简单的可靠udp的实现（RUDP）

 

可靠的概念

 

• 在实时通信过程中，不同的需求场景对可靠的需求是不一样的，我们在这里总体归纳为三类定义：
• 尽力可靠：通信的接收方要求发送方的数据尽量完整到达，但业务本身的数据是可以允许缺失的。例如：音视频数据、幂等性状态数据。
• 无序可靠：通信的接收方要求发送方的数据必须完整到达，但可以不管到达先后顺序。例如：文件传输、白板书写、图形实时绘制数据、日志型追加数据等。
• 有序可靠：通信接收方要求发送方的数据必须按顺序完整到达。

UDP为什么要可靠

 

•  说到这里可能很多人会说：干嘛那么麻烦，直接用TCP好了！确实很多人也都是这样做的，TCP是个基于公平性的可靠通信协议，在一些苛刻的网络条件下TCP要么不能提供正常的通信质量保证，要么成本过高。为什么要在UDP之上做可靠保证，究其原因就是在保证通信的时延和质量的条件下尽量降低成本，RUDP主要解决以下相关问题：
• 端对端连通性问题：一般终端直接和终端通信都会涉及到NAT穿越，TCP在NAT穿越实现非常困难，相对来说UDP穿越NAT却简单很多，如果是端到端的可靠通信一般用RUDP方式来解决，场景有：端到端的文件传输、音视频传输、交互指令传输等等。
• 弱网环境传输问题：在一些WIFI或者3G/4G移动网下，需要做低延迟可靠通信，如果用TCP通信延迟可能会非常大，这会影响用户体验。例如：实时的操作类网游通信、语音对话、多方白板书写等，这些场景可以采用特殊的RUDP方式来解决这类问题。
• 带宽竞争问题：有时候客户端数据上传需要突破本身TCP公平性的限制来达到高速低延时和稳定，也就是说要用特殊的流控算法来压榨客户端上传带宽，例如：直播音视频推流，这类场景用RUDP来实现不仅能压榨带宽，也能更好的增加通信的稳定性，避免类似TCP的频繁断开重连。
• 传输路径优化问题：在一些对延时要求很高的场景下，会用应用层relay的方式来做传输路由优化，也就是动态智能选路，这时双方采用RUDP方式来传输，中间的延迟进行relay选路优化延时。还有一类基于传输吞吐量的场景，例如：服务与服务之间数据分发、数据备份等，这类场景一般会采用多点并联relay来提高传输的速度，也是要建立在RUDP上的（这两点在后面着重来描述）。
• l  资源优化问题：某些场景为了避免TCP的三次握手和四次挥手的过程，会采用RUDP来优化资源的占用率和响应时间，提高系统的并发能，例如：QUIC.

原文链接：https://blog.csdn.net/yuanrxdu/article/details/78454426

最近在复习udp时想到老师曾经所说的RUDP，在网上查询了一些资料尝试写了一下。本人菜鸡，如有不足还请指正。

这是makefile文件

ReliableSocket.o : ReliableSocket.cpp ReliableSocket.h Segment.h Timer.h DatagramPacket.h ReliableSocketOutputStream.h ReliableSocketProfile.h ReliableSocketListener.h ReliableSocketStateListener.h
	g++ -c ReliableSocket.cpp
Segment.o : Segment.cpp Segment.h
	g++ -c Segment.cpp
Timer.o : Timer.cpp Thread.h Timer.h
	g++ -c Timer.cpp
Thread.o : Thread.cpp Thread.h 
	g++ -c Thread.cpp -lpthread
DatagramPacket.o : DatagramPacket.cpp DatagramPacket.h
	g++ -c DatagramPacket.cpp
ReliableSocketOutputStream.o : ReliableSocketOutputStream.cpp ReliableSocketOutputStream.h ReliableSocket.h
	g++ -c ReliableSocketOutputStream.cpp
ReliableSocketProfile.o : ReliableSocketProfile.cpp ReliableSocketProfile.h
	g++ -c ReliableSocketProfile.cpp
.PHONY:clean
clean:
	rm ReliableSocket ReliableSocket.o Segment.o Timer.o DatagramPacket.o ReliableSocketOutputStream.o ReliableSocketProfile.o

ReliableSocket.h

#ifndef RELIABLESOCKET_H_
#define RELIABLESOCKET_H_

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 

#include "Segment.h"
#include "Timer.h"
#include "Thread.h"
#include "DatagramPacket.h"
#include "ReliableSocketOutputStream.h"
#include "ReliableSocketProfile.h"
#include "ReliableSocketListener.h"
#include "ReliableSocketStateListener.h"
using namespace __gnu_cxx;
class ReliableSocketOutputStream;
class ReliableSocketInputStream;
class ReliableServerSocket;
class ReliableSocketListener;
class LogTimeMM;
class Counters;
class ShutdownHook;
class ReliableClientSocket;

class ReliableSocket
{
public:
	ReliableSocket();
	ReliableSocket(ReliableSocketProfile *profile);
	ReliableSocket(struct in_addr address,int port,struct in_addr localAddr,int localPort);
	ReliableSocket(struct sockaddr_in inetAddr,struct sockaddr_in localAddr);
	ReliableSocket(int dgram_sock);
	ReliableSocket(int dgram_sock,ReliableSocketProfile *profile);
	virtual ~ReliableSocket(){}
	void bind_sock(struct sockaddr *bindport,int addrlen);
	void connect_Socket(struct sockaddr *endpoint, int timeout = 0);
	struct in_addr getInetAddress();

	struct sockaddr *_endpoint;
	friend class ReliableSocketInputStream;
	friend class Counters;
	friend class ReliableSocketThread;
	friend class NullSegmentTimerTask;
	friend class RetransmissionTimerTask;
	friend class CumulativeAckTimerTask;
	friend class KeepAliveTimerTask;
	friend class ShutdownHook;

	ushort getPort();
	ReliableSocketInputStream& getInputStream();
	ReliableSocketOutputStream& getOutputStream();
	void closeSock();
	void setSoTimeout(int timeout);
	void setSendBufferSize(int size);
	void setReceiveBufferSize(int size);
	void setKeepAlive(bool on);
	void shutdownInput();
	void shutdownOutput();

	bool getKeepAlive();
	bool isConnected();
	bool isClosed();
	bool isInputShutdown();
	bool isOutputShutdown();

	int getSendBufferSize();
	int getReceiveBufferSize();
	void reset(ReliableSocketProfile *profile=NULL);
	void write(unsigned char b[], int off, int len);
	int read(unsigned char b[],int off,int len);
	void addListener(ReliableSocketListener *listener);
	void removeListener(ReliableSocketListener *listener);
	void addStateListener(ReliableSocketStateListener *stateListener);
	void removeStateListener(ReliableSocketStateListener *stateListener);
	void init(int &sock,ReliableSocketProfile *profile);
protected:
//函数成员
	void closeSocket();
	void closeImpl();
	void sendSegment(Segment *s);
	void retransmitSegment(Segment segment);
	void handleSYNSegment(SYNSegment *segment);
	void handleEAKSegment(EAKSegment *segment);
	void handleSegment(Segment segment);
	void sendAndQueueSegment(Segment *segment);
	void checkAndSetAck(Segment s);
	void checkAndGetAck(Segment segment);
	void checkRecvQueues();
	void sendSegmentImpl(Segment *s);
	void sendAck();
	void sendExtendedAck();
	void sendSingleAck();
	void connectionOpened();
	void connectionRefused();
	void connectionClosed();
	void connectionFailure();
	void connectionReset();
	Segment receiveSegment();
	virtual Segment* receiveSegmentImpl();
	
	static int nextSequenceNumber(int seqn);
	int compareSequenceNumbers(int seqn, int aseqn);
//数据成员
	pthread_mutex_t unackedSentQueue;
	pthread_cond_t cond;

	Counters *_counters;
	list _unackedSentQueue;
	list _outSeqRecvQueue;
	list _inSeqRecvQueue;

	int _state;

private:
	ReliableClientSocket addClientSocket(struct sockaddr_in *my_addr);
	ReliableClientSocket removeClientSocket(struct sockaddr_in *my_addr);

	unsigned char *_recvbuffer;
	bool _closed;
	bool _connected;
	bool _reset;
	bool _keepAlive;
	int _sock;
	int _timeout;
	bool _shutIn;
	bool _shutOut;
	//声明不同的互斥锁
	pthread_mutex_t mutex;
	pthread_mutex_t _closeLock;
	pthread_mutex_t _recvQueueLock;
	pthread_mutex_t _resetLock;
	pthread_mutex_t  listenerLock;		//_listeners
	pthread_mutex_t stateLock;   		//_stateListeners
	pthread_mutex_t _inSeqRecvLock;		//_inReqRecvQueue

	list _listeners;
	list _stateListeners;
	ShutdownHook *_shutdownHook;
	ReliableSocketProfile *_profile;
	ReliableSocketInputStream *_in;
	ReliableSocketOutputStream *_out;

	Thread *_sockThread;
	int _sendBufferSize;
	int _recvBufferSize;
	//待写
	Timer *_nullSegmentTimer;
	Timer *_retransmissionTimer;
	Timer *_cumulativeAckTimer;
	Timer *_keepAliveTimer;

	static const int MAX_SEQUENCE_NUMBER;
	static const int CLOSED;
	static const int SYN_RCVD;
	static const int SYN_SENT;
	static const int ESTABLISHED;
	static const int CLOSE_WAIT;
};
//class Counters

class Counters
{
public:
	Counters(){}
	~Counters(){}
	int nextSequenceNumber();
	int setSequenceNumber(int n);
	int setLastInSequence(int n);
	int getLastInSequence();
	int getCumulativeAckCounter();
	int getAndResetCumulativeAckCounter();
	int getOutOfSequenceCounter();
	int getAndResetOutOfSequenceCounter();
	int getOutstandingSegsCounter();
	int getAndResetOutstandingSegsCounter();

	void incCumulativeAckCounter();
	void incOutOfSequenceCounter();
	void incOutstandingSegsCounter();
	void reset();

private:
	int _seqn;
	int _lastInSequence;
	int _cumAckCounter;
	int _outOfSeqCounter;
	int _outSegsCounter;
};

