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

[phz1985]

#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");
				}
			}
		}
	}
}

# g++ -c single_msg_server.cpp
single_msg_server.cpp: In member function ‘void CDevice::SingleMsgServer(std::string, unsigned int)’:
single_msg_server.cpp:38: 错误：invalid use of member (did you forget the ‘&’ ?)
使用的编译是g++.

[leeyiqun]

if (pthread_create(&th, NULL, (void *(*)(void *))HandleSingleMsg, (void *)&newS) < 0)
改成这样：
if (pthread_create(&th, NULL, HandleSingleMsg, (void *)&newS) < 0)

然后 void CDevice::HandleSingleMsg(int fd)
改成 void *CDevice::HandleSingleMsg(int fd)

[dsadsadsa11]

个人觉得如果你的HandleSingleMsg 函数定义的返回类型不是void *，那么你做个转换试试：
(void *) & HandleSingleMsg

HandleSingleMsg这些函数名本来就是指针的

[qsxiaoyao]

mark

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楼主，你不贴头文件我只有猜想了，我猜你的HandleSingleMsg不是静态成员函数，就是没有加static标识符。
类非静态的成员函数是不能作为线程函数启动的，因为this指针的缘故。我建议楼主检查下头文件，看看是否是忘了给HandleSingleMsg前面加上static标识。

[joyself]

支持楼上两位


请贴出头文件，

还有在语句
if (pthread_create(&th, NULL, (void *(*)(void *))HandleSingleMsg, (void *)&newS) < 0)
里的转换 (void *(*)(void *))HandleSingleMsg 确实让人眼花缭乱。


个人觉得如果你的HandleSingleMsg 函数定义的返回类型不是void *，那么你做个转换试试：
(void *) & HandleSingleMsg

[dsadsadsa11]

。。。1 ，3 楼的两位，我看你们没有相关经验