// ObjectTracker.h

#include <new>
#include <typeinfo>

#include <AutoLocker.h>

#include "Debug.h"
#include "ObjectTracker.h"

static char sTrackerBuffer[sizeof(ObjectTracker)];

// constructor
ObjectTrackable::ObjectTrackable()
{
        ObjectTracker* tracker = ObjectTracker::GetDefault();
        if (tracker != NULL)
                tracker->AddTrackable(this);
}

// destructor
ObjectTrackable::~ObjectTrackable()
{
        ObjectTracker* tracker = ObjectTracker::GetDefault();
        if (tracker != NULL)
                tracker->RemoveTrackable(this);
}


// #pragma mark -

// constructor
ObjectTracker::ObjectTracker()
        : fLock("object tracker"),
          fTrackables()
{
}

// destructor
ObjectTracker::~ObjectTracker()
{
        ObjectTrackable* trackable = fTrackables.First();
        if (trackable) {
                WARN(("ObjectTracker: WARNING: There are still undeleted objects:\n"));
#ifndef _KERNEL_MODE
                for (; trackable; trackable = fTrackables.GetNext(trackable)) {
                        WARN(("  trackable: %p: type: `%s'\n", trackable,
                                typeid(*trackable).name()));
                }
#endif
        }
}

// InitDefault
ObjectTracker*
ObjectTracker::InitDefault()
{
        if (!sTracker)
                sTracker = new(sTrackerBuffer) ObjectTracker;
        return sTracker;
}

// ExitDefault
void
ObjectTracker::ExitDefault()
{
        if (sTracker) {
                sTracker->~ObjectTracker();
                sTracker = NULL;
        }
}

// GetDefault
ObjectTracker*
ObjectTracker::GetDefault()
{
        return sTracker;
}

// AddTrackable
void
ObjectTracker::AddTrackable(ObjectTrackable* trackable)
{
        if (trackable) {
                AutoLocker<Locker> _(fLock);
                fTrackables.Insert(trackable);
        }
}

// RemoveTrackable
void
ObjectTracker::RemoveTrackable(ObjectTrackable* trackable)
{
        if (trackable) {
                AutoLocker<Locker> _(fLock);
                fTrackables.Remove(trackable);
        }
}

// sTracker
ObjectTracker* ObjectTracker::sTracker = NULL;