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);*/
}
static l_mem atomic (lua_State *L) {
global_State *g = G(L);
l_mem work;
GCObject *origweak, *origall;
g->GCmemtrav = 0; /* start counting work */
lua_assert(!iswhite(obj2gco(g->mainthread)));
g->gcstate = GCSinsideatomic;
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);
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);
g->currentwhite = cast_byte(otherwhite(g)); /* flip current white */
work += g->GCmemtrav; /* complete counting */
return work; /* estimate of memory marked by 'atomic' */
}
