// Copyright (C) 2015 Jérôme Leclercq
// This file is part of the "Nazara Engine - Core module"
// For conditions of distribution and use, see copyright notice in Config.hpp

#include <Nazara/Core/RefCounted.hpp>
#include <Nazara/Core/Config.hpp>
#include <Nazara/Core/Error.hpp>

#if NAZARA_CORE_THREADSAFE && NAZARA_THREADSAFETY_REFCOUNTED
	#include <Nazara/Core/ThreadSafety.hpp>
#else
	#include <Nazara/Core/ThreadSafetyOff.hpp>
#endif

#include <Nazara/Core/Debug.hpp>

NzRefCounted::NzRefCounted(bool persistent) :
m_persistent(persistent),
m_referenceCount(0)
{
}

NzRefCounted::~NzRefCounted()
{
	#if NAZARA_CORE_SAFE
	if (m_referenceCount > 0)
		NazaraWarning("Resource destroyed while still referenced " + NzString::Number(m_referenceCount) + " time(s)");
	#endif
}

void NzRefCounted::AddReference() const
{
	m_referenceCount++;
}

unsigned int NzRefCounted::GetReferenceCount() const
{
	return m_referenceCount;
}

bool NzRefCounted::IsPersistent() const
{
	return m_persistent;
}

bool NzRefCounted::RemoveReference() const
{
	#if NAZARA_CORE_SAFE
	if (m_referenceCount == 0)
	{
		NazaraError("Impossible to remove reference (Ref. counter is already 0)");
		return false;
	}
	#endif

	if (--m_referenceCount == 0 && !m_persistent)
	{
		delete this; // Suicide

		return true;
	}
	else
		return false;
}

bool NzRefCounted::SetPersistent(bool persistent, bool checkReferenceCount)
{
	m_persistent = persistent;

	if (checkReferenceCount && !persistent && m_referenceCount == 0)
	{
		delete this;

		return true;
	}
	else
		return false;
}