Added a context variable in basic object data structure and API to get or set the context pointer. (#1111)

src/bacnet/basic/object/structured_view.c

@@ -37,6 +37,7 @@ struct object_data {
     const char *Description;
     BACNET_NODE_TYPE Node_Type;
     const char *Node_Subtype;
+    void *Context;
     BACNET_SUBORDINATE_DATA *Subordinate_List;
     BACNET_RELATIONSHIP Default_Subordinate_Relationship;
     BACNET_DEVICE_OBJECT_REFERENCE Represents;
@@ -777,6 +778,38 @@ int Structured_View_Read_Property(BACNET_READ_PROPERTY_DATA *rpdata)
     return apdu_len;
 }
 
+/**
+ * @brief Set the context used with a specific object instance
+ * @param object_instance [in] BACnet object instance number
+ * @param context [in] pointer to the context
+ */
+void *Structured_View_Context_Get(uint32_t object_instance)
+{
+    struct object_data *pObject;
+
+    pObject = Keylist_Data(Object_List, object_instance);
+    if (pObject) {
+        return pObject->Context;
+    }
+
+    return NULL;
+}
+
+/**
+ * @brief Set the context used with a specific object instance
+ * @param object_instance [in] BACnet object instance number
+ * @param context [in] pointer to the context
+ */
+void Structured_View_Context_Set(uint32_t object_instance, void *context)
+{
+    struct object_data *pObject;
+
+    pObject = Keylist_Data(Object_List, object_instance);
+    if (pObject) {
+        pObject->Context = context;
+    }
+}
+
 /**
  * Creates a Structured View object
  * @param object_instance - object-instance number of the object