//ReliableSocketThread
class ReliableSocketThread:Thread
{
	ReliableSocketThread();
	void run();
};

class NullSegmentTimerTask:Runnable
{
	void run();
};

class RetransmissionTimerTask:Runnable
{
	void run();
};

class CumulativeAckTimerTask:Runnable
{
	void run();
};

class KeepAliveTimerTask:Runnable
{
	void run();
};

class ShutdownHook:Thread
{
public:
	ShutdownHook():name("shutdown hook"){}
	void run();
private:
	std::string name;
};

//ReliableSocketInputStream
class ReliableSocketInputStream
{
public:
	ReliableSocketInputStream(ReliableSocket *sock);
	int read();
	int read(unsigned char b[]);
	int read(unsigned char b[],int off,int len);
	int available();
	//bool markSupported(){return false;}
	void close(){_sock->shutdownInput();}	//非法使用
	int readImpl();	
private:
	ReliableSocket *_sock;
	unsigned char *_buf;
	int _pos;
	int _count;
	pthread_mutex_t mutex;
};

//ReliableServerSocket

class ReliableSocketStateListener;
class ReceiverThread;

typedef long long int64;

class ReliableServerSocket
{
public:
	ReliableServerSocket(struct in_addr *Inetaddr=NULL,int port=0,int backlog=0);
	ReliableServerSocket(int sockfd,int backlog);
	ReliableSocket accept();
	void bindSock(struct sockaddr_in *my_addr, int backlog=0);
	void closeServSock();
	bool isClosed(){return _closed;}
	void setSoTimeout(int timeout);
	//int getSoTimeout(){return _timeout;}
	ReliableClientSocket* addClientSocket(struct sockaddr_in my_addr);
	ReliableClientSocket* removeClientSocket(struct sockaddr_in my_addr);
private:
	friend class ReceiverThread;
	friend class ReliableClientSocket;
	friend class StateListener;

	ReceiverThread *thread;
	int isbind;
	int _serverSock;
	int _timeout;
	int _backlogSize;
	bool _closed;
	list *_backlog;
	//hash_map _clientSockTable;
	//vector _clientSockTable;
	ReliableSocketStateListener *_stateListener;
	static const int DEFAULT_BACKLOG_SIZE;
	//互斥锁
	pthread_mutex_t _backLock;		//_backlog.
	pthread_mutex_t _queueLock;	
	pthread_mutex_t _clientSockLock;	//clientSockTable
	pthread_cond_t cond;
};


//获取当前时间以毫秒形式返回
class LogTimeMM
{
public:
	static int64 getSystemTime()
	{
	struct timeval tv;         //获取一个时间结构  
	gettimeofday(&tv, NULL);   //获取当前时间  
	int64 t = tv.tv_sec;
	t*=1000;
	t+=tv.tv_usec/1000;
	return t;
	}
};
class ReceiverThread:public Thread
{
public:
	ReceiverThread(Runnable *iTarget):Thread (iTarget){}
	void run();
};

class ReliableClientSocket:public ReliableSocket
{
public:
	ReliableClientSocket(int sockfd,struct sockaddr_in *endpoint):ReliableSocket(sockfd)
	{
	_endpoint = (sockaddr*)endpoint;
	}
	void segmentReceived(Segment *s);
protected:
	void init(int sockfd,ReliableSocketProfile *profile);
	Segment* receiveSegmentImpl();
	void closeSocket();
private:
	list *_queue;
	pthread_mutex_t _queueLock;
	pthread_cond_t childCond;
};

class StateListener:public ReliableSocketStateListener
{
public:
	void connectionOpened(ReliableSocket *sock){}
	void connectionRefused(ReliableSocket *sock){}
	void connectionClosed(ReliableSocket *sock){}
	void connectionFailure(ReliableSocket *sock){}
	void connectionReset(ReliableSocket *sock){}
};

#endif //_RELIABLESOCKET_H_

ReliableSocket.cpp

#include "ReliableSocket.h"

using namespace std;

//const variable
const int ReliableSocket::MAX_SEQUENCE_NUMBER = 255;
const int ReliableSocket::CLOSED = 0;
const int ReliableSocket::SYN_RCVD = 1;
const int ReliableSocket::SYN_SENT = 2;
const int ReliableSocket::ESTABLISHED = 3;
const int ReliableSocket::CLOSE_WAIT = 4;


//construction function
ReliableSocket::ReliableSocket()
{
	ReliableSocket(new ReliableSocketProfile());
}

ReliableSocket::ReliableSocket(ReliableSocketProfile *profile)
{
	int sfd;
	sfd=socket(AF_INET, SOCK_DGRAM, 0);
	ReliableSocket(sfd, profile);
}

ReliableSocket::ReliableSocket(struct in_addr address, int port,struct in_addr localAddr, int localPort)
{
	struct sockaddr_in inetAddr;
	struct sockaddr_in remoteAddr;
	inetAddr.sin_port = htons(port);
	inetAddr.sin_addr.s_addr = address.s_addr;
	remoteAddr.sin_port = htons(localPort);
	remoteAddr.sin_addr.s_addr = address.s_addr;
	ReliableSocket(inetAddr, remoteAddr);
}

ReliableSocket::ReliableSocket(struct sockaddr_in inetAddr,struct sockaddr_in localAddr)
{
	struct sockaddr_in remoteAddr;
	int _sfd;
	_sfd=socket(AF_INET,SOCK_DGRAM,0);
	remoteAddr.sin_port=htons(localAddr.sin_port);
	remoteAddr.sin_addr.s_addr=localAddr.sin_addr.s_addr;
	ReliableSocket(_sfd,new ReliableSocketProfile());
	connect_Socket((struct sockaddr*)&inetAddr);
}

ReliableSocket::ReliableSocket(int dgram_sock)
{
	ReliableSocket(dgram_sock,new ReliableSocketProfile());
}

ReliableSocket::ReliableSocket(int dgram_sock,ReliableSocketProfile *profile)
{
	if(dgram_sock == -1)
		cout<<"dgram_sock"<maxSegmentSize()-Segment::RUDP_HEADER_LEN)*32;
	_recvBufferSize=(_profile->maxSegmentSize()-Segment::RUDP_HEADER_LEN)*32;
	_sockThread->start();
}

void ReliableSocket::bind_sock(struct sockaddr *bindpoint,int addrlen)
{
	bind(_sock, bindpoint,sizeof(struct sockaddr));
}

void ReliableSocket::connect_Socket(struct sockaddr *endpoint,int timeout)
{
	if (endpoint == NULL)
	{
		cout<<"connect:The address can't be null"<setSequenceNumber(rand()%MAX_SEQUENCE_NUMBER),
	_profile->maxOutstandingSegs(),
	_profile->maxSegmentSize(),
	_profile->retransmissionTimeout(),
	_profile->cumulativeAckTimeout(),
	_profile->nullSegmentTimeout(),
	_profile->maxRetrans(),
	_profile->maxCumulativeAcks(),
	_profile->maxOutOfSequence(),
	_profile->maxAutoReset());
	
	sendAndQueueSegment(syn);
	
	bool timedout = false;
	pthread_mutex_lock(&mutex);
	if (!isConnected()){
		try{
			if (timeout == 0)
				pthread_cond_wait(&cond, &mutex);
			else{
				int64 startTime = LogTimeMM::getSystemTime();
				pthread_cond_wait(&cond, &mutex);
				if (LogTimeMM::getSystemTime()-startTime >= timeout)
					timedout = true;
				}
			}
		catch(...){
			cout<<"there is a exception!"<reset();
	_retransmissionTimer->cancel();

	switch(_state){
		case SYN_SENT:
		{
		connectionRefused();
		_state = CLOSED;
		if (timedout)
		{
			cout<<"Socket Timedout Exception:Connection refused"<sin_addr;
}

ushort ReliableSocket::getPort()
{
	if(!isConnected())
		return 0;
	return ((struct sockaddr_in *)_endpoint)->sin_port;
}

ReliableSocketInputStream& ReliableSocket::getInputStream()
{
	if (isClosed())
		cout<<"Socket is closed"<nextSequenceNumber()));
			closeImpl();
			break;
		case CLOSED:
			_retransmissionTimer->destroy();
			_cumulativeAckTimer->destroy();
			_keepAliveTimer->destroy();
			_nullSegmentTimer->destroy();
			close(_sock);
			break;
	}
		_closed = true;
		_state = CLOSED;
		pthread_mutex_lock(&unackedSentQueue);
		pthread_cond_signal(&cond);
		pthread_mutex_unlock(&unackedSentQueue);
		pthread_mutex_lock(&_inSeqRecvLock);
		pthread_cond_signal(&cond);
		pthread_mutex_unlock(&_inSeqRecvLock);
}

inline bool ReliableSocket::isConnected()
{
	return _connected;
}

inline bool ReliableSocket::isClosed()
{
	return _closed;	
}

/*void ReliableSocket::setSoTimeout(int timeout)
{
	if (timeout<0)
		cout<<"Timeout<0"<0))
		cout<<"negative receive size!"<0))
		cout<<"negative send size"<schedule(_profile->nullSegmentTimeout()*6,_profile->nullSegmentTimeout()*6);
		else
			_keepAliveTimer->cancel();
	}
}

bool ReliableSocket::getKeepAlive()
{
	if(isClosed())
		cout<<"Socket is closed!"<nextSequenceNumber()));
	lc=pthread_mutex_lock(&unackedSentQueue);
	while(!_unackedSentQueue.empty())
	{
		pthread_cond_wait(&cond, &unackedSentQueue);
	}
	lc=pthread_mutex_unlock(&unackedSentQueue);	
	rc=pthread_mutex_unlock(&_resetLock);
	
	connectionReset();
	if (profile!=NULL)
		_profile=profile;
	
