多线程编程，编译时提示invalid use of member （did you forget the &）,找不到原因。

#include "igrs.h"



//Singlecast Message Server.

void CDevice::SingleMsgServer(string strHost, unsigned uPort)

{

	struct sockaddr_in addr;

	memset(&addr, 0, sizeof(addr));

	addr.sin_family = AF_INET;

	inet_aton(strHost.c_str(), &addr.sin_addr);

	addr.sin_port = htons(uPort);

	int s = socket(AF_INET, SOCK_STREAM, 0);

	if (s < 0)

	{

		perror("socket error in SingleMsgServer\n");

		return ;

	}

	if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0)

	{

		perror("bind error in SingleMsgServer\n");

		return ;

	}

	if (listen(s, LISTEN_MAX_NUM) < 0)

	{

		perror("listen error in SingleMsgServer\n");

		return ;

	}

	struct sockaddr_in clientAddr;

	socklen_t len;

	pthread_t th;

	for (;;)

	{

		int newS = accept(s, (struct sockaddr *)&clientAddr, &len);

		if (newS < 0)

		{

			perror("accept error in SingleMsgServer.\n");

		}

		//create a thread which runs handleSingleMsg to handle the new connect.

                //错误在这一行

		if (pthread_create(&th, NULL, (void *(*)(void *))HandleSingleMsg, (void *)&newS) < 0)

		{

			perror("pthread_create error in SingleMsgServer.\n");

		}

	}

}



//When SingleMsgServer accepts a connect request, 

//HandleSingleMsg handles the connect as a thread.

void CDevice::HandleSingleMsg(int fd)

{

	int n;  

	char tmp[BUF_MAX_SIZE];

	for (;;)

	{

		if ((n = recv(fd, tmp, BUF_MAX_SIZE, 0)) < 0)

		{

			perror("recv error in SingleMsgServer.\n");

		}

		else

		{

			tmp[n] = '\0';

		  string ackMsg = MsgResolver(tmp);

			//if gotten message is request message, then send response message.

			if (!ackMsg.empty())

			{		

				if (send(fd, ackMsg.c_str(), ackMsg.size(), 0) < 0)

				{

					perror("send error in SingleMsgServer.\n");

				}

			}

		}

	}

}