添加了请求控制类

添加了注释

src/queryModel.cpp

@@ -0,0 +1,92 @@
+//
+// Created by ricardo on 2022/6/10.
+//
+#include "queryModel.h"
+
+QueryModel::~QueryModel()
+{
+    if(queries != nullptr)
+    {
+        bus_query_t *p = queries;
+
+        while (p != nullptr)
+        {
+            bus_query_t *temp = p;
+            p = p->next_node;
+            free(temp);
+        }
+
+        queries = nullptr;
+    }
+}
+
+void QueryModel::CreateQuery(int type, rail_node_t *node)
+{
+    auto *p = (bus_query_t *)malloc(sizeof (bus_query_t));
+    p->node = node;
+    p->type = type;
+    p->next_node = nullptr;
+
+    if (queries == nullptr)
+    {
+        queries = p;
+    }
+    else
+    {
+        bus_query_t *query = queries;
+        /**
+         * 标记是否存在相同的请求
+         */
+        bool flag = false;
+
+        do
+        {
+            if(query->node == p->node and query->type == p->type)
+            {
+                flag = true;
+                break;
+            }
+            query = query->next_node;
+        } while (query != nullptr);
+
+        if (flag)
+        {
+            // 存在相同的请求
+            free(p);
+        }
+        else
+        {
+            // 在不存在相同的请求时
+            bus_query_t *last_query = queries;
+
+            while (last_query->next_node != nullptr)
+            {
+                last_query = last_query->next_node;
+            }
+
+            last_query->next_node = p;
+        }
+    }
+}
+
+void QueryModel::DeleteQuery(bus_query_t *target_query)
+{
+    if (target_query == queries)
+    {
+        queries = target_query->next_node;
+    }
+    else
+    {
+        bus_query_t *query = queries;
+
+        // 找到被删除节点的上一个节点
+        while (query->next_node != target_query)
+        {
+            query = query->next_node;
+        }
+
+        query->next_node = target_query->next_node;
+    }
+
+    free(target_query);
+}