	_state = SYN_SENT;
	srand((unsigned)time(NULL));
	Segment *syn=new SYNSegment(_counters->setSequenceNumber(rand()%MAX_SEQUENCE_NUMBER),
	_profile->maxOutstandingSegs(),
	_profile->maxSegmentSize(),
	_profile->retransmissionTimeout(),
	_profile->cumulativeAckTimeout(),
	_profile->nullSegmentTimeout(),
	_profile->maxRetrans(),
	_profile->maxCumulativeAcks(),
	_profile->maxOutOfSequence(),
	_profile->maxAutoReset());
	
	sendAndQueueSegment(syn);
}

void ReliableSocket::write(unsigned char b[], int off, int len)
{
	if (isClosed())
		cout<<"Socket is closed!"<maxSegmentSize()-Segment::RUDP_HEADER_LEN,len-totalBytes);
	sendAndQueueSegment(new DATSegment(ReliableSocket::_counters->nextSequenceNumber(),ReliableSocket::_counters->getLastInSequence(),b,off+totalBytes,writeBytes));
		totalBytes += writeBytes;
	pthread_mutex_lock(&_resetLock);	
	}
}

int ReliableSocket::read(unsigned char b[],int off,int len)
{
	int totalBytes = 0;
	pthread_mutex_lock(&_recvQueueLock);
	while(true)
	{
		while(_inSeqRecvQueue.empty())
		{
			if (isClosed())
				cout<<"Socket is closed!"<= _timeout))
					cout<<"timeout"<::iterator it;
		for(it = _inSeqRecvQueue.begin(); it!=_inSeqRecvQueue.end();)
		{
			Segment s = (Segment)(*++it);
			if (typeid(s) == typeid(RSTSegment))
			{
				_inSeqRecvQueue.erase(it);
				break;
			}
			else if (typeid(s) == typeid(FINSegment))
				{
				if(totalBytes<=0){
					_inSeqRecvQueue.erase(it);
					return -1;
				}
				break;
			}
			else if(typeid(s) == typeid(DATSegment))
			{
				unsigned char *data = ((DATSegment*)&s)->getData();
			if(sizeof(data)+totalBytes>len)
			{
				if (totalBytes<=0)
					cout<<"insufficient buffer space"<0)
			return totalBytes;
	}
	pthread_mutex_unlock(&_recvQueueLock);
}

void ReliableSocket::addListener(ReliableSocketListener *listener)
{
	int  rc;
	if(listener == NULL)
		cout<<"listener"<::iterator iter = find(_listeners.begin(),_listeners.end(),listener);
	if (iter == _listeners.end())
		_listeners.push_back(listener);
	rc = pthread_mutex_unlock(&listenerLock);
}

void ReliableSocket::removeListener(ReliableSocketListener *listener)
{
	int rc;
	if (listener ==NULL)
		cout<<"listener"<::iterator iter = find(_listeners.begin(),_listeners.end(),listener);
	if (iter != _listeners.end())
		_listeners.erase(iter);
	rc = pthread_mutex_unlock(&listenerLock);	
}

void ReliableSocket::addStateListener(ReliableSocketStateListener *stateListener)
{
	int rc;
	if (stateListener == NULL)
		cout<<"stateListener"<::iterator iter = find(_stateListeners.begin(),_stateListeners.end(),stateListener);
	if (iter == _stateListeners.end())
		_stateListeners.push_back(stateListener);
	rc=pthread_mutex_lock(&stateLock);	
}

void ReliableSocket::removeStateListener(ReliableSocketStateListener *stateListener)
{
	int rc;
	if (stateListener == NULL)
		cout<<"stateListener"<::iterator iter = find(_stateListeners.begin(),_stateListeners.end(),stateListener);
	if (iter != _stateListeners.end())
		_stateListeners.erase(iter);
	rc=pthread_mutex_lock(&stateLock);
}

void ReliableSocket::sendSegment(Segment *s)
{
	if (typeid(*s) == typeid(DATSegment) || typeid(*s) == typeid(RSTSegment) ||
		typeid(*s) == typeid(FINSegment) || typeid(*s) == typeid(NULSegment))
		checkAndSetAck(*s);
	if (typeid(*s) == typeid(DATSegment)||typeid(*s) == typeid(RSTSegment)||typeid(*s) == typeid(FINSegment))
		_nullSegmentTimer->reset();
	sendSegmentImpl(s);
}

Segment ReliableSocket::receiveSegment()
{
	Segment *s;
	s=receiveSegmentImpl();
	if (s != NULL)
	{
		if (typeid(s) == typeid(DATSegment) || typeid(s) == typeid(RSTSegment) ||
			typeid(s) == typeid(FINSegment) || typeid(s) == typeid(NULSegment) || typeid(s) == typeid(SYNSegment))
			ReliableSocket::_counters->incCumulativeAckCounter();
		if (_keepAlive)
			_keepAliveTimer->reset();
	}
	return *s;
}

void ReliableSocket::sendAndQueueSegment(Segment *segment)
{
	int rc;
	rc = pthread_mutex_lock(&unackedSentQueue);
	while( _unackedSentQueue.size() >= 32 || _counters->getOutstandingSegsCounter() > _profile->maxOutstandingSegs()){
		pthread_cond_wait(&cond, &unackedSentQueue);
	}
	_counters->incOutstandingSegsCounter();
	_unackedSentQueue.push_back(*segment);
	rc = pthread_mutex_unlock(&unackedSentQueue);
	
	if (_closed)
		cout<<"Socket is closed"<isIdle())
			_retransmissionTimer->schedule(ReliableSocket::_profile->retransmissionTimeout(),ReliableSocket::_profile->retransmissionTimeout());
	}
	
	sendSegment(segment);
	
	if (typeid(*segment) == typeid(DATSegment))
	{
		pthread_mutex_lock(&listenerLock);
		list::iterator it = _listeners.begin();
		while(it != _listeners.end())
			{
				ReliableSocketListener *l = *(++it);
				l->packetSent();
			}
	
		pthread_mutex_unlock(&listenerLock);	
	}	
}

void ReliableSocket::retransmitSegment(Segment segment)
{
	int rc;
	if (_profile->maxRetrans() > 0)
		segment.setRetxCounter(segment.getRetxCounter()+1);
	if ( _profile->maxRetrans() != 0 && segment.getRetxCounter() > _profile->maxRetrans()){
		connectionFailure();
		return;
	}
	sendSegment(&segment);
	
	if (typeid(segment) == typeid(DATSegment))
	{
		rc = pthread_mutex_lock(&listenerLock);
		list::iterator it = _listeners.begin();
		while(it != _listeners.end())
			{
				ReliableSocketListener *l = *(++it);
				l->packetRetransmitted();
			}
	
		rc = pthread_mutex_unlock(&listenerLock);
	}
}

void ReliableSocket::connectionOpened()
{
	int rc,cc;
	if (isConnected())
	{
		_nullSegmentTimer->cancel();
		if (_keepAlive)
			_keepAliveTimer->cancel();
		rc = pthread_mutex_lock(&_resetLock);
		_reset = false;
		pthread_cond_signal(&cond);
		rc = pthread_mutex_unlock(&_resetLock);	
	}else
	{
		_in = new ReliableSocketInputStream(this);
		_out = new ReliableSocketOutputStream(this);
		_connected = true;
		_state = ESTABLISHED;
		pthread_cond_signal(&cond);		
	
	rc = pthread_mutex_lock(&stateLock);

	list::iterator it = _stateListeners.begin();
	while(it != _stateListeners.end())
		{
			ReliableSocketStateListener *l = *(++it);
			l->connectionOpened(this);
		}

	rc = pthread_mutex_unlock(&stateLock);

	}
	_nullSegmentTimer->schedule(0,_profile->nullSegmentTimeout());
	
	if (_keepAlive)
		_keepAliveTimer->schedule(_profile->nullSegmentTimeout()*6,
					 _profile->nullSegmentTimeout()*6);
}

void ReliableSocket::connectionRefused()
{
	int rc;
	rc = pthread_mutex_lock(&stateLock);
	list::iterator it = _stateListeners.begin();
	while(it != _stateListeners.end())
		{
			ReliableSocketStateListener *l = *(++it);
			l->connectionRefused(this);
		}
	rc = pthread_mutex_unlock(&stateLock);	

}

void ReliableSocket::connectionClosed()
{
	int rc;
	rc = pthread_mutex_lock(&stateLock);
	list::iterator it = _stateListeners.begin();
	while(it != _stateListeners.end())
		{
			ReliableSocketStateListener *l = *(++it);
			l->connectionClosed(this);
		}
	rc = pthread_mutex_unlock(&stateLock);	

}

void ReliableSocket::connectionFailure()
{
	int rc;
	rc = pthread_mutex_lock(&_closeLock);
	if (isClosed())
		return;
	switch(_state)
	{
		case SYN_SENT:
			pthread_cond_signal(&cond);
			break;
		case CLOSE_WAIT:
		case SYN_RCVD:
		case ESTABLISHED:
			_connected = false;
			pthread_mutex_lock(&unackedSentQueue);
			pthread_cond_broadcast(&cond);
			pthread_mutex_unlock(&unackedSentQueue);

			pthread_mutex_lock(&_recvQueueLock);
			pthread_cond_signal(&cond);
			pthread_mutex_unlock(&_recvQueueLock);	
			
			closeImpl();
			break;		
	}
	_state = CLOSED;
	_closed = true;

	pthread_mutex_lock(&stateLock);
	list::iterator it = _stateListeners.begin();
	while(it != _stateListeners.end())
		{
			ReliableSocketStateListener *l = *(++it);
			l->connectionFailure(this);
		}
	pthread_mutex_unlock(&stateLock);
	
	rc = pthread_mutex_unlock(&_closeLock);	
}

void ReliableSocket::connectionReset()
{
	int rc;
	rc = pthread_mutex_lock(&stateLock);
	list::iterator it = _stateListeners.begin();
	while(it != _stateListeners.end())
		{
			ReliableSocketStateListener *l = *(++it);
			l->connectionReset(this);
		}
	rc = pthread_mutex_unlock(&stateLock);	
}

void ReliableSocket::handleSYNSegment(SYNSegment *segment)
{
	switch(_state)
	{
		case CLOSED:
		{
			_counters->setLastInSequence(segment->seq());
			_state = SYN_RCVD;
			srand((unsigned)time(NULL));
			_profile = new ReliableSocketProfile(32, 32, segment->getMaxSegmentSize(),segment->getMaxOutstandingSegments(), segment->getMaxRetransmissions(), segment->getMaxCumulativeAcks(), segment->getMaxOutOfSequence(), segment->getMaxAutoReset(), segment->getNulSegmentTimeout(), segment->getRetransmissionTimeout(), segment->getCumulativeAckTimeout());

