增加事件驱动和业务回滚处理方式

app/transaction.c

@@ -0,0 +1,147 @@
+/*
+ * transaction.c
+ *
+ *  Created on: 2026-03-04
+ *      Author: RT-Thread
+ *
+ *  功能: 事务管理模块实现
+ *  依赖: RT-Thread Nano, osal
+ *  跨平台适配: 基于RT-Thread Nano，使用标准API
+ */
+
+#include <rtthread.h>
+#include "osal.h"
+#include "transaction.h"
+
+/* 事务数组 */
+static transaction_t g_transactions[MAX_TRANSACTIONS];
+
+/**
+ * @brief 初始化事务管理
+ * @return 0 成功，非0 失败
+ */
+int transaction_init(void)
+{
+    /* 初始化事务数组 */
+    for (int i = 0; i < MAX_TRANSACTIONS; i++)
+    {
+        g_transactions[i].id = 0;
+        g_transactions[i].status = TRANSACTION_STATUS_IDLE;
+        g_transactions[i].rollback_func = NULL;
+        g_transactions[i].user_data = NULL;
+    }
+    
+    osal_log_i("Transaction management initialized");
+    return 0;
+}
+
+/**
+ * @brief 开始事务
+ * @param rollback_func 回滚函数
+ * @param user_data 用户数据
+ * @return 事务ID，失败返回0
+ */
+int transaction_begin(transaction_rollback_func_t rollback_func, void *user_data)
+{
+    /* 查找空闲事务 */
+    int id = 0;
+    for (int i = 0; i < MAX_TRANSACTIONS; i++)
+    {
+        if (g_transactions[i].status == TRANSACTION_STATUS_IDLE)
+        {
+            id = i + 1; /* 事务ID从1开始 */
+            break;
+        }
+    }
+    
+    if (id == 0)
+    {
+        osal_log_e("No free transaction available");
+        return 0;
+    }
+    
+    /* 初始化事务 */
+    g_transactions[id - 1].id = id;
+    g_transactions[id - 1].status = TRANSACTION_STATUS_ACTIVE;
+    g_transactions[id - 1].rollback_func = rollback_func;
+    g_transactions[id - 1].user_data = user_data;
+    
+    osal_log_i("Transaction %d started", id);
+    return id;
+}
+
+/**
+ * @brief 提交事务
+ * @param id 事务ID
+ * @return 0 成功，非0 失败
+ */
+int transaction_commit(int id)
+{
+    if (id < 1 || id > MAX_TRANSACTIONS)
+    {
+        return -1;
+    }
+    
+    transaction_t *tx = &g_transactions[id - 1];
+    if (tx->status != TRANSACTION_STATUS_ACTIVE)
+    {
+        return -1;
+    }
+    
+    /* 提交事务 */
+    tx->status = TRANSACTION_STATUS_IDLE;
+    tx->rollback_func = NULL;
+    tx->user_data = NULL;
+    
+    osal_log_i("Transaction %d committed", id);
+    return 0;
+}
+
+/**
+ * @brief 回滚事务
+ * @param id 事务ID
+ * @return 0 成功，非0 失败
+ */
+int transaction_rollback(int id)
+{
+    if (id < 1 || id > MAX_TRANSACTIONS)
+    {
+        return -1;
+    }
+    
+    transaction_t *tx = &g_transactions[id - 1];
+    if (tx->status != TRANSACTION_STATUS_ACTIVE)
+    {
+        return -1;
+    }
+    
+    /* 执行回滚函数 */
+    if (tx->rollback_func != NULL)
+    {
+        osal_log_i("Rolling back transaction %d", id);
+        tx->rollback_func(tx->user_data);
+    }
+    
+    /* 重置事务状态 */
+    tx->status = TRANSACTION_STATUS_IDLE;
+    tx->rollback_func = NULL;
+    tx->user_data = NULL;
+    
+    osal_log_i("Transaction %d rolled back", id);
+    return 0;
+}
+
+/**
+ * @brief 获取事务状态
+ * @param id 事务ID
+ * @return 事务状态
+ */
+transaction_status_t transaction_get_status(int id)
+{
+    if (id < 1 || id > MAX_TRANSACTIONS)
+    {
+        return TRANSACTION_STATUS_INVALID;
+    }
+    
+    return g_transactions[id - 1].status;
+}