Strange type incompatibility using function pointers

Hey guys/girls ! I'm programming an application for which I have built classes ThreadedWorker and ThreadedWorkerManager. The ThreadedWorkerManager class needs to have a pointer to the callback function that will be used by the CreateThread() function. To lighten up a little bit the code, I have typedef'ed the function pointer and named it THREAD_PROC. The constructor of my ThreadedWorkerManager class takes a THREAD_PROC as only argument and later uses it. However, when I instantiate it, I get the following error:

Code:

'ThreadedWorkerManager<T>::ThreadedWorkerManager(THREAD_FUNC)' : cannot convert parameter 1 from 'DWORD (void *)' to 'THREAD_FUNC'
        with
        [
            T=WorkData *
        ]

I don't quite get why it complains, here's part of the code for ThreadedWorkerManager:

Code:

typedef DWORD (*THREAD_FUNC)(void*);

template <typename T> class ThreadedWorkerManager;
template <typename T> class ThreadedWorker;

template <typename T>
class ThreadedWorkerManager {
public:
	ThreadedWorkerManager(THREAD_FUNC ptr = 0) : WorkerProc(ptr) {
		// ...
	}

	// ...
private:
	THREAD_FUNC WorkerProc;
	//...
};

And this, is where the error occurs:

Code:

DWORD WINAPI ThreadProc(void* data) {
	// ...
}

SettingsManager::SettingsManager() {
	// Bang ! I'm dead !
	TWMgr = new ThreadedWorkerManager<WorkData*>(ThreadProc);
	// ...
}

Do you guys have any idea of what could cause this error ? My friend and I are stumped and can't get how this is wrong.

Thanks.

PS: I'm using MSVC++ 7.1

That WINAPI changes it (__stdcall, default is __cdecl).

Your calling conventions don't match. The typedef needs to be:

Code:

typedef DWORD (WINAPI *THREAD_FUNC)(void*);

Thanks. I fixed the other dozen of errors and now I'm ready to test. Lots of fun predicted -.-

Ahah, thanks again mates.