			Segment *syn=new SYNSegment(_counters->setSequenceNumber(rand()%MAX_SEQUENCE_NUMBER),_profile->maxOutstandingSegs(),
			_profile->maxSegmentSize(),
			_profile->retransmissionTimeout(),
			_profile->cumulativeAckTimeout(),
			_profile->nullSegmentTimeout(),
			_profile->maxRetrans(),
			_profile->maxCumulativeAcks(),
			_profile->maxOutOfSequence(),
			_profile->maxAutoReset());

			syn->setAck(segment->seq());
			sendAndQueueSegment(syn);
			break;
		}
		case SYN_SENT:
		{
			_counters->setLastInSequence(segment->seq());
			_state = ESTABLISHED;
			sendAck();
			connectionOpened();
			break;
		}
	}
}

void ReliableSocket::handleEAKSegment(EAKSegment *segment)
{
	int rc;
	list::iterator it;
	int *acks = segment->getACKs();
	
	int lastInSequence = segment->getAck();
	int lastOutSequence = acks[sizeof(acks)/sizeof(int)-1];	
	
	rc = pthread_mutex_lock(&unackedSentQueue);
	for(it = _unackedSentQueue.begin(); it != _unackedSentQueue.end(); )
	{
		Segment s=(Segment)*(++it);
		if ((compareSequenceNumbers(s.seq(),lastInSequence) <= 0))
		{
		_unackedSentQueue.erase(it);
		continue;
		}
	
		for (int i=0; i!=sizeof(acks)/sizeof(int); ++i)
		{
			if((compareSequenceNumbers(s.seq(),acks[i]) == 0))
			{
			it = _unackedSentQueue.erase(it);
			break;
			}
		}
	}

	it = _unackedSentQueue.begin();
	while(it != _unackedSentQueue.end())
	{
		Segment s = (Segment)*(++it);
		if ((compareSequenceNumbers(lastInSequence,s.seq()) < 0) && 
			(compareSequenceNumbers(lastOutSequence,s.seq()) > 0))
		{
			retransmitSegment(s);
		}
	}
	pthread_cond_broadcast(&cond);
	rc = pthread_mutex_unlock(&unackedSentQueue);
}

void ReliableSocket::handleSegment(Segment segment)
{
	int rc;
	if (typeid(segment) == typeid(RSTSegment))
	{
		rc = pthread_mutex_lock(&_resetLock);
		_reset=true;		
		rc = pthread_mutex_unlock(&_resetLock);
		connectionReset();
	}

	if (typeid(segment) == typeid(FINSegment))
	{
		switch (_state)
		{
		case SYN_SENT:
			pthread_cond_signal(&cond);
			break;
		case CLOSED:
			break;
		default:
			_state = CLOSE_WAIT;
		}
	}
	bool inSequence = false;
	
	rc = pthread_mutex_lock(&_recvQueueLock);
	if (compareSequenceNumbers(segment.seq(),_counters->getLastInSequence()) <= 0)
	{
		/*drop packet: duplicate*/
	}
	else if (compareSequenceNumbers(segment.seq(),nextSequenceNumber(_counters->getLastInSequence())) == 0)
	{
		inSequence = true;
		if ((_inSeqRecvQueue.size() == 0) || (_inSeqRecvQueue.size() + _outSeqRecvQueue.size() < 32))
		{
			_counters->setLastInSequence(segment.seq());
			if (typeid(segment) == typeid(DATSegment) || typeid(segment) == typeid(RSTSegment) || typeid(segment) == typeid(FINSegment))
			{
			_inSeqRecvQueue.push_back(segment);
			}
		
			if (typeid(segment) == typeid(DATSegment))
			{
			pthread_mutex_lock(&listenerLock);
			list::iterator it = _listeners.begin();
			while(it != _listeners.end())
			{
				ReliableSocketListener *l=*(++it);
				l->packetReceivedInOrder();
			}
			pthread_mutex_unlock(&listenerLock);
			}
			checkRecvQueues();
		}else
		{/*Drop packet: queue is full*/}
	}
	else if (_inSeqRecvQueue.size()+_outSeqRecvQueue.size() < 32)
	{
		bool added= false;
		for(list::iterator it = _outSeqRecvQueue.begin();it != _outSeqRecvQueue.end() && !added;++it)
		{
			Segment s= (Segment)*it;
			int cmp = compareSequenceNumbers(segment.seq(),s.seq());
			if (cmp = 0)
			{
				added = true;
			}
			else if(cmp<0)
			{
				_outSeqRecvQueue.insert(it,segment);
				added = true;
			}
		}
		if (!added)
			_outSeqRecvQueue.push_back(segment);
		_counters->incOutOfSequenceCounter();
	
		if (typeid(segment) == typeid(DATSegment))
		{
			pthread_mutex_lock(&listenerLock);
			list::iterator it = _listeners.begin();
			while (it != _listeners.end())
			{
			ReliableSocketListener *l = *(++it);
			l->packetReceivedOutOrder();
			}
			pthread_mutex_unlock(&listenerLock);
		}	
	}
	
	if (inSequence && (typeid(segment) == typeid(RSTSegment) || typeid(segment) == typeid(NULSegment) || typeid(segment) == typeid(FINSegment)))
	{
	sendAck();
	}

	else if ((_counters->getOutOfSequenceCounter()>0) && _profile->maxOutOfSequence() == 0 || _counters->getOutOfSequenceCounter() > _profile->maxOutOfSequence())
	{
	sendExtendedAck();
	}
	
	else if ((_counters->getCumulativeAckCounter() >0) && (_profile->maxCumulativeAcks() == 0 ||_counters->getCumulativeAckCounter() > _profile->maxCumulativeAcks()))
	{
	sendSingleAck();
	}
	
	else
	{
		if (_cumulativeAckTimer->isIdle())
			_cumulativeAckTimer->schedule(_profile->cumulativeAckTimeout());
	}
	rc = pthread_mutex_unlock(&_recvQueueLock);	
}

void ReliableSocket::sendAck()
{
	int rc;
	rc=pthread_mutex_lock(&_recvQueueLock);
	if (!_outSeqRecvQueue.empty())
	{
		sendExtendedAck();
		return;
	}
	
	sendSingleAck();
	rc=pthread_mutex_unlock(&_recvQueueLock);	
}

void ReliableSocket::sendExtendedAck()
{
	int rc;
	rc=pthread_mutex_lock(&_recvQueueLock);
	if (_outSeqRecvQueue.empty())
		return;

	_counters->getAndResetCumulativeAckCounter();
	_counters->getAndResetOutOfSequenceCounter();

	/*Compose list of out-of-sequence sequence numbers*/
	int *acks = new int[_outSeqRecvQueue.size()];
	list::iterator it;
	int i;
	for (i = 0,it = _outSeqRecvQueue.begin(); it != _outSeqRecvQueue.end(); ++i,++it)
	{
		Segment s = *it;
		acks[i] = s.seq();
	}
	
	int lastInSequence = _counters->getLastInSequence();
	sendSegment(new EAKSegment(nextSequenceNumber(lastInSequence),lastInSequence,acks));
	rc=pthread_mutex_unlock(&_recvQueueLock);
}

void ReliableSocket::sendSingleAck()
{
	if (_counters->getAndResetCumulativeAckCounter() == 0)
		return;

	int lastInSequence = _counters->getLastInSequence();
	sendSegment(new ACKSegment(nextSequenceNumber(lastInSequence),lastInSequence));
}

void ReliableSocket::checkAndSetAck(Segment s)
{
	if (_counters->getAndResetCumulativeAckCounter() == 0)
		return;

	s.setAck(_counters->getLastInSequence());
}

void ReliableSocket::checkAndGetAck(Segment segment)
{
	int rc;
	int ackn = segment.getAck();

	if (ackn < 0)
		return;
	
	_counters->getAndResetOutstandingSegsCounter();

	if (_state == SYN_RCVD)
	{
		_state = ESTABLISHED;
		connectionOpened();
	}
	
	rc = pthread_mutex_lock(&unackedSentQueue);
	list::iterator it = _unackedSentQueue.begin();
	while(it != _unackedSentQueue.end())
	{
		Segment s = (Segment)*it;
		if (compareSequenceNumbers(s.seq(),ackn) <= 0)
			_unackedSentQueue.erase(it);
	}
	
	if (_unackedSentQueue.empty())
		_retransmissionTimer->cancel();
	
	pthread_cond_broadcast(&cond);
	rc = pthread_mutex_lock(&unackedSentQueue);
}

void ReliableSocket::checkRecvQueues()
{
	int rc;
	rc = pthread_mutex_lock(&_recvQueueLock);
	list::iterator it = _outSeqRecvQueue.begin();
	while(it != _outSeqRecvQueue.end())
	{
		Segment s = (Segment)(*it);
		
		if (compareSequenceNumbers(s.seq(),nextSequenceNumber(_counters->getLastInSequence())) == 0)
		{
			_counters->setLastInSequence(s.seq());
			if (typeid(s) == typeid(DATSegment) || typeid(s) == typeid(RSTSegment) || typeid(s) == typeid(FINSegment))
				_inSeqRecvQueue.push_back(s);

			_outSeqRecvQueue.erase(it);
		}
	}

	pthread_cond_signal(&cond);

	rc = pthread_mutex_unlock(&_recvQueueLock);
}

void ReliableSocket::sendSegmentImpl(Segment *s)
{
	int snd;
	snd = sendto(_sock, s->getBytes(), s->length(), 0, _endpoint, sizeof(struct sockaddr));
}

