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/*
** $Id: lgc.h,v 2.15.1.1 2007/12/27 13:02:25 roberto Exp $
** Garbage Collector
** See Copyright Notice in lua.h
*/

#ifndef lgc_h
#define lgc_h


#include "lobject.h"


/*
** Possible states of the Garbage Collector
*/
#define GCSpause	0
#define GCSpropagate	1
#define GCSsweepstring	2
#define GCSsweep	3
#define GCSfinalize	4


/*
** some userful bit tricks
*/
#define resetbits(x,m)	((x) &= cast(lu_byte, ~(m)))
#define setbits(x,m)	((x) |= (m))
#define testbits(x,m)	((x) & (m))
#define bitmask(b)	(1<<(b))
#define bit2mask(b1,b2)	(bitmask(b1) | bitmask(b2))
#define l_setbit(x,b)	setbits(x, bitmask(b))
#define resetbit(x,b)	resetbits(x, bitmask(b))
#define testbit(x,b)	testbits(x, bitmask(b))
#define set2bits(x,b1,b2)	setbits(x, (bit2mask(b1, b2)))
#define reset2bits(x,b1,b2)	resetbits(x, (bit2mask(b1, b2)))