lgc.h File Reference

#include "lobject.h"
#include "lstate.h"

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Macros
#define	GCSTEPSIZE   (cast_int(100 * sizeof(TString)))
#define	GCSpropagate   0
#define	GCSatomic   1
#define	GCSswpallgc   2
#define	GCSswpfinobj   3
#define	GCSswptobefnz   4
#define	GCSswpend   5
#define	GCScallfin   6
#define	GCSpause   7
#define	issweepphase(g)   (GCSswpallgc <= (g)->gcstate && (g)->gcstate <= GCSswpend)
#define	keepinvariant(g)   ((g)->gcstate <= GCSatomic)
#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	WHITE0BIT   0 /* object is white (type 0) */
#define	WHITE1BIT   1 /* object is white (type 1) */
#define	BLACKBIT   2 /* object is black */
#define	FINALIZEDBIT   3 /* object has been marked for finalization */
#define	WHITEBITS   bit2mask(WHITE0BIT, WHITE1BIT)
#define	iswhite(x)   testbits((x)->marked, WHITEBITS)
#define	isblack(x)   testbit((x)->marked, BLACKBIT)
#define	isgray(x)
#define	tofinalize(x)   testbit((x)->marked, FINALIZEDBIT)
#define	otherwhite(g)   ((g)->currentwhite ^ WHITEBITS)
#define	isdeadm(ow, m)   (!(((m) ^ WHITEBITS) & (ow)))
#define	isdead(g, v)   isdeadm(otherwhite(g), (v)->marked)
#define	changewhite(x)   ((x)->marked ^= WHITEBITS)
#define	gray2black(x)   l_setbit((x)->marked, BLACKBIT)
#define	luaC_white(g)   cast(lu_byte, (g)->currentwhite & WHITEBITS)
#define	luaC_condGC(L, pre, pos)
#define	luaC_checkGC(L)   luaC_condGC(L,(void)0,(void)0)
#define	luaC_barrier(L, p, v)
#define	luaC_barrierback(L, p, v)
#define	luaC_objbarrier(L, p, o)
#define	luaC_upvalbarrier(L, uv)

Functions
LUAI_FUNC void	luaC_fix (lua_State *L, GCObject *o)
LUAI_FUNC void	luaC_freeallobjects (lua_State *L)
LUAI_FUNC void	luaC_step (lua_State *L)
LUAI_FUNC void	luaC_runtilstate (lua_State *L, int statesmask)
LUAI_FUNC void	luaC_fullgc (lua_State *L, int isemergency)
LUAI_FUNC GCObject *	luaC_newobj (lua_State *L, int tt, size_t sz)
LUAI_FUNC void	luaC_barrier_ (lua_State *L, GCObject *o, GCObject *v)
LUAI_FUNC void	luaC_barrierback_ (lua_State *L, Table *o)
LUAI_FUNC void	luaC_upvalbarrier_ (lua_State *L, UpVal *uv)
LUAI_FUNC void	luaC_checkfinalizer (lua_State *L, GCObject *o, Table *mt)
LUAI_FUNC void	luaC_upvdeccount (lua_State *L, UpVal *uv)

Macro Definition Documentation

bit2mask

#define bit2mask	(		b1,
			b2
	)		(bitmask(b1) | bitmask(b2))

bitmask

#define bitmask

(

b

)

(1<<(b))

BLACKBIT

#define BLACKBIT   2 /* object is black */

changewhite

#define changewhite

(

x

)

((x)->marked ^= WHITEBITS)

FINALIZEDBIT

#define FINALIZEDBIT   3 /* object has been marked for finalization */

GCSatomic

#define GCSatomic   1

GCScallfin

#define GCScallfin   6

GCSpause

#define GCSpause   7

GCSpropagate

#define GCSpropagate   0

GCSswpallgc

#define GCSswpallgc   2

GCSswpend

#define GCSswpend   5

GCSswpfinobj

#define GCSswpfinobj   3

GCSswptobefnz

#define GCSswptobefnz   4

GCSTEPSIZE

#define GCSTEPSIZE   (cast_int(100 * sizeof(TString)))

gray2black

#define gray2black

(

x

)

l_setbit((x)->marked, BLACKBIT)

isblack

#define isblack

(

x

)

testbit((x)->marked, BLACKBIT)

isdead

#define isdead	(		g,
			v
	)		isdeadm(otherwhite(g), (v)->marked)

isdeadm

#define isdeadm	(		ow,
			m
	)		(!(((m) ^ WHITEBITS) & (ow)))

isgray

#define isgray

(

x

)

Value:

