Re: How to wrap a thread?

From:
"Scott McPhillips [MVP]" <org-dot-mvps-at-scottmcp>
Newsgroups:
microsoft.public.vc.language
Date:
Tue, 28 Jul 2009 22:30:53 -0400
Message-ID:
<uQG2bS$DKHA.4184@TK2MSFTNGP02.phx.gbl>
The thread function must be static. That is, either a static function or a
static member function. This is a requirement of the operating system, so
threads can be C compatible.

"Jack" <jl@knight.com> wrote in message
news:ekoJg8%23DKHA.4316@TK2MSFTNGP04.phx.gbl...

Hello,
I can't seem to solve this problem for hours
My original code,

#pragma once

#include <string>

#include <afxwin.h>

#include <process.h>

using namespace std;

enum { MANAGE_DISPLAY = 0, };

class Thread_Factory

{

// typedef UINT ((AFX_THREADPROC) MyFuncPtrType)(LPVOID arg);

public:

Thread_Factory(void);

~Thread_Factory(void);

public:

void StartThread(int DelegateNo);

};

And

#include <process.h>

#include "StdAfx.h"

#include ".\thread_factory.h"

UINT Manage_Dis(void *arg);

Thread_Factory::Thread_Factory(void)

{

}

Thread_Factory::~Thread_Factory(void)

{

}

void Thread_Factory::StartThread(int DelegateNo)

{

switch (DelegateNo)

{

case MANAGE_DISPLAY:

//dele = (AFX_THREADPROC)Manage_Dis;

AfxBeginThread(Manage_Dis, (LPVOID)0, NULL);

break;

default:

;

}

}

UINT Manage_Dis(LPVOID arg)

{

return 0;

}

And this works properly, but when I want to wrap it into a class

like this

#pragma once

#include <string>

#include <afxwin.h>

#include <process.h>

using namespace std;

enum { MANAGE_DISPLAY = 0, };

class Thread_Factory

{

// typedef UINT ((AFX_THREADPROC) MyFuncPtrType)(LPVOID arg);

public:

Thread_Factory(void);

~Thread_Factory(void);

public:

void StartThread(int DelegateNo);

UINT Manage_Dis(LPVOID arg);

//static UINT ((AFX_THREADPROC)Manage_Dis)(LPVOID);

// AFX_THREADPROC Dele;

};

And

#include <process.h>

#include "StdAfx.h"

#include ".\thread_factory.h"

//UINT Manage_Dis(void *arg);

Thread_Factory::Thread_Factory(void)

{

}

Thread_Factory::~Thread_Factory(void)

{

}

void Thread_Factory::StartThread(int DelegateNo)

{

switch (DelegateNo)

{

case MANAGE_DISPLAY:

//dele = (AFX_THREADPROC)Manage_Dis;

AfxBeginThread((AFX_THREADPROC)Thread_Factory::Manage_Dis, (LPVOID)0,
NULL);

break;

default:

;

}

}

UINT Thread_Factory::Manage_Dis(LPVOID arg)

{

return 0;

}

I get this:

c:\Documents and Settings\Jacky\My Documents\Visual Studio
Projects\ComDemo\Thread_Factory.cpp(23): error C2440: 'type cast' : cannot
convert from 'overloaded-function' to 'AFX_THREADPROC'

Is there anyway I can work around this?

Thanks

Jack


--
Scott McPhillips [VC++ MVP]

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