Function gpu_getCacheOfSize

quest/src/gpu/gpu_config.cpp:684–707

qcomp* gpu_getCacheOfSize(qindex numElemsPerThread, qindex numThreads) {
#if COMPILE_CUDA

    // do not interfere with existing kernels using the cache
    gpu_sync();

    qindex numNewElems = numElemsPerThread * numThreads;

    // return existing cache if it's already sufficiently big
    if (numNewElems <= gpuCacheLen)
        return gpuCache;

    // otherwise, resize the cache
    gpuCacheLen = numNewElems;
    CUDA_CHECK( cudaFree(gpuCache) ); // nullptr fine to free
    CUDA_CHECK( cudaMalloc(&gpuCache, gpuCacheLen * sizeof *gpuCache) );

    return gpuCache;

#else
    error_gpuCacheModifiedButGpuNotCompiled();
    return nullptr;
#endif
}


void gpu_clearCache() {