Segment* ReliableSocket::receiveSegmentImpl()
{
	Segment s;
	int rcv;
	_recvbuffer = new unsigned char[65535];
	rcv = recv(_sock, _recvbuffer, sizeof(_recvbuffer),0);
	return s.parse(_recvbuffer, 0, sizeof(_recvbuffer));
}

void ReliableSocket::closeSocket()
{
	close(_sock);
}

void ReliableSocket::closeImpl()
{
	_nullSegmentTimer->destroy();
	_keepAliveTimer->destroy();
	_state = CLOSE_WAIT;
}

int ReliableSocket::compareSequenceNumbers(int seqn, int aseqn)
{
	if (seqn == aseqn)
		return 0;
	else if (((seqn MAX_SEQUENCE_NUMBER/2)) ||
		 ((seqn>aseqn) && ((seqn-aseqn) < MAX_SEQUENCE_NUMBER/2)))
		return 1;
	else
		return -1;
}

/*
int Counters::nextSequenceNumber(int seqn)
{
	return (seqn+1)%MAX_SEQUENCE_NUMBER;
} */

//Counters类
int Counters::nextSequenceNumber()
{
	return (_seqn = ReliableSocket::nextSequenceNumber(_seqn));
}

int Counters::setSequenceNumber(int n)
{
	_seqn = n;
	return _seqn;
}

int Counters::setLastInSequence(int n)
{
	_lastInSequence = n;
	return _lastInSequence;
}

int Counters::getLastInSequence()
{
	return _lastInSequence;		
}

int Counters::getCumulativeAckCounter()
{
	return _cumAckCounter;			
}

int Counters::getAndResetCumulativeAckCounter()
{
	int tmp = _cumAckCounter;
	_cumAckCounter = 0;
	return tmp;
}

int Counters::getOutOfSequenceCounter()
{
	return _outOfSeqCounter;		
}

int Counters::getAndResetOutOfSequenceCounter()
{
	int tmp = _outOfSeqCounter;
	_outOfSeqCounter = 0;
	return tmp;
}

int Counters::getOutstandingSegsCounter()
{
	return _outSegsCounter;			
}

int Counters::getAndResetOutstandingSegsCounter()
{
	int tmp = _outSegsCounter;
	_outSegsCounter = 0;
	return tmp;
}

void Counters::incCumulativeAckCounter()
{
	_cumAckCounter++;		
}

void Counters::incOutOfSequenceCounter()
{
	_outOfSeqCounter++;
}

void Counters::incOutstandingSegsCounter()
{
	_outSegsCounter++;
}

void Counters::reset()
{
	_outOfSeqCounter = 0;
	_outSegsCounter = 0;
	_cumAckCounter = 0;
}


void ReliableSocketThread::run()
{
	Segment *segment;
	ReliableSocket p;
	while ((segment = (p.receiveSegmentImpl())) != NULL)
	{
		if (typeid(segment) == typeid(SYNSegment))
			p.handleSYNSegment((SYNSegment*)segment);
		else if (typeid(segment) == typeid(EAKSegment))
			p.handleEAKSegment((EAKSegment*)segment);
		else if (typeid(segment) == typeid(ACKSegment))
			{}//do  nothing
		else
			p.handleSegment(*segment);

		p.checkAndGetAck(*segment);
	}
}
//class NullSegmentTimerTask  "ReliableSocket.h" LINE 244.
void NullSegmentTimerTask::run()
{
	ReliableSocket p;
	if(p._unackedSentQueue.empty())
		p.sendAndQueueSegment(new NULSegment(p._counters->nextSequenceNumber()));
}

void RetransmissionTimerTask::run()
{
	ReliableSocket p;
	list::iterator it = p._unackedSentQueue.begin();
	while(it != p._unackedSentQueue.end())
	{
		Segment s = (Segment)*(++it);
		p.retransmitSegment(s);
	}
}

void CumulativeAckTimerTask::run()
{
	ReliableSocket p;
	p.sendAck();
}

void KeepAliveTimerTask::run()
{
	ReliableSocket p;
	p.connectionFailure();
}

void ShutdownHook::run()
{
	ReliableSocket p;
	switch(p._state)
	{
		case ReliableSocket::CLOSED:
			return;
		default:
			p.sendSegment(new FINSegment(p._counters->nextSequenceNumber()));
		break;
	}
}

//ReliableSocketInputStream类

ReliableSocketInputStream::ReliableSocketInputStream(ReliableSocket *sock)
{
	if(sock==NULL)
		cout<<"sock"<getReceiveBufferSize()];
	_pos=_count=0;
	
}
int ReliableSocketInputStream::read()
{
	int rc;
	rc=pthread_mutex_lock(&mutex);
	if(ReliableSocketInputStream::readImpl()<0)
	{
	return -1;
	}
	rc=pthread_mutex_unlock(&mutex);
	return _buf[_pos++]&0xFF;

}

int ReliableSocketInputStream::read(unsigned char b[])
{
	int rc;
	return ReliableSocketInputStream::read(b,0,sizeof(b));

}
int ReliableSocketInputStream::read(unsigned char b[],int off,int len)
{
	int rc;
	rc=pthread_mutex_lock(&mutex);
	if(ReliableSocketInputStream::readImpl()<0)
		return -1;
	int readBytes;
	if(ReliableSocketInputStream::available()read(_buf,0,sizeof(_buf));
	}
	return _count;
}

//常量初始化.
const int ReliableServerSocket::DEFAULT_BACKLOG_SIZE = 50;

ReliableServerSocket::ReliableServerSocket(struct in_addr *Inetaddr,int port,int backlog){
	int sfd;
	sfd=socket(AF_INET,SOCK_DGRAM,0);
	ReliableServerSocket(sfd,backlog);
}

ReliableServerSocket::ReliableServerSocket(int sockfd,int backlog)
{
	sockfd=socket(AF_INET,SOCK_DGRAM,0);
	_serverSock = sockfd;
	_backlogSize = (backlog<=0)?DEFAULT_BACKLOG_SIZE:backlog;
	_backlog = new list(_backlogSize);
	_timeout = 0;
	_closed = false;
	thread->start();	//ReceiveThread.
}

ReliableSocket ReliableServerSocket::accept(){
	if(isClosed())
		cout<<"Socket is closed"<empty()){
		try{
			if(_timeout == 0)
				{
					pthread_cond_wait(&cond,&_backLock);
				}
			else
			{
				int64 startTime = LogTimeMM::getSystemTime();
				pthread_cond_wait(&cond,&_backLock);
				if(LogTimeMM::getSystemTime()-startTime >= _timeout)
					cout<<"timeout!"<begin());
	_backlog->pop_front();
	return sock;
}

void ReliableServerSocket::bindSock(struct sockaddr_in *my_addr, int backlog)
{
	int dgram;
	if(isClosed())
		cout<<"Socket is closed!"<sin_port = 0;			//系统随机选择一个未被使用的端口号
	my_addr->sin_addr.s_addr = INADDR_ANY;   	//返回本机链接的地址
	isbind = bind(dgram,(struct sockaddr *)my_addr,sizeof(my_addr));
}

void ReliableServerSocket::closeServSock()
{
	if(isClosed())
	{
		return;
	}
	_closed = true;
	pthread_mutex_lock(&_backLock);
	_backlog->clear();
	pthread_cond_signal(&cond);
	pthread_mutex_unlock(&_backLock);
	if(_clientSockTable.empty())
	{
		close(_serverSock);
	}
}

/*void ReliableServerSocket::setSoTimeout(int timeout)
{
	if(timeout<0)
		cout<<"timeout<0"<::iterator iter = _clientSockTable.find(my_addr);
	ReliableClientSocket *sock = (ReliableClientSocket*)(iter->second);
	
	if(sock==NULL)
	{
		sock=new ReliableClientSocket(_serverSock,(struct sockaddr_in*)&my_addr);
		sock->addStateListener(_stateListener);
		_clientSockTable.insert(make_pair(my_addr,sock));
		delete sock;
	}
	lck = pthread_mutex_unlock(&_clientSockLock);
	return sock;
*/
}

ReliableClientSocket* ReliableServerSocket::removeClientSocket(struct sockaddr_in my_addr)
{
/*	int lck;
	lck = pthread_mutex_lock(&_clientSockLock);
	hash_map::iterator iter;
	iter=_clientSockTable.find(my_addr);
	ReliableClientSocket *sock = (ReliableClientSocket*)(iter->second);
	_clientSockTable.erase(my_addr);
	if(_clientSockTable.empty())
	{
		if(isClosed()){close(_serverSock);}
	}
	lck = pthread_mutex_lock(&_clientSockLock);
	return sock;
*/
}

//ReceiverThread类
void ReceiverThread::run()
{
/*	ReliableServerSocket p;
	Segment seg;
	unsigned char *buffer=new unsigned char[65535];
	while(true)
	{
		DatagramPacket *packet = new DatagramPacket(buffer, sizeof(buffer));
		ReliableClientSocket *sock;
		try{
			int rv=recv(p._serverSock,buffer,sizeof(buffer),0);
			struct sockaddr_in endpoint = packet->getSocketAddress();
			Segment *s=seg.parse(packet->getData(),0,packet->getLength());
			if(!p.isClosed())
			{
				if(typeid(s) == typeid(SYNSegment))
				{
					if(p._clientSockTable.find(endpoint) == p._clientSockTable.end())
						sock = p.addClientSocket(endpoint);
				}
			}
			hash_map::iterator it;
			it = p._clientSockTable.find(endpoint);
			if (it != p._clientSockTable.end())
				sock = it->second;

			if (sock != NULL)
				sock->segmentReceived(s);
			}
		catch(...)
		{
			if (p.isClosed())
				break;
			cout<<"exception!"<;
	p->init(sockfd,profile);
}

