Method createTimerQuery

src/vulkan/vulkan-queries.cpp:76–107

    TimerQueryHandle Device::createTimerQuery(void)
    {
        if (!m_TimerQueryPool)
        {
            std::lock_guard lockGuard(m_Mutex);

            if (!m_TimerQueryPool)
            {
                // set up the timer query pool on first use
                auto poolInfo = vk::QueryPoolCreateInfo()
                    .setQueryType(vk::QueryType::eTimestamp)
                    .setQueryCount(uint32_t(m_TimerQueryAllocator.getCapacity()) * 2); // use 2 Vulkan queries per 1 TimerQuery

                const vk::Result res = m_Context.device.createQueryPool(&poolInfo, m_Context.allocationCallbacks, &m_TimerQueryPool);
                CHECK_VK_FAIL(res)
            }
        }

        int queryIndex = m_TimerQueryAllocator.allocate();

        if (queryIndex < 0)
        {
            m_Context.error("Insufficient query pool space, increase Device::numTimerQueries");
            return nullptr;
        }

        TimerQuery* query = new TimerQuery(m_TimerQueryAllocator);
        query->beginQueryIndex = queryIndex * 2;
        query->endQueryIndex = queryIndex * 2 + 1;

        return TimerQueryHandle::Create(query);
    }

    TimerQuery::~TimerQuery()
    {