Re: Globals

This problem is really annoying, so here it is

testTrace.cpp:
--8<---------------cut here---------------start------------->8---
// -*- compile-command: "g++ testTrace.cpp Trace.cpp"-*-
#include <iostream>
#include "Globals.h"
#include "Trace.h"

using namespace std;

int main()
{
    GLOBALS::trace_length = 10;
    cout << GLOBALS::trace_length << endl;
    Trace t;

    return 0;
}
--8<---------------cut here---------------end--------------->8---

Trace.h
--8<---------------cut here---------------start------------->8---
#ifndef TRACE_H
#define TRACE_H

#include <map>
#include <vector>
#include "RingBuffer.h"
#include "PadNodeID.h"
#include "Globals.h"

class Trace
{
private:
    RingBuffer<PadNodeID> empty;
    std::map<PadNodeID, PadNodeID> trace;

public:
    Trace();
};

#endif /* TRACE_H */
--8<---------------cut here---------------end--------------->8---

Trace.cpp
--8<---------------cut here---------------start------------->8---
#include <iostream>
#include "Globals.h"
#include "Trace.h"
#include "PadNodeID.h"

Trace::Trace () : empty(GLOBALS::trace_length)
{
    std::cout << GLOBALS::trace_length;
}
--8<---------------cut here---------------end--------------->8---

Globals.h
--8<---------------cut here---------------start------------->8---
#ifndef GLOBALS_H
#define GLOBALS_H

#include <iostream>
#include "Environment.h"
#include "Globals.h"

namespace GLOBALS
{
    static int num_landmarks;
    static int trace_length;
    static int history_size;
    static int distribution_size;
    static Environment *environment;
    // see why this error
    static ostream *out;
}

#endif /* GLOBALS_H */
--8<---------------cut here---------------end--------------->8---

The guards are there, so it should be actually included only once, BUT
the second time I print the variable in the constructor is ALWAYS 0!!

Anything else or a completely different approach I could follow?

And the second problem is that I can't declare the map like that,
because the RingBuffer constructor is

RingBuffer(size_t max_size) : max_size(max_size) {};

The only way I see now is to add a default null constructor and set the
value later, but I don't really like it that much...

I solved that for other types using the initialization in the
Constructor but I don't understand how to do it here...