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`grayagain' list

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This commit is contained in:
Roberto Ierusalimschy 2003-12-04 16:52:23 -02:00
parent 9db1942bac
commit fe595a45c2
3 changed files with 19 additions and 3 deletions
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16
lgc.c
View File

@ -1,5 +1,5 @@
/*
** $Id: lgc.c,v 1.184 2003/12/03 20:03:07 roberto Exp roberto $
** $Id: lgc.c,v 1.185 2003/12/04 17:22:42 roberto Exp roberto $
** Garbage Collector
** See Copyright Notice in lua.h
*/
@ -38,6 +38,7 @@
#define isgray(x) (!isblack(x) && !iswhite(x))
#define white2gray(x) reset2bits((x)->gch.marked, WHITE0BIT, WHITE1BIT)
#define black2gray(x) resetbit((x)->gch.marked, BLACKBIT)
#define stringmark(s) reset2bits((s)->tsv.marked, WHITE0BIT, WHITE1BIT)
@ -323,6 +324,9 @@ static l_mem propagatemarks (global_State *g, l_mem lim) {
case LUA_TTHREAD: {
lua_State *th = gcototh(o);
g->gray = th->gclist;
th->gclist = g->grayagain;
g->grayagain = o;
black2gray(o);
traversestack(g, th);
break;
}
@ -335,6 +339,11 @@ static l_mem propagatemarks (global_State *g, l_mem lim) {
case LUA_TUPVAL: {
UpVal *uv = gcotouv(o);
g->gray = uv->gclist;
if (uv->v != &uv->value) { /* open? */
uv->gclist = g->grayagain;
g->grayagain = o;
black2gray(o);
}
markvalue(g, &uv->value);
break;
}
@ -553,6 +562,10 @@ static void markroot (lua_State *L) {
static void atomic (lua_State *L) {
global_State *g = G(L);
lua_assert(g->gray == NULL);
g->gray = g->grayagain;
g->grayagain = NULL;
propagatemarks(g, MAXLMEM);
g->GCthreshold = luaC_separateudata(L); /* separate userdata to be preserved */
marktmu(g); /* mark `preserved' userdata */
propagatemarks(g, MAXLMEM); /* remark, to propagate `preserveness' */
@ -565,6 +578,7 @@ static void atomic (lua_State *L) {
g->sweepgc = &g->rootgc->gch.next;
g->sweepstrgc = 0;
g->gcstate = GCSsweepstring;
g->grayagain = NULL;
}

3
lstate.c
View File

@ -1,5 +1,5 @@
/*
** $Id: lstate.c,v 1.132 2003/12/03 20:03:07 roberto Exp roberto $
** $Id: lstate.c,v 1.133 2003/12/04 17:22:42 roberto Exp roberto $
** Global State
** See Copyright Notice in lua.h
*/
@ -172,6 +172,7 @@ LUA_API lua_State *lua_newstate (lua_Alloc f, void *ud) {
g->currentwhite = bitmask(WHITE0BIT);
g->firstudata = NULL;
g->gray = NULL;
g->grayagain = NULL;
g->weak = NULL;
g->tmudata = NULL;
setnilvalue(gkey(g->dummynode));

3
lstate.h
View File

@ -1,5 +1,5 @@
/*
** $Id: lstate.h,v 1.117 2003/12/03 20:03:07 roberto Exp roberto $
** $Id: lstate.h,v 1.118 2003/12/04 17:22:42 roberto Exp roberto $
** Global State
** See Copyright Notice in lua.h
*/
@ -103,6 +103,7 @@ typedef struct global_State {
GCObject **sweepgc; /* position of sweep in `rootgc' */
int sweepstrgc; /* position of sweep in `strt' */
GCObject *gray; /* list of gray objects */
GCObject *grayagain; /* list of objects to be traversed atomically */
GCObject *weak; /* list of weak tables (to be cleared) */
GCObject *tmudata; /* list of userdata to be GC */
int gcstate; /* state of garbage collector */