Function checkAndMigrate

src/backend/opencl/Array.cpp:196–217

template<typename T>
void checkAndMigrate(Array<T> &arr) {
    int arr_id = arr.getDevId();
    int cur_id = detail::getActiveDeviceId();
    if (!isDeviceBufferAccessible(arr_id, cur_id)) {
        auto getLogger = [&] { return spdlog::get("platform"); };
        AF_TRACE("Migrating array from {} to {}.", arr_id, cur_id);
        auto migrated_data           = memAlloc<T>(arr.elements());
        void *mapped_migrated_buffer = getQueue().enqueueMapBuffer(
            *migrated_data, CL_TRUE, CL_MAP_WRITE_INVALIDATE_REGION, 0,
            sizeof(T) * arr.elements());
        setDevice(arr_id);
        Buffer &buf = *arr.get();
        getQueue().enqueueReadBuffer(buf, CL_TRUE, 0,
                                     sizeof(T) * arr.elements(),
                                     mapped_migrated_buffer);
        setDevice(cur_id);
        getQueue().enqueueUnmapMemObject(*migrated_data,
                                         mapped_migrated_buffer);
        arr.data.reset(migrated_data.release(), bufferFree);
        arr.setId(cur_id);
    }
}

template<typename T>
void Array<T>::eval() {