typedef enum ApirBackendCommandType {

    /* device */
    APIR_COMMAND_TYPE_DEVICE_GET_DEVICE_COUNT = 0,
    APIR_COMMAND_TYPE_DEVICE_GET_COUNT        = 1,
    APIR_COMMAND_TYPE_DEVICE_GET_NAME         = 2,
    APIR_COMMAND_TYPE_DEVICE_GET_DESCRIPTION  = 3,
    APIR_COMMAND_TYPE_DEVICE_GET_TYPE         = 4,
    APIR_COMMAND_TYPE_DEVICE_GET_MEMORY       = 5,
    APIR_COMMAND_TYPE_DEVICE_SUPPORTS_OP      = 6,
    APIR_COMMAND_TYPE_DEVICE_GET_BUFFER_TYPE  = 7,
    APIR_COMMAND_TYPE_DEVICE_GET_PROPS        = 8,
    APIR_COMMAND_TYPE_DEVICE_BUFFER_FROM_PTR  = 9,

    /* buffer-type */
    APIR_COMMAND_TYPE_BUFFER_TYPE_GET_NAME       = 10,
    APIR_COMMAND_TYPE_BUFFER_TYPE_GET_ALIGNMENT  = 11,
    APIR_COMMAND_TYPE_BUFFER_TYPE_GET_MAX_SIZE   = 12,
    APIR_COMMAND_TYPE_BUFFER_TYPE_IS_HOST        = 13,
    APIR_COMMAND_TYPE_BUFFER_TYPE_ALLOC_BUFFER   = 14,
    APIR_COMMAND_TYPE_BUFFER_TYPE_GET_ALLOC_SIZE = 15,

    /* buffer */
    APIR_COMMAND_TYPE_BUFFER_GET_BASE    = 16,
    APIR_COMMAND_TYPE_BUFFER_SET_TENSOR  = 17,
    APIR_COMMAND_TYPE_BUFFER_GET_TENSOR  = 18,
    APIR_COMMAND_TYPE_BUFFER_CPY_TENSOR  = 19,
    APIR_COMMAND_TYPE_BUFFER_CLEAR       = 20,
    APIR_COMMAND_TYPE_BUFFER_FREE_BUFFER = 21,

    /* backend */
    APIR_COMMAND_TYPE_BACKEND_GRAPH_COMPUTE = 22,

    // last command_type index + 1
    APIR_BACKEND_DISPATCH_TABLE_COUNT = 23,
} ApirBackendCommandType;