#pragma once

#include <memory>

class CThreadPool
{
public:

    template <typename T>
    static void QueueUserWorkItem(void (T::*function)(void), T *object, ULONG flags = WT_EXECUTELONGFUNCTION)
    {
        typedef std::pair<void (T::*)(), T *> CallbackType;
        std::auto_ptr<CallbackType> p(new CallbackType(function, object));
        if (::QueueUserWorkItem(ThreadProc<T>, p.get(), flags))
            p.release();
        else
            throw GetLastError();
    }

private:
    template <typename T>
    static DWORD WINAPI ThreadProc(PVOID context)
    {
        typedef std::pair<void (T::*)(), T *> CallbackType;

        std::auto_ptr<CallbackType> p(static_cast<CallbackType *>(context));

        (p->second->*p->first)();
        return 0;
    }
};