static void atomic (lua_State *L) {
global_State *g = G(L);
size_t udsize; /* total size of userdata to be finalized */
/* remark occasional upvalues of (maybe) dead threads */
remarkupvals(g);
/* traverse objects cautch by write barrier and by 'remarkupvals' */
propagateall(g);
/* remark weak tables */
g->gray = g->weak;
g->weak = NULL;
lua_assert(!iswhite(obj2gco(g->mainthread)));
markobject(g, L); /* mark running thread */
markmt(g); /* mark basic metatables (again) */
propagateall(g);
/* remark gray again */
g->gray = g->grayagain;
g->grayagain = NULL;
propagateall(g);
udsize = luaC_separateudata(L, 0); /* separate userdata to be finalized */
marktmu(g); /* mark `preserved' userdata */
udsize += propagateall(g); /* remark, to propagate `preserveness' */
cleartable(g->weak); /* remove collected objects from weak tables */
/* flip current white */
g->currentwhite = cast_byte(otherwhite(g));
g->sweepstrgc = 0;
g->sweepgc = &g->rootgc;
g->gcstate = GCSsweepstring;
g->estimate = g->totalbytes - udsize; /* first estimate */
}
static void atomic (lua_State *L) {
global_State *g = G(L);
GCObject *origweak, *origall;
lua_assert(!iswhite(obj2gco(g->mainthread)));
markobject(g, L); /* mark running thread */
/* registry and global metatables may be changed by API */
markvalue(g, &g->l_registry);
markmt(g); /* mark basic metatables */
/* remark occasional upvalues of (maybe) dead threads */
remarkupvals(g);
/* traverse objects caught by write barrier and by 'remarkupvals' */
retraversegrays(g);
convergeephemerons(g);
/* at this point, all strongly accessible objects are marked. */
/* clear values from weak tables, before checking finalizers */
clearvalues(g->weak, NULL);
clearvalues(g->allweak, NULL);
origweak = g->weak; origall = g->allweak;
separatetobefnz(L, 0); /* separate objects to be finalized */
markbeingfnz(g); /* mark userdata that will be finalized */
propagateall(g); /* remark, to propagate `preserveness' */
convergeephemerons(g);
/* at this point, all resurrected objects are marked. */
/* remove dead objects from weak tables */
clearkeys(g->ephemeron, NULL); /* clear keys from all ephemeron tables */
clearkeys(g->allweak, NULL); /* clear keys from all allweak tables */
/* clear values from resurrected weak tables */
clearvalues(g->weak, origweak);
clearvalues(g->allweak, origall);
g->sweepstrgc = 0; /* prepare to sweep strings */
g->gcstate = GCSsweepstring;
g->currentwhite = cast_byte(otherwhite(g)); /* flip current white */
/*lua_checkmemory(L);*/
}
/*
** mark root set and reset all gray lists, to start a new collection
*/
static void restartcollection (global_State *g) {
g->gray = g->grayagain = NULL;
g->weak = g->allweak = g->ephemeron = NULL;
markobject(g, g->mainthread);
markvalue(g, &g->l_registry);
markmt(g);
markbeingfnz(g); /* mark any finalizing object left from previous cycle */
}
/* mark root set */
static void markroot(lua_State *L) {
global_State *g = G(L);
g->gray = NULL;
g->grayagain = NULL;
g->weak = NULL;
markobject(g, g->mainthread);
/* make global table be traversed before main stack */markvalue(g, gt(g->mainthread));
markvalue(g, registry(L));
markmt(g);
g->gcstate = GCSpropagate;
}
/* mark root set */
static void markroot (lua_State *L) {
global_State *g = G(L);
g->gray = NULL;
g->grayagain = NULL;
g->weak = NULL;
markobject(g, g->mainthread);
/* make global table be traversed before main stack */
markvalue(g, gt(g->mainthread));
markvalue(g, registry(L));
#if LUA_FASTREF_SUPPORT
markvalue(g, &G(L)->l_refs);
#endif /* LUA_FASTREF_SUPPORT */
markmt(g);
g->gcstate = GCSpropagate;
}
/* mark root set */
static void markroot (lua_State *L) {
global_State *g = G(L);
g->gray = NULL;
g->grayagain = NULL;
g->weak = NULL;
markobject(g, g->mainthread);
/* make global table be traversed before main stack */
markvalue(g, gt(g->mainthread));
markvalue(g, registry(L));
markmt(g);
#if LUAPLUS_EXTENSIONS
if (G(L)->userGCFunction)
