cocos2dx学习笔记（多线程）

多线程的实现：

PthreadTest.h

#ifndef __MTNotificationQueue_h#define __MTNotificationQueue_h#include "cocos2d.h"#include <iostream>#include"pthread\pthread.h"USING_NS_CC;using namespace std;//线程安全的消息队列class MTNotificationQueue : public CCObject {  //队列对象static MTNotificationQueue * mInstance; class CGarbo { public: ~CGarbo() { if (MTNotificationQueue::mInstance) delete MTNotificationQueue::mInstance;mInstance = NULL; } };  static CGarbo Garbo;     typedef struct      {          string name;          CCObject* object;      } NotificationArgs;       //消息队列     vector<NotificationArgs> notifications;       MTNotificationQueue(void);   public:      static MTNotificationQueue* sharedNotificationQueue();      void postNotifications(float dt);      ~MTNotificationQueue(void);      void postNotification(const char* name, CCObject* object);  };  #endif

PthreadTest.cpp

#include "PthreadTest.h"//互斥锁，全局唯一pthread_mutex_t sharedNotificationQueueLock;//管理互斥锁的生命周期class LifeManager_PThreadMutex  {      pthread_mutex_t* mutex;   public:      LifeManager_PThreadMutex(pthread_mutex_t* mut) : mutex(mut)      {  //初始化        pthread_mutex_init(mutex, NULL);      }       ~LifeManager_PThreadMutex()      {  //销毁        pthread_mutex_destroy(mutex);      }  }__LifeManager_sharedNotificationQueueLock(&sharedNotificationQueueLock);  //生命周期锁类，管理锁开关class LifeCircleMutexLocker  {      pthread_mutex_t* mutex;   public:      LifeCircleMutexLocker(pthread_mutex_t* aMutex) : mutex(aMutex)      {  //上锁        pthread_mutex_lock(mutex);      }      ~LifeCircleMutexLocker(){  //解锁        pthread_mutex_unlock(mutex);      }  };   #define LifeCircleMutexLock(mutex) LifeCircleMutexLocker __locker__(mutex) MTNotificationQueue* MTNotificationQueue::mInstance = NULL;MTNotificationQueue::MTNotificationQueue(void){}MTNotificationQueue::~MTNotificationQueue(void){}//消息队列的单例MTNotificationQueue* MTNotificationQueue::sharedNotificationQueue(){if (!mInstance) {mInstance = new MTNotificationQueue();}return mInstance;}//消息队列的处理void MTNotificationQueue::postNotifications(float dt)  {      LifeCircleMutexLock(&sharedNotificationQueueLock);   for(uint16_t i = 0; i < notifications.size(); i++) {          NotificationArgs &arg = notifications[i];  //    void postNotification(const char *name);//       发送一个消息         CCNotificationCenter::sharedNotificationCenter()->             postNotification(arg.name.c_str(), arg.object);      }      notifications.clear();  }  //单个消息加入void MTNotificationQueue::postNotification(const char* name, CCObject* object)  {      LifeCircleMutexLock(&sharedNotificationQueueLock);       NotificationArgs arg;      arg.name = name;       if(object != NULL)  arg.object = object;   //object->copy();    else          arg.object = NULL;       notifications.push_back(arg);  }  

BackgroundLayer.cpp

#include "BackgroundLayer.h"#include "User.h"#include"PthreadTest.h"USING_NS_CC;CCScene* BackgroundLayer::scene(){    // 'scene' is an autorelease object    CCScene *scene = CCScene::create();        // 'layer' is an autorelease object    BackgroundLayer *layer = BackgroundLayer::create();    // add layer as a child to scene    scene->addChild(layer);    // return the scene    return scene;}// on "init" you need to initialize your instanceCCImage *bgImage;void* loadImages(void* arg)  {      bgImage = new CCImage();      bgImage->initWithImageFileThreadSafe("HelloWorld.png");   // 发送一个已经完成加载的消息    MTNotificationQueue::sharedNotificationQueue()->         postNotification("loadImageFinish", NULL);       return NULL;  } void BackgroundLayer::loadImageFinish(CCObject* sender)  {      CCSize winSize = CCDirector::sharedDirector()->getWinSize();  //加载图片    CCTexture2D* texture = CCTextureCache::sharedTextureCache()->         addUIImage(bgImage, "HelloWorld.png");  //释放bgImage内存，因为bgImage为进程间的共享数据    bgImage->release();   CCSprite* bg = CCSprite::createWithTexture(texture);      CCSize size = bg->getContentSize();      bg->setPosition(ccp(winSize.width / 2, winSize.height / 2));       float f = max(winSize.width/size.width,winSize.height/size.height);      bg->setScale(f);       this->addChild(bg);  }  bool BackgroundLayer::init()  {  //启动消息队列定时器，使postNotifications每帧都被调用 CCDirector::sharedDirector()->getScheduler()->scheduleSelector(  schedule_selector(MTNotificationQueue::postNotifications),              MTNotificationQueue::sharedNotificationQueue(),                 1.0 / 60.0,                    false);    bool bRet = false;      do {          CC_BREAK_IF(! CCLayer::init());  //注册消息 //void addObserver(CCObject *target,  //接收消息的对象  //    SEL_CallFuncO selector,         //响应消息的函数  //    const char *name,               //待接收的消息  //    CCObject *obj);                 //指定消息的发送者，目前暂时为无用参数      CCNotificationCenter::sharedNotificationCenter()->addObserver(              this,              callfuncO_selector(BackgroundLayer::loadImageFinish),              "loadImageFinish",              NULL);           pthread_t tid;  // 创建线程，loadImages为入口指针        pthread_create(&tid, NULL, &loadImages, NULL);           bRet = true;      } while (0);      return bRet;  }