/*	see copyright notice in squirrel.h */
#ifndef _SQUSERDATA_H_
#define _SQUSERDATA_H_

struct SQUserData : SQDelegable
{
	SQUserData(SQSharedState *ss){ _delegate = 0; _hook = NULL; INIT_CHAIN(); ADD_TO_CHAIN(&_ss(this)->_gc_chain, this); }
	~SQUserData()
	{
		REMOVE_FROM_CHAIN(&_ss(this)->_gc_chain, this);
		SetDelegate(NULL);
	}
	static SQUserData* Create(SQSharedState *ss, SQInteger size)
	{
		SQUserData* ud = (SQUserData*)SQ_MALLOC(sq_aligning(sizeof(SQUserData))+size);
		new (ud) SQUserData(ss);
		ud->_size = size;
		ud->_typetag = 0;
		return ud;
	}
#ifndef NO_GARBAGE_COLLECTOR
	void Mark(SQCollectable **chain);
	void Finalize(){SetDelegate(NULL);}
	SQObjectType GetType(){ return OT_USERDATA;}
#endif
	void Release() {
		if (_hook) _hook((SQUserPointer)sq_aligning(this + 1),_size);
		SQInteger tsize = _size;
		this->~SQUserData();
		SQ_FREE(this, sq_aligning(sizeof(SQUserData)) + tsize);
	}


	SQInteger _size;
	SQRELEASEHOOK _hook;
	SQUserPointer _typetag;
	//SQChar _val[1];
};

#endif