Segment* ReliableClientSocket::receiveSegmentImpl()
{
	pthread_mutex_lock(&_queueLock);
	while(_queue->empty()){
		pthread_cond_wait(&childCond,&_queueLock);
	}
	Segment *s = (Segment*)*(_queue->begin());
	_queue->pop_front();
	pthread_mutex_unlock(&_queueLock);
	return s;
}

void ReliableClientSocket::segmentReceived(Segment *s)
{
	pthread_mutex_lock(&_queueLock);
	_queue->push_back(s);
	pthread_cond_signal(&childCond);
	pthread_mutex_unlock(&_queueLock);
}

void ReliableClientSocket::closeSocket()
{
	pthread_mutex_lock(&_queueLock);
	_queue->clear();
	pthread_cond_signal(&childCond);
	pthread_mutex_unlock(&_queueLock);
}


//class StateListener
/*
void StateListener::connectionOpened(ReliableSocket *sock)
{
	int lck;
	if (typeid(*sock) == typeid(ReliableClientSocket))
	{
		lck =pthread_mutex_lock(&ReliableSocket::_backLock);
		while (_backlog.size() > DEFAULT_BACKLOG_SIZE)
		{
			pthread_cond_wait(&ReliableSocket::cond, &ReliableSocket::_backLock);
		}
		_backlog.push_back(*sock);
		pthread_cond_signal(&ReliableSocket::cond);
		lck =pthread_mutex_unlock(&ReliableSocket::_backLock);
	}
}
void StateListener::connectionRefused(ReliableSocket *sock)
{}
void StateListener::connectionClosed(ReliableSocket *sock)
{}
void StateListener::connectionFailure(ReliableSocket *sock)
{}
void StateListener::connectionReset(ReliableSocket *sock)
{}
*/

DatagramPacket.h

#ifndef DATAGRAMPACKET_H
#define DATAGRAMPACKET_H

#include 
#include 
#include 
#include 
using namespace std;
class DatagramPacket
{
public:
	typedef unsigned char byte;
	DatagramPacket(byte _buf[], int _length, int _offset = 0);
	DatagramPacket(byte _buf[], int _length, struct in_addr _address, int port, int _offset = 0);

	struct in_addr getAddress()	{return *address;}
	int getPort()			{return port;}
	byte* getData()			{return buf;}
	int getOffset()			{return offset;}
	int getLength()			{return length;}

	void setData(byte _buf[],int offset, int length);
	void setData(byte _buf[]);

	void setAddress(struct in_addr iaddr);
	void setPort(int iPort);
	void setLength(int _length);

	struct sockaddr_in getSocketAddress();
private:
	byte *buf;
	int offset;
	int length;
	int bufLength;
	int port;
	struct in_addr *address;
	struct sockaddr_in InAddr;
};
#endif

DatagramPacket.cpp

#include "DatagramPacket.h"

		/* * * * * * * * * * * * * * * * */
		/*          类的实现             */
		/* * * * * * * * * * * * * * * * */	
DatagramPacket::DatagramPacket(byte _buf[], int _length, int _offset)
{
	setData(buf, offset, length);
	this->address = NULL;
	this->port = -1;
}

DatagramPacket::DatagramPacket(byte _buf[], int _length, struct in_addr _address, int _port, int _offset)
{
	setData(_buf, _offset, _length);
	setAddress(_address);
	setPort(_port);
}


void DatagramPacket::setData(byte _buf[],int _offset, int _length)
{
	if (_length < 0 || _offset < 0 || (_length + _offset) < 0 || 
		((_length + _offset) > sizeof(buf)))
			cout<<"illegal length or offset!"<buf = _buf;
	this->length = _length;
	this->bufLength = _length;
	this->offset = _offset;
}

void DatagramPacket::setData(byte _buf[])
{
	if (_buf == NULL)
		cout<<"null packet buffer"<buf = _buf;
	this->offset = 0;
	this->length = sizeof(_buf)/sizeof(byte);
	this->bufLength = sizeof(_buf)/sizeof(byte);
}

void DatagramPacket::setAddress(struct in_addr iaddr)
{
	address = &iaddr;
}

void DatagramPacket::setPort(int iPort)
{
	if (iPort < 0 || iPort > 0xFFF)
		cout<<"Port out of range: "< sizeof(buf) || _length < 0 || (_length+offset)< 0)
		cout<<"illegal length!"<length = _length;
	this->bufLength = this->length;
}

ReliableSocketListener.h

#pragma once

class ReliableSocketListener
{
public:
	//Invoked when a data packet is sent.
	virtual void packetSent();
	//Invoked when a data packet is retransmitted.
	virtual void packetRetransmitted();
	//Invoked when a data packet is received in-order.
	virtual void packetReceivedInOrder();
	//Invoked when a out of sequence data packet is received.
	virtual void packetReceivedOutOrder();
};

ReliableSocketOutputStream.h

#ifndef _RELIABLESOCKETOUTPUTSTREAM_H_
#define _RELIABLESOCKETOUTPUTSTREAM_H_
#include "ReliableSocket.h"
/*类的前向声明*/
class ReliableSocket;

class ReliableSocketOutputStream:public ostream
{
public:
	ReliableSocketOutputStream(ReliableSocket *sock);
	void write(int b);
	void write(unsigned char b[]);
	void write(unsigned char b[],int off,int len);
	void flush();
	void close();
protected:
	ReliableSocket *_sock;
	unsigned char *_buf;
	int _count;
private:
	pthread_mutex_t mutex;
};
#endif

ReliableSocketOutputStream.cpp

#include "ReliableSocketOutputStream.h"
using namespace std;


ReliableSocketOutputStream::ReliableSocketOutputStream(ReliableSocket *sock)
{
	if(sock==NULL)
	{
		cout<<"sock"<getSendBufferSize()];
	_count=0;
}
void ReliableSocketOutputStream::write(int b)
{
	int rc;
	rc=pthread_mutex_lock(&mutex);
	if(_count>=sizeof(_buf))
		ReliableSocketOutputStream::flush();
	_buf[_count++]=(unsigned char)(b&0xFF);
	rc=pthread_mutex_unlock(&mutex);
}
void ReliableSocketOutputStream::write(unsigned char b[])
{
	int rc;
	rc=pthread_mutex_lock(&mutex);
	write(b,0,sizeof(b));
	rc=pthread_mutex_unlock(&mutex);
}
void ReliableSocketOutputStream::write(unsigned char b[], int off, int len)
{
	int rc;
	rc=pthread_mutex_lock(&mutex);
	int buflen;
	int writtenBytes=0;
	while(writtenByteslen-writtenBytes)
			buflen=len-writtenBytes;
		else
			buflen=sizeof(_buf);
		if(buflen>sizeof(_buf)-_count)
			flush();
		for(size_t bindex=off+writtenBytes,_index=_count;_index!=_count+buflen;++bindex,++_index)
			_buf[_index]=b[bindex];
	
		_count+=buflen;
		writtenBytes+=buflen;
	}
	rc=pthread_mutex_unlock(&mutex);
}

void ReliableSocketOutputStream::flush()
{
	int rc;
	rc=pthread_mutex_lock(&mutex);
	if(_count>0){
		write(_buf,0,_count);
		_count=0;
	}
	rc=pthread_mutex_unlock(&mutex);
}

void ReliableSocketOutputStream::close()
{
	int rc;
	rc=pthread_mutex_lock(&mutex);
	this->flush();
	_sock->shutdownOutput();
	rc=pthread_mutex_unlock(&mutex);
}

ReliableSocketProfile.h

#pragma once
#include 

class ReliableSocketProfile
{
public:
	static const int MAX_SEND_QUEUE_SIZE;
	static const int MAX_RECV_QUEUE_SIZE;
	static const int MAX_SEGMENT_SIZE;
	static const int MAX_OUTSTANDING_SEGS;
	static const int MAX_RETRANS;
	static const int MAX_CUMULATIVE_ACKS;
	static const int MAX_OUT_OF_SEQUENCE;
	static const int MAX_AUTO_RESET;
	static const int NULL_SEGMENT_TIMEOUT;
	static const int RETRANSMISSION_TIMEOUT;
	static const int CUMULATIVE_ACK_TIMEOUT;
	
	int maxSendQueueSize(){return _maxSendQueueSize;}
	int maxRecvQueueSize(){return _maxRecvQueueSize;}
	int maxSegmentSize(){return _maxSegmentSize;}
	int maxOutstandingSegs(){return _maxOutstandingSegs;}
	int maxRetrans(){return _maxRetrans;}
	int maxCumulativeAcks(){return _maxCumulativeAcks;}
	int maxOutOfSequence(){return _maxOutOfSequence;}
	int maxAutoReset(){return _maxAutoReset;}
	int nullSegmentTimeout(){return _nullSegmentTimeout;}
	int retransmissionTimeout(){return _retransmissionTimeout;}
	int cumulativeAckTimeout(){return _cumulativeAckTimeout;}

	ReliableSocketProfile();
	ReliableSocketProfile(int maxSendQueueSize,int maxRecvQueueSize,int maxSegmentSize,int maxOutstandingSegs,int maxRetrans,
		int maxCumulativeAcks,int maxOutOfSequence,int maxAutoReset,int nullSegmentTimeout,int retransmissionTimeout,int cumulativeTimeout);

	std::string toString();
private:
	void checkValue(const std::string param,int value,int minValue,int maxValue);
	int _maxSendQueueSize;
	int _maxRecvQueueSize;
	int _maxSegmentSize;
	int _maxOutstandingSegs;
	int _maxRetrans;
	int _maxCumulativeAcks;
	int _maxOutOfSequence;
	int _maxAutoReset;
	int _nullSegmentTimeout;
	int _retransmissionTimeout;
	int _cumulativeAckTimeout;
};

