<Windows.h> c++ threads and inheritance - c++

Question

Hello guys I'm working on a Thread class and a CountingThread class inherated from Thread class including Synchronized Counter using library. But while creating this CountingThread class I'm having a problem of "incomplete type is not allowed" So i would be happy if you give some advise if I'm forming this Thread abstract class in a bad structure or say what am I doing wrong. (FYI i have to keep classes and methods because it's an assignment)
#ifndef _THREAD_H_
#define _THREAD_H_
#include <Windows.h>
#include <iosfwd>
class Thread{
private:
HANDLE hThread;
int idThread;
public:
Thread(LPTHREAD_START_ROUTINE fnct){ // here I'm trying to get a function and create thread with it
hThread = CreateThread(NULL, 0,fnct,NULL,0,(LPDWORD)&idThread);
}
virtual void main()=0;
void suspend(){
SuspendThread(hThread);
}
void resume(){
ResumeThread(hThread);
}
void terminate(){
TerminateThread(hThread,0);
}
static void sleep(int sec){
Sleep(sec*1000);
}
};
#endif
CountingThread.h
#ifndef _COUNTINGTHREAD_H_
#define _COUNTINGTHREAD_H_
#include "SynchronizedCounter.h"
#include "Thread.h"
class CountingThread :public Thread{
private:
SynchronizedCounter counter;
public:
CountingThread(counter.increment()){ // here I'm having the error "incomplete type on counter"
} // I want to create thread with the counter.increment function
};
#endif
SynchronizedCounter.h
#ifndef SYNCHRONIZEDCOUNTER_H_
#define SYNCHRONIZEDCOUNTER_H_
#include "Mutex.h"
#include <iosfwd>
class SynchronizedCounter{
private:
int count;
public:
SynchronizedCounter();
SynchronizedCounter(int);
void increment();
int value();
friend std::ostream &operator <<(std::ostream& output, const SynchronizedCounter& counter)
{
output << counter.count << endl;
return output;
}
};
#endif
and synchronizedCounter::increment
void SynchronizedCounter::increment(){
Mutex mut;
mut.lock;
count++;
mut.unlock;
}

Answer 1

Seems to to be a syntax error. You should define an argument here :
So it should be:
class CountingThread :public Thread{
private:
SynchronizedCounter counter;
public:
CountingThread()
{
counter.increment())
//... etc
} // I want to create thread with the counter.increment function
//...
};
Anyway as counter.increment() returns void, you cannot pass it as parameter.