exOS使用助手 > exOS Automation Help > Development > Programming > exOS Communication API reference (exos_api.h) > exos_datamodel

将数据模型连接到数据集消息路由器

调用语法

EXOS_ERROR_CODE exos_datamodel_connect(exos_datamodel_handle_t *datamodel, exos_datamodel_event_cb datamodel_event_callback)；

在当前版本中， datamodel_connect 函数是从 .typ 文件中生成的代码，其名称是指定的数据模型主数据结构的名称。

例如，假设 MyApp 数据模型使用 MyApp.typ 文件，而该文件中的主数据模型结构名为 MyApplication。在这种情况下，生成的头文件 (exos_myapplication.h) 将声明函数 exos_datamodel_connect_myapplication()，其用法如下：

#include "exos_myapplication.h"
...
static void datamodelEvent(exos_datamodel_handle_t *datamodel, const EXOS_DATAMODEL_EVENT_TYPE event_type, void *info)
{
...
}
...
exos_datamodel_connect_myapplication(&mydatamodel, datamodelEvent)；

出于未来兼容性的考虑， exos_datamodel_connect 作为一个假函数留在了这个头中，它将始终返回 EXOS_ERROR_NOT_IMPLEMENTED。

如果需要通过 exos_datamodel_process()在不同的循环中运行数据集，或者应用程序被分割成不同的部分，可以在服务器上注册多个同名的数据模型。

参数

•datamodel：数据模型句柄，以指针形式给出

•datamodel_event_callback：处理数据模型事件的回调函数

Connect a datamodel to the Dataset Message Router

Call syntax

EXOS_ERROR_CODE exos_datamodel_connect(exos_datamodel_handle_t *datamodel, exos_datamodel_event_cb datamodel_event_callback);

In the current version, the datamodel_connect function is code generated from a .typ file and will have the name of the specified main data structure of the datamodel.

For example, lets say the MyApp datamodel uses a MyApp.typ file, and in that file, the main datamodel structure is called MyApplication. In that case the generated header (exos_myapplication.h) will declare the function exos_datamodel_connect_myapplication(), which will result in the following usage:

For reasons of future compatibility, the exos_datamodel_connect has been left in this header as a dummy function that will always return EXOS_ERROR_NOT_IMPLEMENTED

More than one datamodel can be registered on the server with the same name, if you need to run your datasets in different loops via the exos_datamodel_process(), or if the application is split up in different parts.

Parameters

•datamodel: datamodel handle, given as a pointer

•datamodel_event_callback: callback function that handles datamodel events

exos_datamodel_connect()

exos_datamodel_connect()