DX11 time measurement

void DX11Device::InitProfiling()
{
    D3D11_QUERY_DESC desc;
    desc.Query = D3D11_QUERY_TIMESTAMP_DISJOINT;
    desc.MiscFlags = 0;
    this->device->CreateQuery(&desc, &this->profiling.disjointQuery);

    desc.Query = D3D11_QUERY_TIMESTAMP;
    this->device->CreateQuery(&desc, &this->profiling.startQuery);
    this->device->CreateQuery(&desc, &this->profiling.endQuery);

    this->profiling.inited = true;
}

void DX11Device::StartProfiling()
{
    if (this->profiling.inited == false)
    {
        MyUtils::Logger::LogError("Profiling not inited.");
        return;
    }
    this->deviceContext->Begin(this->profiling.disjointQuery);
    this->deviceContext->End(this->profiling.startQuery);
}

void DX11Device::EndProfiling()
{
    if (this->profiling.inited == false)
    {
        MyUtils::Logger::LogError("Profiling not inited.");
        return;
    }
    this->deviceContext->End(this->profiling.endQuery);
    this->deviceContext->End(this->profiling.disjointQuery);
}

float DX11Device::GetProfilingTime()
{
    if (this->profiling.inited == false)
    {
        MyUtils::Logger::LogError("Profiling not inited.");
        return 0.0f;
    }

    // Get the query data
    UINT64 startTime = 0;
    while(this->deviceContext->GetData(this->profiling.startQuery, &startTime, sizeof(startTime), 0) != S_OK);

    UINT64 endTime = 0;
    while(this->deviceContext->GetData(this->profiling.endQuery, &endTime, sizeof(endTime), 0) != S_OK);

    D3D11_QUERY_DATA_TIMESTAMP_DISJOINT disjointData;
    while(this->deviceContext->GetData(this->profiling.disjointQuery, &disjointData, sizeof(disjointData), 0) != S_OK);

    float time = 0.0f;
    if(disjointData.Disjoint == FALSE)
    {
        UINT64 delta = endTime - startTime;
        float frequency = static_cast<float>(disjointData.Frequency);
        time = (delta / frequency) * 1000.0f;
    }

    return time;
}