[Dev-C++] Static members for callbacks

[Abhijit S. <mu...@gm...>]

[Today...]

> That static-members issue of yours confused me.

[...much, much long ago, in a land far, far away...]

>  Another rule
> to tag on
> to using static members for
> callbacks.

[... same land, somewhere between the two...]

> I am facing a tricky problem. I have defined a class,
> in which there are few funtions written for
> implementing multithreading. I have a funtion named
> "createThreads_()", which creates few threads. There
> is another function declared in the class, "DWORD
> WINAPI threadEntry_(LPVOID)". This function pointer
> has been passed in the CREATETHREAD(..) call, which is
> being raised as an error in VC++ compier.
> It gives the error like,

blah

> If I use any external function Thread Function(making
> it as friend to the class) then compilation is
> through, WHICH IS AS EXPECTED.
> Similarly, if I make the "threadEntry_(..)" in class
> as STATIC and use it in CREATETHREAD(..) call then
> also compilation is through. But making STATIC wont
> serve my purpose.
> I can go ahead with using external function by making
> int as friend to the class.

[... back to right now...]

Okay... putting eleventeen and twenty kazillion together... it seems you
cannot callback to non-static member functions (i.e., you cannot have a
function pointer pointing to a non-static method).

I tried creating a class to test this, and I discovered that it's true...
why?

I tried callback = this->internal, testclass::internal, this::internal...
yup, I got pret-ty desparate.

I also tried casting the method, using type-casting (C-style), static_cast
and dynamic_cast to a pointer, but it doesn't work. I get an error about
converting to a pointer and compilation stops.

[... back to the day I first rode a bike... hey, it's *my* post.]