QT跨线程的信号与槽[2]---后台SOCKET

继上一篇文章

大体实现了一个与UI线程分离的SOCKET封装类

即后台线程负责收发数据包，有数据到来则通知UI线程

UI线程发送数据时通知后台线程（异步）

嗯，大概是这个意思

#pragma once
#include <QTcpSocket>
#include <QByteArray>
#include "XBackgroundWorker.h"

class CXAsyncSocket : public CXBackgroundWorker
{
	Q_OBJECT
public:
	explicit CXAsyncSocket(void);
	virtual ~CXAsyncSocket(void);
private:
	QTcpSocket *m_TcpSocket;
private slots:
	void Construct_Invokee();
	void Destruct_Invokee();
	void Connect_Invokee(char *host, quint16 port);
	void DisConnect_Invokee();
	void Send_Invokee(QByteArray buffer);
public:
	static void RegisterMetaTypes();

	// 下面三个函数用于前台线程
	void Connect(char *host, quint16 port);
	void DisConnect();
	void Send(QByteArray buffer);
private slots:
	// 执行环境为后台线程
	void OnReceive();
protected:
	// 执行环境为后台线程
	virtual void OnReceiveBuffer(QByteArray &buffer) = 0;
signals:
	void OnConnect();
	void OnDisConnect();
	void OnException(QAbstractSocket::SocketError);
};

#include "XAsyncSocket.h"

CXAsyncSocket::CXAsyncSocket()
{
	m_TcpSocket = NULL;
	QMetaObject::invokeMethod(this, "Construct_Invokee", Qt::BlockingQueuedConnection);
	Q_ASSERT(m_TcpSocket != NULL);
}

CXAsyncSocket::~CXAsyncSocket(void)
{
	Q_ASSERT(m_TcpSocket != NULL);
	QMetaObject::invokeMethod(this, "Destruct_Invokee", Qt::BlockingQueuedConnection);
	Q_ASSERT(m_TcpSocket == NULL);
}

void CXAsyncSocket::RegisterMetaTypes()
{
	qRegisterMetaType<char*>("char*");
	qRegisterMetaType<QAbstractSocket::SocketError>("QAbstractSocket::SocketError");
}

void CXAsyncSocket::Construct_Invokee()
{
	m_TcpSocket = new QTcpSocket;
	connect(m_TcpSocket, SIGNAL(connected()), this, SIGNAL(OnConnect()), Qt::QueuedConnection);
	connect(m_TcpSocket, SIGNAL(disconnected()), this, SIGNAL(OnDisConnect()), Qt::QueuedConnection);
	connect(m_TcpSocket, SIGNAL(error(QAbstractSocket::SocketError)), 
		this, SIGNAL(OnException(QAbstractSocket::SocketError)), Qt::QueuedConnection);
	connect(m_TcpSocket, SIGNAL(readyRead()), this, SLOT(OnReceive()), Qt::QueuedConnection);
}

void CXAsyncSocket::Destruct_Invokee()
{
	m_TcpSocket->disconnect();
	m_TcpSocket->abort();
	delete m_TcpSocket;
	m_TcpSocket = NULL;
}

void CXAsyncSocket::Connect_Invokee(char *host, quint16 port)
{
	m_TcpSocket->connectToHost(host, port);
}

void CXAsyncSocket::Connect(char *host, quint16 port)
{
	QMetaObject::invokeMethod(this, "Connect_Invokee", Qt::QueuedConnection, Q_ARG(char*, host), Q_ARG(quint16, port));
}

void CXAsyncSocket::DisConnect_Invokee()
{
	m_TcpSocket->abort();
}

void CXAsyncSocket::DisConnect()
{
	QMetaObject::invokeMethod(this, "DisConnect_Invokee", Qt::QueuedConnection);
}

void CXAsyncSocket::Send_Invokee(QByteArray buffer)
{
	m_TcpSocket->write(buffer);
}

void CXAsyncSocket::Send(QByteArray buffer)
{
	QMetaObject::invokeMethod(this, "Send_Invokee", Qt::QueuedConnection, Q_ARG(QByteArray, buffer));
}

void CXAsyncSocket::OnReceive()
{
	OnReceiveBuffer(m_TcpSocket->readAll());
}