🚀 go-pugleaf

Ahh, I see!  This makes perfect sense now!

Thanks to both of you!

Alistair

"Alan Bellingham" <alanb@episys.com> wrote in message 
news:2ngsn09863v09thnhue7rtap2h09p2clg5@4ax.com...
> "Alistair" <Alistair@NoSpam.Sodoff> wrote:
>
>>So what you are saying is that I have no way of including a function in my
>>class that is passed to the WINAPI CreateThread method?
>
> No, that's not what he said.
>
> What he was telling you is that a normal member function cannot be
> passed to CreateThread, simply because it requires a free (aka 'global')
> function. However, when it calls the function you supplied, it passes a
> void* pointer, the same one you gave it when you called
> ::CreateThread().
>
> You therefore want to use this pointer to carry around an object
> pointer, as this:
>
>  class MyThread
>  {
>     public:
>              void         CreateThread();
>              DWORD        ThreadProc2 ();
>       static DWORD WINAPI ThreadProc  (void* Param);
>  );
>
>  void
>  MyThread::CreateThread()
>  {
>     // ...
>     ::CreateThread(..., ..., ThreadProc, this, ..., ...);
>  }
>
>  DWORD
>  MyThread::ThreadProc(void* Param)
>  {
>     // static casting to member function
>     return static_cast<MyThread*>(Param)->ThreadProc2();
>  }
>
>  DWORD
>  MyThread::ThreadProc2()
>  {
>     // A normal member function you can do with as you like
>  }
>
> If you want multiple threads within a single object, it obviously gets a
> little trickier, but using subobjects will sort that.
>
> Alan Bellingham
> -- 
> ACCU Conference 2005 - 20-23 April, Randolph Hotel, Oxford, UK