一个windows下基于select多路分离器的Reactor模型

1.封装了windows下同步变量,包括实现condition,monitor.本来想封装线程,想着还要封装类似boost::bind或者signal/solt的,放弃了.

2.该Reactor模型不排除在同一个socket上投递多个eventhandler.一个eventhandler只针对一个socket事件处理(可读,可写.当然事件可以用掩码,本例没有采用这种做法.)

3.采用VS2005编译.工程携带了一个测试server和一个只用于发送数据的client,一个同时收发的client

 

4.代码摘录:

 

Eventhandler

class sCEventhandler{public:sCEventhandler(void);virtual ~sCEventhandler(void);virtual int Handler_Read(){return 1;}virtual int Handler_Write(){return 1;}virtual int Handler_Expet(){return 1;}virtual void Handler_Closed(){delete this;}};enum HandlerType{HANDLE_CONNECT,HANDLE_ACCEPT,HANDLE_WRITE,HANDLE_READ,HANDLE_EXPT};class sCSocketHandler : public sCEventhandler{public:sCSocketHandler(){};sCSocketHandler(sCSocket s,HandlerType e);void SetSocket(sCSocket s,HandlerType e){m_sk = s;m_e = e;}sCSocket GetSocket();HandlerType GetType();protected:sCSocket m_sk;HandlerType m_e;};

 

同步变量:

class MySyncObject{public:MySyncObject(void);virtual ~MySyncObject(void);virtual BOOL lock(DWORD time = INFINITE);virtual BOOL unlock() = 0;virtual BOOL unlock(long count,long* preCount = NULL){return TRUE;}operator HANDLE(){ return m_handle;}protected:HANDLE m_handle;};class MyMutex : public MySyncObject{public:MyMutex( LPSECURITY_ATTRIBUTES lpas = NULL,BOOL bOwner = TRUE, LPCTSTR name = NULL){m_handle = ::CreateMutex(lpas,bOwner,name);}BOOL unlock(){return ::ReleaseMutex(m_handle);}virtual ~MyMutex(){}};class MySemphore : public MySyncObject{public:MySemphore( long lInital = 1,long lMax = 1,LPSECURITY_ATTRIBUTES lpas = NULL,LPCTSTR name = NULL){m_handle = ::CreateSemaphore(lpas,lInital,lMax,name);}BOOL unlock(){return unlock(1);}BOOL unlock(long count,long* preCount = NULL){return ::ReleaseSemaphore(m_handle,count,preCount);}};class MyCondition{public:MyCondition() : m_Semhpore(0,1),m_count(0){}void wait( MyMutex& mutex,DWORD time = INFINITE);void noticeOne();void noticeAll();private:MySemphore m_Semhpore;long m_count;};class MyMonitor : public MySyncObject{public:MyMonitor():m_mutex(NULL,FALSE){}BOOL lock(DWORD time = INFINITE );BOOL unlock();void wait(DWORD time = INFINITE);void noticeOne();void noticeAll();private:MyMutex m_mutex;MyCondition m_condition;};

 

Reactor主执行函数:

void sCReactor::Run(){//没有listen或connect的阻塞在此if ( m_FdRead.fd_count == 0 && m_FdWrite.fd_count==0 && m_FdExept.fd_count==0){m_mutex.lock();m_condition.wait(m_mutex);m_mutex.unlock();}while(true){fd_set fd_read,fd_write,fd_exept;memcpy(&fd_read,&m_FdRead,sizeof(m_FdRead));memcpy(&fd_write,&m_FdWrite,sizeof(m_FdWrite));memcpy(&fd_exept,&m_FdExept,sizeof(m_FdExept));int ret = select(0,&fd_read,&fd_write,&fd_exept,NULL);if ( ret ==SOCKET_ERROR){}else if(ret > 0){m_mutex.lock();while( ret-->0){//在一个socket上能同时发生可读/可写// 注意: 一个socket上对应多个handler,可能导致不应该处理的handler调用了,而应该调用的handler没有被调用.//注意二:handler的处理函数中,如果有register或者removehandler的操作,导致iterator自增操作出现问题for (std::set<sCSocketHandler*>::iterator it = m_handlers.begin();it!=m_handlers.end();++it){sCSocketHandler* handler = *it;int result = 0;bool bProcess = false;HandlerType e = handler->GetType();if ( FD_ISSET(handler->GetSocket(),&fd_read)){if ( e == HANDLE_ACCEPT || e == HANDLE_READ){result = handler->Handler_Read();bProcess = true;FD_CLR(handler->GetSocket(),&fd_read);}}else if ( FD_ISSET(handler->GetSocket(),&fd_write)){if ( e == HANDLE_CONNECT || e == HANDLE_WRITE){result = handler->Handler_Write();bProcess = true;FD_CLR(handler->GetSocket(),&fd_write);}}else if( FD_ISSET(handler->GetSocket(),&fd_exept)){result = handler->Handler_Expet();bProcess = true;FD_CLR(handler->GetSocket(),&fd_exept);}if ( bProcess){if ( result < 0){if ( result == -2){//-2定义为socket关闭,相关的handler都要清掉sCSocket earseSocket = handler->GetSocket();for ( std::set<sCSocketHandler*>::iterator it = m_handlers.begin();it!=m_handlers.end();){sCSocketHandler* earseHandler = *it;if ( earseHandler->GetSocket() == earseSocket){RemoveHandler(earseHandler);it = m_handlers.begin();earseHandler->Handler_Closed();}else{++it;}}}else{RemoveHandler(handler);}}break;}}}m_mutex.unlock();}}}

 

测试服务端代码:

void main(int argc,char** argv){SocketGuard guard;sCReactor reactor;CServerAppector server(&reactor);server.Open(sCSocketAddress("127.0.0.1",7000),&reactor);while( true){Sleep(100000);}}

 

完整工程例子下载链接:http://download.csdn.net/source/2938873