ReliableSocketProfile.cpp

#include "ReliableSocketProfile.h"
#include 

using namespace std;

const int ReliableSocketProfile::MAX_SEND_QUEUE_SIZE   = 32;
const int ReliableSocketProfile::MAX_RECV_QUEUE_SIZE   = 32;
const int ReliableSocketProfile::MAX_SEGMENT_SIZE      = 128;
const int ReliableSocketProfile::MAX_OUTSTANDING_SEGS  = 3;
const int ReliableSocketProfile::MAX_RETRANS           = 3;
const int ReliableSocketProfile::MAX_CUMULATIVE_ACKS   = 3;
const int ReliableSocketProfile::MAX_OUT_OF_SEQUENCE   = 3;
const int ReliableSocketProfile::MAX_AUTO_RESET        = 3;
const int ReliableSocketProfile::NULL_SEGMENT_TIMEOUT  = 2000;
const int ReliableSocketProfile::RETRANSMISSION_TIMEOUT= 600;
const int ReliableSocketProfile::CUMULATIVE_ACK_TIMEOUT= 300;

ReliableSocketProfile::ReliableSocketProfile(){
	ReliableSocketProfile(MAX_SEND_QUEUE_SIZE,MAX_RECV_QUEUE_SIZE,MAX_SEGMENT_SIZE,MAX_OUTSTANDING_SEGS,0,MAX_CUMULATIVE_ACKS,MAX_OUT_OF_SEQUENCE,MAX_AUTO_RESET,NULL_SEGMENT_TIMEOUT,RETRANSMISSION_TIMEOUT,CUMULATIVE_ACK_TIMEOUT);
}

ReliableSocketProfile::ReliableSocketProfile(int maxSendQueueSize,int maxRecvQueueSize,int maxSegmentSize,int maxOutstandingSegs,	int maxRetrans,
		int maxCumulativeAcks,int maxOutOfSequence,int maxAutoReset,int nullSegmentTimeout,int retransmissionTimeout,int cumulativeAckTimeout)
{
	checkValue("maxSendQueueSize",     maxSendQueueSize,     1,  255);
	checkValue("maxRecvQueueSize",     maxRecvQueueSize,     1,  255);
	checkValue("maxSegmentSize",       maxSegmentSize,       22, 65535);
	checkValue("maxOutstandingSegs",   maxOutstandingSegs,   1,  255);
	checkValue("maxRetrans",           maxRetrans,           0,  255);
	checkValue("maxCumulativeAcks",    maxCumulativeAcks,    0,  255);
	checkValue("maxOutOfSequence",     maxOutOfSequence,     0,  255);
	checkValue("maxAutoReset",         maxAutoReset,         0,  255);
	checkValue("nullSegmentTimeout",   nullSegmentTimeout,   0,  65535);
	checkValue("retransmissionTimeout",retransmissionTimeout,100,65535);
	checkValue("cumulativeAckTimeout", cumulativeAckTimeout, 100,65535);

	_maxSendQueueSize      = maxSendQueueSize;
	_maxRecvQueueSize      = maxRecvQueueSize;
	_maxSegmentSize        = maxSegmentSize;
	_maxOutstandingSegs    = maxOutstandingSegs;
	_maxRetrans            = maxRetrans;
	_maxCumulativeAcks     = maxCumulativeAcks;
	_maxOutOfSequence      = maxOutOfSequence;
	_maxAutoReset          = maxAutoReset;
	_nullSegmentTimeout    = nullSegmentTimeout;
	_retransmissionTimeout = retransmissionTimeout;
	_cumulativeAckTimeout  = cumulativeAckTimeout;

}
string ReliableSocketProfile::toString()
{
	string sb="[";
	sb+=(_maxSendQueueSize+'0');
	sb+=",";
	sb+=(_maxRecvQueueSize+'0');
	sb+=",";
	sb+=(_maxSegmentSize+'0');
	sb+=",";
	sb+=(_maxOutstandingSegs+'0');
	sb+=",";
	sb+=(_maxRetrans+'0');
	sb+=",";
	sb+=(_maxCumulativeAcks+'0');
	sb+=",";
	sb+=(_maxOutOfSequence+'0');
	sb+=",";
	sb+=(_maxAutoReset+'0');
	sb+=",";
	sb+=(_nullSegmentTimeout+'0');
	sb+=",";
	sb+=(_retransmissionTimeout+'0');
	sb+=",";
	sb+=(_cumulativeAckTimeout='0');
	sb+="]";
	return sb;
}
void ReliableSocketProfile::checkValue(const string param,int value,int minValue,int maxValue)
{
	if(valuemaxValue)
		throw new invalid_argument(param);
}

ReliableSocketStateListener.h

#pragma once
#include "ReliableSocket.h"
class ReliableSocket;
class ReliableSocketStateListener
{
public:
	virtual void connectionOpened(ReliableSocket *sock);
	virtual void connectionRefused(ReliableSocket *sock);
	virtual void connectionClosed(ReliableSocket *sock);
	virtual void connectionFailure(ReliableSocket *sock);
	virtual void connectionReset(ReliableSocket *sock);
};

Segment.h

#ifndef SEGMENT_H
#define SEGMENT_H
#include 
#include 
#include 
#include 

class Segment{
public:
	static const int RUDP_VERSION;
	static const int RUDP_HEADER_LEN;
	static const unsigned char SYN_FLAG;
	static const unsigned char ACK_FLAG;
	static const unsigned char EAK_FLAG;
	static const unsigned char RST_FLAG;
	static const unsigned char NUL_FLAG;
	static const unsigned char CHK_FLAG;
	static const unsigned char FIN_FLAG;
	Segment():_nretx(0),_ackn(-1){}
	Segment* parse(unsigned char bytes[]);
	Segment* parse(unsigned char bytes[],int off,int len);
	unsigned char* getBytes();
	int flags() {return _flags;}
	int seq()   {return _seqn;}
	int length(){return _hlen;}
	int getRetxCounter() {return _nretx;}
	void setRetxCounter(int n) {_nretx=n;}
	int getAck();
	void setAck(int ackn);
	virtual std::string type();
private:
	int _flags;
	int _hlen;
	int _seqn;
	int _ackn;
	int _nretx;
protected:
	void init(int flags,int seqn,int len){_flags=flags;_seqn=seqn;_hlen=len;}
	void parseBytes(unsigned char bytes[],int off,int len);
};

/*SYNSegment class*/
class SYNSegment:public Segment
{
public:
	SYNSegment(){}
	SYNSegment(int seqn, int maxseg, int maxsegsize, int rettoval,
            int cumacktoval, int niltoval, int maxret,
            int maxcumack, int maxoutseq, int maxautorst);

	int getVersion()		{return _version;}
	int getMaxOutstandingSegments()	{ return _maxseg;}
	int getOptionFlags()		{ return _optflags;}
	int getMaxSegmentSize()		{ return _maxsegsize;}
	int getRetransmissionTimeout()	{ return _rettoval;}
	int getCumulativeAckTimeout()	{ return _cumacktoval;}
	int getNulSegmentTimeout()	{ return _niltoval;}
	int getMaxRetransmissions()	{ return _maxret;}
	int getMaxCumulativeAcks()	{ return _maxcumack;}
	int getMaxOutOfSequence()	{return _maxoutseq;}
	int getMaxAutoReset()		{ return _maxautorst;}
	unsigned char* getBytes();

protected:
	void parseBytes(unsigned char buffer[], int off, int len);

private: 
	int  _version;
	int  _maxseg;
	int  _optflags;
	int  _maxsegsize;
	int  _rettoval;
	int  _cumacktoval;
	int  _niltoval;
	int  _maxret;
	int  _maxcumack;
	int  _maxoutseq;
	int  _maxautorst;
	static const int SYN_HEADER_LEN ;//6+16
};
/*NULSegment*/
class NULSegment:public Segment
{
public:
	NULSegment(){}
	NULSegment(int seqn);
	std::string type(){return "NUL";}
};

/*ACKSegment class*/
class ACKSegment:public Segment
{
public:
	ACKSegment(){}
	ACKSegment(int seqn,int ackn);
	std::string type(){return "ACK";}
};

/*EAKSegment class*/
class EAKSegment:public ACKSegment
{
public:
	EAKSegment(){}
	EAKSegment(int seqn,int ackn,int acks[]);
	std::string type(){return "EAK";}
	int* getACKs(){return _acks;}
	unsigned char* getBytes();

protected:
	void parseBytes(unsigned char buffer[],int off,int len);
private:
	int *_acks;
};

/*RSTSegment class*/
class RSTSegment:public Segment
{
public:
	RSTSegment(){};
	RSTSegment(int seqn);
	std::string type(){return "RST";}
};

/*FINSegment class*/
class FINSegment:public Segment
{
public:
	FINSegment(){};
	FINSegment(int seqn);
	std::string type(){return "FIN";}
};

/*DATSegment class*/
class DATSegment:public Segment{
public:
	DATSegment(){}
	DATSegment(int seqn,int ackn,unsigned char b[],int off,int len);
	int length(){return sizeof(_data)+Segment::length();}
	unsigned char* getBytes();
	void parseBytes(unsigned char buffer[],int off, int len);
	unsigned char* getData(){return _data;}
private:
	unsigned char *_data;
};
#endif

Segment.cpp

#include "Segment.h"
using namespace std;

	/* * * * * * * * * * * */
	/*    类的实现部分!      */
	/* * * * * * * * * * * */

const int Segment::RUDP_VERSION=1;
const int Segment::RUDP_HEADER_LEN=6;
const unsigned char Segment::SYN_FLAG=(unsigned char)0x80;
const unsigned char Segment::ACK_FLAG=(unsigned char)0x40;
const unsigned char Segment::EAK_FLAG=(unsigned char)0x20;
const unsigned char Segment::RST_FLAG=(unsigned char)0x10;
const unsigned char Segment::NUL_FLAG=(unsigned char)0x08;
const unsigned char Segment::CHK_FLAG=(unsigned char)0x04;
const unsigned char Segment::FIN_FLAG=(unsigned char)0x02;

int Segment::getAck()
{
	if((_flags&Segment::ACK_FLAG)==Segment::ACK_FLAG)
		return _ackn;
	else
		return -1;
} 

void Segment::setAck(int ackn)
{
	_flags=_flags|Segment::ACK_FLAG;
	_ackn=ackn;
}

unsigned char* Segment::getBytes()
{
	unsigned char *buffer=new unsigned char[length()];
	buffer[0]=(unsigned char)(_flags&0xFF);
	buffer[1]=(unsigned char)(_hlen&0xFF);
	buffer[2]=(unsigned char)(_seqn&0xFF);
	buffer[3]=(unsigned char)(_ackn&0xFF);
	return buffer;
}

