Method runWorker

Source/Falcor/Utils/Image/AsyncTextureLoader.cpp:99–167

}

void AsyncTextureLoader::runWorker()
{
    // This function is the entry point for worker threads.
    // The workers wait on the load request queue and load a texture when woken up.
    // To avoid the upload heap growing too large, we synchronize the threads and
    // issue a global GPU flush at regular intervals.

    while (true)
    {
        // Wait on condition until more work is ready.
        std::unique_lock<std::mutex> lock(mMutex);
        mCondition.wait(lock, [&]() { return mTerminate || !mLoadRequestQueue.empty() || mFlushPending; });

        // Sync thread if a flush is pending.
        if (mFlushPending)
        {
            lock.unlock();
            mFlushBarrier->wait();
            mCondition.notify_one();
            continue;
        }

        // Terminate thread unless there is more work to do.
        if (mTerminate && mLoadRequestQueue.empty() && !mFlushPending)
            break;

        // Go back waiting if queue is currently empty.
        if (mLoadRequestQueue.empty())
            continue;

        // Pop next load request from queue.
        auto request = std::move(mLoadRequestQueue.front());
        mLoadRequestQueue.pop();

        lock.unlock();

        // Load the textures (this part is running in parallel).
        ref<Texture> pTexture;
        if (request.paths.size() == 1)
        {
            pTexture = Texture::createFromFile(
                mpDevice, request.paths[0], request.generateMipLevels, request.loadAsSRGB, request.bindFlags, request.importFlags
            );
        }
        else
        {
            pTexture = Texture::createMippedFromFiles(mpDevice, request.paths, request.loadAsSRGB, request.bindFlags, request.importFlags);
        }

        request.promise.set_value(pTexture);

        if (request.callback)
        {
            request.callback(pTexture);
        }

        lock.lock();