G(L)->userGCFunction(L);
#endif /* LUAPLUS_EXTENSIONS */
g->gcstate = GCSpropagate;
}
static l_mem atomic (lua_State *L) {
global_State *g = G(L);
l_mem work;
GCObject *origweak, *origall;
GCObject *grayagain = g->grayagain; /* save original list */
lua_assert(g->ephemeron == NULL && g->weak == NULL);
lua_assert(!iswhite(g->mainthread));
g->gcstate = GCSinsideatomic;
g->GCmemtrav = 0; /* start counting work */
markobject(g, L); /* mark running thread */
/* registry and global metatables may be changed by API */
markvalue(g, &g->l_registry);
markmt(g); /* mark global metatables */
/* remark occasional upvalues of (maybe) dead threads */
remarkupvals(g);
propagateall(g); /* propagate changes */
work = g->GCmemtrav; /* stop counting (do not recount 'grayagain') */
g->gray = grayagain;
propagateall(g); /* traverse 'grayagain' list */
g->GCmemtrav = 0; /* restart counting */
convergeephemerons(g);
/* at this point, all strongly accessible objects are marked. */
/* Clear values from weak tables, before checking finalizers */
clearvalues(g, g->weak, NULL);
clearvalues(g, g->allweak, NULL);
origweak = g->weak;
origall = g->allweak;
work += g->GCmemtrav; /* stop counting (objects being finalized) */
separatetobefnz(g, 0); /* separate objects to be finalized */
g->gcfinnum = 1; /* there may be objects to be finalized */
markbeingfnz(g); /* mark objects that will be finalized */
propagateall(g); /* remark, to propagate 'resurrection' */
g->GCmemtrav = 0; /* restart counting */
convergeephemerons(g);
/* at this point, all resurrected objects are marked. */
/* remove dead objects from weak tables */
clearkeys(g, g->ephemeron, NULL); /* clear keys from all ephemeron tables */
clearkeys(g, g->allweak, NULL); /* clear keys from all 'allweak' tables */
/* clear values from resurrected weak tables */
clearvalues(g, g->weak, origweak);
clearvalues(g, g->allweak, origall);
luaS_clearcache(g);
g->currentwhite = cast_byte(otherwhite(g)); /* flip current white */
work += g->GCmemtrav; /* complete counting */
return work; /* estimate of memory marked by 'atomic' */
}
static l_mem atomic (lua_State *L) {
global_State *g = G(L);
l_mem work = -cast(l_mem, g->GCmemtrav); /* start counting work */
GCObject *origweak, *origall;
lua_assert(!iswhite(obj2gco(g->mainthread)));
markobject(g, L); /* mark running thread */
/* registry and global metatables may be changed by API */
markvalue(g, &g->l_registry);
markmt(g); /* mark basic metatables */
/* remark occasional upvalues of (maybe) dead threads */
remarkupvals(g);
propagateall(g); /* propagate changes */
work += g->GCmemtrav; /* stop counting (do not (re)count grays) */
/* traverse objects caught by write barrier and by 'remarkupvals' */
retraversegrays(g);
work -= g->GCmemtrav; /* restart counting */
convergeephemerons(g);
/* at this point, all strongly accessible objects are marked. */
/* clear values from weak tables, before checking finalizers */
clearvalues(g, g->weak, NULL);
clearvalues(g, g->allweak, NULL);
origweak = g->weak; origall = g->allweak;
work += g->GCmemtrav; /* stop counting (objects being finalized) */
separatetobefnz(L, 0); /* separate objects to be finalized */
markbeingfnz(g); /* mark objects that will be finalized */
propagateall(g); /* remark, to propagate `preserveness' */
work -= g->GCmemtrav; /* restart counting */
convergeephemerons(g);
/* at this point, all resurrected objects are marked. */
/* remove dead objects from weak tables */
clearkeys(g, g->ephemeron, NULL); /* clear keys from all ephemeron tables */
clearkeys(g, g->allweak, NULL); /* clear keys from all allweak tables */
/* clear values from resurrected weak tables */
clearvalues(g, g->weak, origweak);
clearvalues(g, g->allweak, origall);
g->currentwhite = cast_byte(otherwhite(g)); /* flip current white */
work += g->GCmemtrav; /* complete counting */
return work; /* estimate of memory marked by 'atomic' */
}