/* neither white nor black */  \
    (!testbits((x)->marked, WHITEBITS | bitmask(BLACKBIT)))

issweepphase

#define issweepphase

(

g

)

(GCSswpallgc <= (g)->gcstate && (g)->gcstate <= GCSswpend)

iswhite

#define iswhite

(

x

)

testbits((x)->marked, WHITEBITS)

keepinvariant

#define keepinvariant

(

g

)

((g)->gcstate <= GCSatomic)

l_setbit

#define l_setbit	(		x,
			b
	)		setbits(x, bitmask(b))

luaC_barrier

#define luaC_barrier	(		L,
			p,
			v
	)

Value:

(  \
    (iscollectable(v) && isblack(p) && iswhite(gcvalue(v))) ?  \
    luaC_barrier_(L,obj2gco(p),gcvalue(v)) : cast_void(0))

luaC_barrierback

#define luaC_barrierback	(		L,
			p,
			v
	)

Value:

(  \
    (iscollectable(v) && isblack(p) && iswhite(gcvalue(v))) ? \
    luaC_barrierback_(L,p) : cast_void(0))

luaC_checkGC

#define luaC_checkGC

(

L

)

luaC_condGC(L,(void)0,(void)0)

luaC_condGC

#define luaC_condGC	(		L,
			pre,
			pos
	)

Value:

{ if (G(L)->GCdebt > 0) { pre; luaC_step(L); pos;}; \
      condchangemem(L,pre,pos); }

luaC_objbarrier

#define luaC_objbarrier	(		L,
			p,
			o
	)

Value:

(  \
    (isblack(p) && iswhite(o)) ? \
    luaC_barrier_(L,obj2gco(p),obj2gco(o)) : cast_void(0))

luaC_upvalbarrier

#define luaC_upvalbarrier	(		L,
			uv
	)

Value:

( \
    (iscollectable((uv)->v) && !upisopen(uv)) ? \
         luaC_upvalbarrier_(L,uv) : cast_void(0))

luaC_white

#define luaC_white

(

g

)

cast(lu_byte, (g)->currentwhite & WHITEBITS)

otherwhite

#define otherwhite

(

g

)

((g)->currentwhite ^ WHITEBITS)

resetbit

#define resetbit	(		x,
			b
	)		resetbits(x, bitmask(b))

resetbits

#define resetbits	(		x,
			m
	)		((x) &= cast(lu_byte, ~(m)))

setbits

#define setbits	(		x,
			m
	)		((x) |= (m))

testbit

#define testbit	(		x,
			b
	)		testbits(x, bitmask(b))

testbits

#define testbits	(		x,
			m
	)		((x) & (m))

tofinalize

#define tofinalize

(

x

)

testbit((x)->marked, FINALIZEDBIT)

WHITE0BIT

#define WHITE0BIT   0 /* object is white (type 0) */

WHITE1BIT

#define WHITE1BIT   1 /* object is white (type 1) */

WHITEBITS

#define WHITEBITS   bit2mask(WHITE0BIT, WHITE1BIT)

Function Documentation

luaC_barrier_()

LUAI_FUNC void luaC_barrier_	(	lua_State *	L,
		GCObject *	o,
		GCObject *	v
	)

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luaC_barrierback_()

LUAI_FUNC void luaC_barrierback_	(	lua_State *	L,
		Table *	o
	)

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luaC_checkfinalizer()

LUAI_FUNC void luaC_checkfinalizer	(	lua_State *	L,
		GCObject *	o,
		Table *	mt
	)

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luaC_fix()

LUAI_FUNC void luaC_fix	(	lua_State *	L,
		GCObject *	o
	)

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luaC_freeallobjects()

LUAI_FUNC void luaC_freeallobjects

(

lua_State *

L

)

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luaC_fullgc()

LUAI_FUNC void luaC_fullgc	(	lua_State *	L,
		int	isemergency
	)

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luaC_newobj()

LUAI_FUNC GCObject* luaC_newobj	(	lua_State *	L,
		int	tt,
		size_t	sz
	)

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luaC_runtilstate()

LUAI_FUNC void luaC_runtilstate	(	lua_State *	L,
		int	statesmask
	)

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luaC_step()

LUAI_FUNC void luaC_step

(

lua_State *

L

)

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luaC_upvalbarrier_()

LUAI_FUNC void luaC_upvalbarrier_	(	lua_State *	L,
		UpVal *	uv
	)

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luaC_upvdeccount()

LUAI_FUNC void luaC_upvdeccount	(	lua_State *	L,
		UpVal *	uv
	)

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