_C(0);
    }

    if (mHasError) {
        return;
    }

    mTimeEnabledNanos = mCounters[1] - mCalibratedOverhead[1];
    mTimeRunningNanos = mCounters[2] - mCalibratedOverhead[2];

    for (uint64_t i = 0; i < mCounters[0]; ++i) {
        auto idx = static_cast<size_t>(3 + i * 2 + 0);
        auto id = mCounters[idx + 1U];

        auto it = mIdToTarget.find(id);
        if (it != mIdToTarget.end()) {

            auto& tgt = it->second;
            *tgt.targetValue = mCounters[idx];
            if (tgt.correctMeasuringOverhead) {
                if (*tgt.targetValue >= mCalibratedOverhead[idx]) {
                    *tgt.targetValue -= mCalibratedOverhead[idx];
                } else {
                    *tgt.targetValue = 0U;
                }
            }
            if (tgt.correctLoopOverhead) {
                auto correctionVal = mLoopOverhead[idx] * numIters;
                if (*tgt.targetValue >= correctionVal) {
                    *tgt.targetValue -= correctionVal;
                } else {
                    *tgt.targetValue = 0U;
                }
            }
        }
    }
}

bool LinuxPerformanceCounters::monitor(uint32_t type, uint64_t eventid, Target target) {
    *target.targetValue = (std::numeric_limits<uint64_t>::max)();