事件監聽器

#ifndef __CEVENTMGR__H_
#define __CEVENTMGR__H_
#include "singleton.h"
#include "CMutex.h"
#include "CLogmanager.h"
#include <string>
#include <map>
#include <set>

class CEventListener {
public:
    virtual int OnEvent(void* pParam) = 0;
};

class CEventMgr : public CSingleton<CEventMgr>{
    SINGLE_CLASS_INITIAL(CEventMgr);
public:
    ~CEventMgr();

public:
    int AddListener(std::string strListenName, CEventListener* pListener);
    int DelListener(CEventListener* pListener);
    int DispatchEvent(std::string strListenName, void* pParam);

private:
    std::map<std::string, std::set<CEventListener*>> mmapEventListeners;
    CMutex mcMapEventListenersMutex;
};

#endif



#include "EventMgr.h"

CEventMgr::CEventMgr(){
}

CEventMgr::~CEventMgr(){
}

int CEventMgr::AddListener(std::string strListenName, CEventListener* pListener) {
    ASSERT_RET_VALUE(nullptr != pListener, 1);
    LOG_INFO("Enter CEventMgr::AddListener");
    mcMapEventListenersMutex.Lock();
    std::map<std::string, std::set<CEventListener*>>::iterator iter_map = mmapEventListeners.find(strListenName);
    if (iter_map != mmapEventListeners.end()) {
        std::pair<std::set<CEventListener*>::iterator, bool> pair_handler;
        pair_handler = iter_map->second.insert(pListener);
        if (!pair_handler.second) {
            LOG_ERR("CEventMgr::AddListener Add Listener Err");
        }
    } else {
        std::set<CEventListener*> setTmp;
        setTmp.insert(pListener);
        mmapEventListeners.insert(make_pair(strListenName, setTmp));
    }
    mcMapEventListenersMutex.UnLock();
    return 0;
}

int CEventMgr::DelListener(CEventListener* pListener) {
    ASSERT_RET_VALUE(nullptr != pListener, 1);
    LOG_INFO("Enter CEventMgr::DelListener");
    bool bFlag = false;
    mcMapEventListenersMutex.Lock();
    for (std::map<std::string, std::set<CEventListener*>>::iterator iter_map = mmapEventListeners.begin(); iter_map != mmapEventListeners.end(); ++iter_map) {
        std::set<CEventListener*>::iterator iter_set = iter_map->second.find(pListener);
        if (iter_set != iter_map->second.end()) {
            iter_map->second.erase(iter_set);
            bFlag = true;
        }
    }
    mcMapEventListenersMutex.UnLock();

    if (!bFlag) {
        LOG_ERR("Listener Not Exist:%p", pListener);
    }
    return 0;
}

int CEventMgr::DispatchEvent(std::string strListenName, void* pParam) {
    LOG_INFO("Enter CEventMgr::DispatchEvent:%s", strListenName.c_str());
    mcMapEventListenersMutex.Lock();
    for (std::map<std::string, std::set<CEventListener*>>::iterator iter_map = mmapEventListeners.begin(); iter_map != mmapEventListeners.end(); ++iter_map) {
        for (std::set<CEventListener*>::iterator iter_set = iter_map->second.begin(); iter_set != iter_map->second.end(); ++iter_set) {
            CEventListener* pListener = *iter_set;
            if (nullptr != pListener) {
                pListener->OnEvent(pParam);
            }
        }
    }
    mcMapEventListenersMutex.UnLock();

    return 0;
}