kbe常用宏展开示例（CLIENT_MESSAGE_DECLARE_STREAM）

最新推荐文章于 2021-03-21 13:08:06 发布

原创最新推荐文章于 2021-03-21 13:08:06 发布 · 463 阅读

0 ·

CC 4.0 BY-SA版权

kbe 专栏收录该内容

5 篇文章

订阅专栏

本文详细解析了KBE游戏引擎中宏的使用，通过具体示例展示了宏如何减少代码重复，提高开发效率。文章深入探讨了客户端消息处理及RPC调用过程，对比了不同宏实现方式的优缺点。

虽然宏能减少重复代码编写，提高效率，但是属于机器语言，与人不太以好。不直观，不好调试。以下主要例举kbe中常用到的宏展开后的样子，以方便理解，阅读。

文件（client_interface.h），客户端消息处理，RPC调用过程类：

消息：onHelloCB

类定义：

//消息处理者
class onHelloCBClientMessagehandler_stream : public Network::MessageHandler { 
public: 
    virtual void handle(Network::Channel* pChannel, KBEngine::MemoryStream& s); 
}; 


//全局变量，处理者实例
extern const onHelloCBClientMessagehandler_stream& onHelloCB;


//消息参数
class onHelloCBArgs_stream : public Network::MessageArgs { 
public: 
	onHelloCBArgs_stream():Network::MessageArgs(){} 
	~onHelloCBArgs_stream(){} 
	virtual int32 dataSize(void) { return -1; } 
	virtual MessageArgs::MESSAGE_ARGS_TYPE type(void) { 
      return MESSAGE_ARGS_TYPE_VARIABLE; 
    } 
	virtual void addToStream(MemoryStream& s) { } 
	virtual void createFromStream(MemoryStream& s) { } 
};

类实现：

//消息处理的handle过程
void onHelloCBClientMessagehandler_stream::handle(Network::Channel* pChannel, 
   KBEngine::MemoryStream& s) { 
     KBEngine::ClientApp::getSingleton().onHelloCB(pChannel, s); 
} 


//创建并添加消息处理过程	
onHelloCBClientMessagehandler_stream* ponHelloCB = 
	   static_cast<onHelloCBClientMessagehandler_stream*>(
	   messageHandlers.add("Client""::""onHelloCB", 
                           new onHelloCBArgs_stream, 
                           -1, new onHelloCBClientMessagehandler_stream)); 
//初始化全局变量的值	   
const onHelloCBClientMessagehandler_stream& onHelloCB = *ponHelloCB;

再看一个多个参数的实现（onCreatedProxies）：

//消息处理器
class onCreatedProxiesClientMessagehandler3 : public Network::MessageHandler { 
public: 
	virtual void handle(Network::Channel* pChannel, KBEngine::MemoryStream& s); 
}; 
	
//处理器实例 
extern const onCreatedProxiesClientMessagehandler3& onCreatedProxies; 
	
	
//消息参数
class onCreatedProxiesArgs3 : public Network::MessageArgs { 
public: 
	uint64 rndUUID; 
	ENTITY_ID eid; 
    std::string entityType; 

public: 
    onCreatedProxiesArgs3():Network::MessageArgs() { 
        strArgsTypes.push_back("uint64"); 
        strArgsTypes.push_back("ENTITY_ID"); 
        strArgsTypes.push_back("std::string"); 
} 

    onCreatedProxiesArgs3(uint64 init_rndUUID, 
        ENTITY_ID init_eid, 
        std::string init_entityType): Network::MessageArgs(), 
            rndUUID(init_rndUUID), 
            eid(init_eid), 
            entityType(init_entityType) { 
        strArgsTypes.push_back("uint64"); 
        strArgsTypes.push_back("ENTITY_ID"); 
        strArgsTypes.push_back("std::string"); 
} 

~onCreatedProxiesArgs3(){} 

static void staticAddToBundle(Network::Bundle& s, 
    uint64 init_rndUUID, ENTITY_ID init_eid, std::string init_entityType) { 
    s << init_rndUUID; s << init_eid; s << init_entityType; 
} 

static void staticAddToStream(MemoryStream& s, 
    uint64 init_rndUUID, ENTITY_ID init_eid, std::string init_entityType) { 
        s << init_rndUUID; s << init_eid; s << init_entityType; 
} 

virtual int32 dataSize(void) { 
    return sizeof(uint64) + sizeof(ENTITY_ID) + sizeof(std::string); 
} 


virtual void addToStream(MemoryStream& s) { 
    s << rndUUID; s << eid; s << entityType; 
}
 
virtual void createFromStream(MemoryStream& s) { 
    s >> rndUUID; s >> eid; s >> entityType; 
} 

};

处理器实现：

//handle过程
void onCreatedProxiesClientMessagehandler3::handle(
    Network::Channel* pChannel, 
    KBEngine::MemoryStream& s) { 
        uint64 rndUUID; 
        s >> rndUUID; 
        ENTITY_ID eid; 
	    s >> eid; 
	    std::string entityType; 
	    s >> entityType; 
	    KBEngine::ClientApp::getSingleton().onCreatedProxies(
            pChannel, rndUUID, eid, entityType); 
} 
	
//实例赋值
onCreatedProxiesClientMessagehandler3* ponCreatedProxies = 
	  static_cast<onCreatedProxiesClientMessagehandler3*>(
	    messageHandlers.add("Client""::""onCreatedProxies", 
		new onCreatedProxiesArgs3, -1, 
		new onCreatedProxiesClientMessagehandler3)); 
		
const onCreatedProxiesClientMessagehandler3& onCreatedProxies = *ponCreatedProxies;