Segment* Segment::parse(unsigned char bytes[])
{
	return parse(bytes,0,sizeof(bytes));
}
Segment* Segment::parse(unsigned char bytes[],int off,int len)
{
	Segment *segment = NULL;
	if(lenparseBytes(bytes,off,len);
	return segment;
}


void Segment::parseBytes(unsigned char buffer[],int off,int len)
{
	_flags =(buffer[off]&0xFF);
	_hlen  =(buffer[off+1]&0xFF);
	_seqn  =(buffer[off+2]&0xFF);
	_ackn  =(buffer[off+3]&0xFF);
}
/*SYNSegment class define*/
SYNSegment::SYNSegment(int seqn, int maxseg, int maxsegsize, int rettoval,
            int cumacktoval, int niltoval, int maxret,
            int maxcumack, int maxoutseq, int maxautorst)
    {
        init(SYN_FLAG, seqn, SYN_HEADER_LEN);

        _version = RUDP_VERSION;          
        _maxseg = maxseg;                    
        _optflags = 0x01; /* no options */   
        _maxsegsize = maxsegsize;           
        _rettoval = rettoval;                
        _cumacktoval = cumacktoval;
        _niltoval = niltoval;
        _maxret = maxret;
        _maxcumack = maxcumack;
        _maxoutseq = maxoutseq;
        _maxautorst = maxautorst;
    }
unsigned char* SYNSegment::getBytes()
    {
        unsigned char *buffer=Segment::getBytes();
        buffer[4] = (unsigned char) ((_version << 4) & 0xFF);
        buffer[5] = (unsigned char) (_maxseg & 0xFF);
        buffer[6] = (unsigned char) (_optflags & 0xFF);
        buffer[7] = 0; /* spare */
        buffer[8] = (unsigned char) ((_maxsegsize >> 8) & 0xFF);
        buffer[9] = (unsigned char) ((_maxsegsize >> 0) & 0xFF);
        buffer[10] = (unsigned char) ((_rettoval >> 8) & 0xFF);
        buffer[11] = (unsigned char) ((_rettoval >> 0) & 0xFF);
        buffer[12] = (unsigned char) ((_cumacktoval >> 8) & 0xFF);
        buffer[13] = (unsigned char) ((_cumacktoval >> 0) & 0xFF);
        buffer[14] = (unsigned char) ((_niltoval >> 8) & 0xFF);
        buffer[15] = (unsigned char) ((_niltoval >> 0) & 0xFF);
        buffer[16] = (unsigned char) (_maxret & 0xFF);
        buffer[17] = (unsigned char) (_maxcumack & 0xFF);
        buffer[18] = (unsigned char) (_maxoutseq & 0xFF);
        buffer[19] = (unsigned char) (_maxautorst & 0xFF);

        return buffer;
    }
void SYNSegment::parseBytes(unsigned char buffer[], int off, int len)
    {
	   Segment::parseBytes(buffer, off, len);

        if (len < (SYN_HEADER_LEN)) {
            cout<<"Invalid SYN segment"<> 4);
        if (_version != RUDP_VERSION) {
            cout<<"Invalid RUDP version"<

Thread.h

#ifndef _THREAD_H
#define _THREAD_H

#include 
#include 

class Runnable
{
public:
	virtual void run()=0;
};

class Thread:public Runnable
{
private:
	//线程初始化序号
	static int threadInitNumber;
	//当前线程初始化序号
	int curThreadInitNumber;
	//线程体；
	Runnable *target;
	//当前线程的线程ID
	pthread_t tid;
	//线程的状态
	int threadStatus;
	//线程属性
	pthread_attr_t attr;
	//线程优先级
	sched_param param;
	//获取执行方法的指针
	static void* run0(void* pVoid);
	//内部执行方法
	void* run1();
	//获取一个线程序号
	static int getNextThreadNum();
public:
    	//线程的状态－新建
	static const int THREAD_STATUS_NEW = 0;
	//线程的状态－正在运行
	static const int THREAD_STATUS_RUNNING = 1;
	//线程的状态－运行结束
	static const int THREAD_STATUS_EXIT = -1;
	//构造函数
	Thread();
	Thread(Runnable *iTarget);
	//析构函数
	~Thread();
	//线程的运行实体
	void run();
	//开始执行线程
	bool start();
	//获取线程状态
	int getState();
	//等待线程直至退出
	void join();
	//等待线程退出或者超时
	void join(unsigned long millisTime);
	//比较两个线程时候相同，通过curThreadInitNumber判断
	bool operator==(const Thread *otherThread);
	//获取this线程ID
	pthread_t getThreadID();
	//获取当前ID
	static pthread_t getCurrentThreadID();
	//当前线程是否和模个线程相等，通过tid判断
	static bool isEquals(Thread *iTarget);
	//设置线程的类型：绑定/非绑定
	void setThreadScope(bool isSystem);
	//获取线程的类型：绑定/非绑定
	bool getThreadScope();
	//设置线程的优先级，1-99，其中99为实时；其他的为普通
	void setThreadPriority(int priority);
	//获取线程的优先级
	int getThreadPriority();
};

#endif/*_THREAD_H*/

Thread.cpp

#include "Thread.h"

int Thread::threadInitNumber=1;
inline int Thread::getNextThreadNum()
{
	return threadInitNumber++;
}
void* Thread::run0(void* pVoid)
{
	Thread* p=(Thread*)pVoid;
	p->run1();
	return p;
}

void* Thread::run1()
{
	threadStatus=THREAD_STATUS_RUNNING;
	tid=pthread_self();
	run();
	threadStatus=THREAD_STATUS_EXIT;
	tid=0;
	pthread_exit(NULL);
}
void Thread::run()
{
	if(target!=NULL)
	{
		(*target).run();
	}
}

Thread::Thread(Runnable *iTarget)
{
	target=iTarget;
	tid=0;
	threadStatus=THREAD_STATUS_NEW;
	curThreadInitNumber=getNextThreadNum();
	pthread_attr_init(&attr);
}

Thread::~Thread()
{
	pthread_attr_destroy(&attr);
}

bool Thread::start()
{
	return pthread_create(&tid,NULL,run0,this)==0;
}
inline pthread_t Thread::getCurrentThreadID()
{
	return pthread_self();
}
inline pthread_t Thread::getThreadID()
{
	return tid;
}
inline int Thread::getState()
{
	return threadStatus;
}
void Thread::join()
{
	if(tid > 0)
	{
		pthread_join(tid, NULL);
	}
}
void Thread::join(unsigned long millisTime)
{
	if(tid == 0){
		return;
	}
	if(millisTime == 0)
	{
	join();
	}else
	{
		unsigned long k=0;
		while(threadStatus != THREAD_STATUS_EXIT && k <= millisTime)
		{
			usleep(100);
			k++;
		}
	}

}

bool Thread::operator==(const Thread *otherThread)
{
	if(otherThread==NULL)
	{
	return false;
	}
	if(curThreadInitNumber==(*otherThread).curThreadInitNumber)
	{
	return true;
	}
	return false;
}

bool Thread::isEquals(Thread *iTarget)
{
	if(iTarget==NULL)
	{
		return false;
	}
	return pthread_self()==iTarget->tid;
}

void Thread::setThreadScope(bool isSystem)
{
	if(isSystem)
	{
		pthread_attr_setscope(&attr, PTHREAD_SCOPE_SYSTEM);
	}else
	{
		pthread_attr_setscope(&attr, PTHREAD_SCOPE_PROCESS);
	}
}

bool Thread::getThreadScope()
{
	int scopeType=0;
	pthread_attr_getscope(&attr,&scopeType);
	return scopeType==PTHREAD_SCOPE_SYSTEM;
}
void Thread::setThreadPriority(int priority)
{
	pthread_attr_getschedparam(&attr,¶m);
	param.__sched_priority=priority;
	pthread_attr_setschedparam(&attr,¶m);
}
int Thread::getThreadPriority()
{
	pthread_attr_getschedparam(&attr,¶m);
	return param.__sched_priority;
}

Timer.h

#ifndef TIMER_H_
#define TIMER_H_
#include "Thread.h"
#include 
#include 

class Timer:public Thread
{
public:
	Timer(Runnable *iTarget):Thread(iTarget){start();}
	void run();
	void schedule(long delay, long period = 0);
	bool isScheduled();
	bool isIdle();
	void reset();
	void cancel();
	void destroy();
private:
	Runnable *_task;
	long _delay;
	long _period;
	bool _scheduled;
	bool _reset;
	bool _stopped;
	bool _canceled;
	pthread_mutex_t _lock;
	pthread_mutex_t mutex;
	pthread_cond_t cond;
};
#endif

#include "Timer.h"
#include 
using namespace std;

void Timer::run()
{
	int rc;
	while(!_stopped)
	{
		rc = pthread_mutex_lock(&mutex);
		while (!_scheduled && !_stopped)
		{
			pthread_cond_wait(&cond,&mutex);
		}
		if (_stopped)
			break;
		rc = pthread_mutex_unlock(&mutex);

		rc = pthread_mutex_lock(&_lock);
		_reset = false;
		_canceled = false;
		
		if (_delay > 0)
		{
			try 
			{
			pthread_cond_wait(&cond, &_lock); //需要转换为该接口函数需要的参数类型
			}
			catch(...)
			{
			cout<<"exception!"<run();
		
		if (_period>0)
		{
			while(true)
			{
				rc = pthread_mutex_lock(&_lock);
				_reset = false;
				try
				{
				pthread_cond_wait(&cond, &_lock);
				}
				catch(...)
				{
				cout<<"exception"<run();
			}
		}		
	}
}

void Timer::schedule(long delay, long period)
{
	int rc;
	_delay = delay;
	_period = period;
	
	if (_scheduled)
		cout<<"already scheduled"<