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【Cocos2d-x】C++自定义线程安全消息管理

Cocos2d-x   发布时间：2022-05-02  发布网站：大佬教程  code.js-code.com
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【Cocos2d-x】C++自定义线程安全消息管理

一、背景

由于Cocos2d-x本身的NotificationCenter是没有进行线程安全处理的，所以当我们在Cocos2d-x里面使用多线程进行消息同步的时候，会出现问题。那么为了解决这个问题，我们只需要进行线程安全锁定即可。

为了不修改源码，我模仿NotificationCenter，自定义了一个消息管理。


二、思路

首先，我们定义一个消息体的数据类型message。他里面存储有消息名称Name,消息处理函数，消息目标，消息内容。

然后，我们定义一个消息管理类。他里面有消息容器。去容纳每一个消息。管理类对外暴漏的接口只有添加消息和发送消息。具体内容需要自己实现。

最后，将消息容器每次操作加锁即可。一个可以重复利用的，多线消息处理机制就完成了。


三、代码

头文件：

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/**************************************************************
*Copyright(C)2014-11-12byreal.Xm
*BlogAddress:http://blog.csdn.net/q229827701
*Email:229827701@qq.com
**************************************************************/
#ifndef__XmessaGE__H
#define__XmessaGE__H
#include"cocos2d.h"
class Xmessage;
CC_DLLmessageMsg: public cocos2d::ref
{
:
messageMsg();
virtual ~messageMsg();
static messageMsg*geTinstance();
bool addObserver( const std::string&msgName,cocos2d::ref*target,
cocos2d::SEL_CallFuncOSELEctor,cocos2d::ref*msgContent=nullptr);
postmessage( :1.1em!important; margin:0px!important; outline:0px!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:Consolas,cocos2d::ref*msgContent);
removeObserverByName( :1.1em!important; margin:0px!important; outline:0px!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:Consolas,cocos2d::ref*target=nullptr);
removeAllObservers(cocos2d::ref*target);
protected :
Xmessage*getmessageByName( std::string&msgName) ;
private :
//messagecontainer
cocos2d::Vector<Xmessage*>_msgContainer;
};
CC_DLLXmessage: cocos2d::ref
{
:
Xmessage( :1.1em!important; margin:0px!important; outline:0px!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:Consolas,
:1.1em!important; margin:0px!important; outline:0px!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:Consolas,cocos2d::ref*msgContent);
~Xmessage();
void handermessage(cocos2d::ref*msgContent);
CC_SYNTHESIZE_READONLY(std::string,_msgName,messageName); //messagename
CC_SYNTHESIZE_READONLY(cocos2d::ref*,_target,Target); //target
CC_SYNTHESIZE_READONLY(cocos2d::SEL_CallFuncO,_SELEctor,SELEctor); //function
:1.1em!important; margin:0px!important; outline:0px!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:Consolas,_msgContent,messageConent); //functionargs
};
#endif//!_XmessaGE_H

实现文件：

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#include"XmessageManger.h"
std::mutex_ContainerMutex;
messageMsg*_Manager=nullptr;
messageMsg::messageMsg()
{
}
messageMsg::~messageMsg()
{
_msgContainer.clear();
}
messageMsg*messageMsg::geTinstance()
{
if (!_Manager)
{
_Manager= new messageMsg;
}
return _Manager;
}
messageMsg::addObserver( :1.1em!important; margin:0px!important; outline:0px!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:Consolas,cocos2d::SEL_CallFuncOSELEctor,cocos2d::ref*msgContent /*=nullptr*/ )
{
(!getmessageByName(msgName))
{
automsg= Xmessage(msgName,target,SELEctor,msgContent);
IF_NULL_RETURN_falSE(msg);
@H_223_137@msg->autorelease();
std::lock_guard<std::mutex>ul(_ContainerMuteX);
_msgContainer.pushBACk(msg);
return true ;
}
false ;
}
messageMsg::postmessage( :1.1em!important; margin:0px!important; outline:0px!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:Consolas,cocos2d::ref*msgContent)
{
automsg=getmessageByName(msgName);
(msg)
{
@H_223_137@msg->handermessage(msgContent);
;
}
;
}
Xmessage*messageMsg::getmessageByName( const
{
std::lock_guard<std::mutex>ul(_ContainerMuteX);
for (auto&msg:_msgContainer)
{
(msgName==msg->getmessagename())
{
@H_223_137@msg;
}
}
nullptr;
}
messageMsg::removeObserverByName( :1.1em!important; margin:0px!important; outline:0px!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:Consolas,cocos2d::ref*target )
{
std::lock_guard<std::mutex>ul(_ContainerMuteX);
(auto&msg:_msgContainer)
{
(msgName==msg->getmessagename()
&&(target==msg->getTarget()||!target))
{
_msgContainer.eraseObject(msg, );
;
}
}
;
}
messageMsg::removeAllObservers(cocos2d::ref*target)
{
std::lock_guard<std::mutex>ul(_ContainerMuteX);
(auto&msg:_msgContainer)
{
(target==msg->getTarget())
{
);
;
}
}
;
}
@H_288_874@
//////////////////////////////////////////////////////////////////////////
///XmessageClass
/////////////////////////////////////////////////////////////////////////
Xmessage::Xmessage( :1.1em!important; margin:0px!important; outline:0px!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:Consolas,
:1.1em!important; margin:0px!important; outline:0px!important; overflow:visible!important; padding:0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:Consolas,cocos2d::ref*msgContent)
:_msgName(msgName),_target(target),_SELEctor(SELEctor),_msgContent(msgContent)
{
}
Xmessage::~Xmessage()
{
}
Xmessage::handermessage(cocos2d::ref*msgContent)
{
(_target)
{
(msgContent){
(_target->*_SELEctor)(msgContent);
} else {
(_target->*_SELEctor)(msgContent);
}
}
}

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