public static UpVal luaF_findupval(lua_State L, StkId level)
{
global_State g = G(L);
GCObjectRef pp = new OpenValRef(L);
UpVal p;
UpVal uv;
while (pp.get() != null && (p = ngcotouv(pp.get())).v >= level)
{
lua_assert(p.v != p.u.value);
if (p.v == level)
{ /* found a corresponding upvalue? */
if (isdead(g, obj2gco(p))) /* is it dead? */
{
changewhite(obj2gco(p)); /* ressurect it */
}
return(p);
}
pp = new NextRef(p);
}
uv = luaM_new <UpVal>(L); /* not found: create a new one */
uv.tt = LUA_TUPVAL;
uv.marked = luaC_white(g);
uv.v = level; /* current value lives in the stack */
uv.next = pp.get(); /* chain it in the proper position */
pp.set(obj2gco(uv));
uv.u.l.prev = g.uvhead; /* double link it in `uvhead' list */
uv.u.l.next = g.uvhead.u.l.next;
uv.u.l.next.u.l.prev = uv;
g.uvhead.u.l.next = uv;
lua_assert(uv.u.l.next.u.l.prev == uv && uv.u.l.prev.u.l.next == uv);
return(uv);
}
/* move 'dead' udata that need finalization to list 'tobefnz' */
public static uint luaC_separateudata(lua_State L, int all)
{
global_State g = G(L);
uint deadmem = 0; /* total size of all objects to be finalized */
GCObjectRef p = new NextRef(g.mainthread);
GCObject curr;
GCObjectRef lastnext = new TobefnzRef(g); //FIXME:??????
/* find last 'next' field in 'tobefnz' list (to insert elements in its end) */
while (lastnext.get() != null)
{
lastnext = new NextRef(gch(lastnext.get()));
}
while ((curr = p.get()) != null) /* traverse all finalizable objects */
{
lua_assert(ttisuserdata(gch(curr)) && !isfinalized(gco2u(curr)));
lua_assert(testbit(gch(curr).marked, SEPARATED));
if (!(all != 0 || iswhite(curr))) /* not being collected? */
{
p = new NextRef(gch(curr)); /* don't bother with it */
}
else
{
l_setbit(ref gch(curr).marked, FINALIZEDBIT); /* won't be finalized again */
deadmem += sizeudata(gco2u(curr));
p.set(gch(curr).next); /* remove 'curr' from 'rootgc' list */
/* link 'curr' at the end of 'tobefnz' list */
gch(curr).next = lastnext.get();
lastnext.set(curr);
lastnext = new NextRef(gch(curr));
}
}
return(deadmem);
}
public static UpVal luaF_findupval(lua_State L, StkId level)
{
global_State g = G(L);
GCObjectRef pp = new OpenValRef(L);
UpVal p;
UpVal uv;
while (pp.get() != null && (p = ngcotouv(pp.get())).v >= level) {
lua_assert(p.v != p.u.value);
if (p.v == level) { /* found a corresponding upvalue? */
if (isdead(g, obj2gco(p))) /* is it dead? */
changewhite(obj2gco(p)); /* ressurect it */
return p;
}
pp = new NextRef(p);
}
uv = luaM_new<UpVal>(L); /* not found: create a new one */
uv.tt = LUA_TUPVAL;
uv.marked = luaC_white(g);
uv.v = level; /* current value lives in the stack */
uv.next = pp.get(); /* chain it in the proper position */
pp.set( obj2gco(uv) );
uv.u.l.prev = g.uvhead; /* double link it in `uvhead' list */
uv.u.l.next = g.uvhead.u.l.next;
uv.u.l.next.u.l.prev = uv;
g.uvhead.u.l.next = uv;
lua_assert(uv.u.l.next.u.l.prev == uv && uv.u.l.prev.u.l.next == uv);
return uv;
}
/*
** move all unreachable objects that need finalization from list 'finobj'
** to list 'tobefnz'
*/
public static void luaC_separateudata(lua_State L, int all)
{
global_State g = G(L);
GCObjectRef p = new FinobjRef(g);
GCObject curr;
GCObjectRef lastnext = new TobefnzRef(g); //FIXME:??????next???
/* find last 'next' field in 'tobefnz' list (to add elements in its end) */
while (lastnext.get() != null)
{
lastnext = new NextRef(gch(lastnext.get())); //FIXME:next???PtrRef???
}
while ((curr = p.get()) != null) /* traverse all finalizable objects */
{
lua_assert(!isfinalized(curr));
lua_assert(testbit(gch(curr).marked, SEPARATED));
if (!(all != 0 || iswhite(curr))) /* not being collected? */
{
p = new NextRef(gch(curr)); /* don't bother with it */
}
else
{
l_setbit(ref gch(curr).marked, FINALIZEDBIT); /* won't be finalized again */
p.set(gch(curr).next); /* remove 'curr' from 'finobj' list */
gch(curr).next = lastnext.get(); /* link at the end of 'tobefnz' list */
lastnext.set(curr);
lastnext = new NextRef(gch(curr));
}
}
}
/* move `dead' udata that need finalization to list `tmudata' */
public static uint luaC_separateudata(lua_State L, int all)
{
global_State g = G(L);
uint deadmem = 0;
GCObjectRef p = new NextRef(g.mainthread);
GCObject curr;
while ((curr = p.get()) != null)
{
if (!(iswhite(curr) || (all != 0)) || isfinalized(gco2u(curr)))
{
p = new NextRef(curr.gch); /* don't bother with them */
}
else if (fasttm(L, gco2u(curr).metatable, TMS.TM_GC) == null)
{
markfinalized(gco2u(curr)); /* don't need finalization */
p = new NextRef(curr.gch);
}
else /* must call its gc method */
{
deadmem += (uint)sizeudata(gco2u(curr));
markfinalized(gco2u(curr));
p.set(curr.gch.next);
/* link `curr' at the end of `tmudata' list */
if (g.tmudata == null) /* list is empty? */
{
g.tmudata = curr.gch.next = curr; /* creates a circular list */
}
else
{
curr.gch.next = g.tmudata.gch.next;
g.tmudata.gch.next = curr;
g.tmudata = curr;
}
}
}
return(deadmem);
}
/* move `dead' udata that need finalization to list `tmudata' */
public static uint luaC_separateudata(lua_State L, int all)
{
global_State g = G(L);
uint deadmem = 0;
GCObjectRef p = new NextRef(g.mainthread);
GCObject curr;
while ((curr = p.get()) != null) {
if (!(iswhite(curr) || (all!=0)) || isfinalized(gco2u(curr)))
p = new NextRef(curr.gch); /* don't bother with them */
else if (fasttm(L, gco2u(curr).metatable, TMS.TM_GC) == null) {
markfinalized(gco2u(curr)); /* don't need finalization */
p = new NextRef(curr.gch);
}
else { /* must call its gc method */
deadmem += (uint)sizeudata(gco2u(curr));
markfinalized(gco2u(curr));
p.set( curr.gch.next );
/* link `curr' at the end of `tmudata' list */
if (g.tmudata == null) /* list is empty? */
g.tmudata = curr.gch.next = curr; /* creates a circular list */
else {
curr.gch.next = g.tmudata.gch.next;
g.tmudata.gch.next = curr;
g.tmudata = curr;
}
}
}
return deadmem;
}
