| 375 | |
| 376 | |
| 377 | static int traverseephemeron (global_State *g, Table *h) { |
| 378 | int marked = 0; /* true if an object is marked in this traversal */ |
| 379 | int hasclears = 0; /* true if table has white keys */ |
| 380 | int prop = 0; /* true if table has entry "white-key -> white-value" */ |
| 381 | Node *n, *limit = gnodelast(h); |
| 382 | int i; |
| 383 | /* traverse array part (numeric keys are 'strong') */ |
| 384 | for (i = 0; i < h->sizearray; i++) { |
| 385 | if (valiswhite(&h->array[i])) { |
| 386 | marked = 1; |
| 387 | reallymarkobject(g, gcvalue(&h->array[i])); |
| 388 | } |
| 389 | } |
| 390 | /* traverse hash part */ |
| 391 | for (n = gnode(h, 0); n < limit; n++) { |
| 392 | checkdeadkey(n); |
| 393 | if (ttisnil(gval(n))) /* entry is empty? */ |
| 394 | removeentry(n); /* remove it */ |
| 395 | else if (iscleared(g, gkey(n))) { /* key is not marked (yet)? */ |
| 396 | hasclears = 1; /* table must be cleared */ |
| 397 | if (valiswhite(gval(n))) /* value not marked yet? */ |
| 398 | prop = 1; /* must propagate again */ |
| 399 | } |
| 400 | else if (valiswhite(gval(n))) { /* value not marked yet? */ |
| 401 | marked = 1; |
| 402 | reallymarkobject(g, gcvalue(gval(n))); /* mark it now */ |
| 403 | } |
| 404 | } |
| 405 | if (g->gcstate != GCSatomic || prop) |
| 406 | linktable(h, &g->ephemeron); /* have to propagate again */ |
| 407 | else if (hasclears) /* does table have white keys? */ |
| 408 | linktable(h, &g->allweak); /* may have to clean white keys */ |
| 409 | else /* no white keys */ |
| 410 | linktable(h, &g->grayagain); /* no need to clean */ |
| 411 | return marked; |
| 412 | } |
| 413 | |
| 414 | |
| 415 | static void traversestrongtable (global_State *g, Table *h) { |
no test coverage detected