Method swap

include/base/memory.h:69–77

Swap two memory spaces */

    /** Swap two memory spaces */
    void swap(Memory &m) {
        std::swap(device_id, m.device_id);
        std::swap(count, m.count);
        std::swap(capacity, m.capacity);
        std::swap(stream, m.stream);
        std::swap(refer_count, m.refer_count);
        std::swap(host_ptr, m.host_ptr);
        std::swap(device_ptr, m.device_ptr);
    }

    __host__ __device__ Data &operator[](Index index) {
#ifdef __CUDA_ARCH__