Function unload_cuda_cn

src/core/impl/comp_node_api.cpp:49–57

}

void unload_cuda_cn(mgbComputeNode_t cn) {
    auto* device = reinterpret_cast<mgb::CompNode*>(cn);
    auto& cache = cn_cache();
    mgb_assert(
            cache.find(device->to_string_physical()) != cache.end() &&
            device == cache[device->to_string_physical()]);
    cache.erase(device->to_string_physical());
    delete device;
}

void* get_cuda_stream(mgbComputeNode_t device) {
    void* rst = nullptr;