+ alloc_todo_block(ws, size);
+
+ p = ws->todo_free;
+ ws->todo_free += size;
+ return p;
+}
+
+StgPtr
+alloc_todo_block (step_workspace *ws, nat size)
+{
+ bdescr *bd/*, *hd, *tl */;
+
+ // Grab a part block if we have one, and it has enough room
+ bd = ws->part_list;
+ if (bd != NULL &&
+ bd->start + bd->blocks * BLOCK_SIZE_W - bd->free > (int)size)
+ {
+ ws->part_list = bd->link;
+ ws->n_part_blocks -= bd->blocks;
+ }
+ else
+ {
+ // blocks in to-space get the BF_EVACUATED flag.
+
+// allocBlocks_sync(16, &hd, &tl,
+// ws->step->gen_no, ws->step, BF_EVACUATED);
+//
+// tl->link = ws->part_list;
+// ws->part_list = hd->link;
+// ws->n_part_blocks += 15;
+//
+// bd = hd;
+
+ if (size > BLOCK_SIZE_W) {
+ bd = allocGroup_sync((lnat)BLOCK_ROUND_UP(size*sizeof(W_))
+ / BLOCK_SIZE);
+ } else {
+ bd = allocBlock_sync();
+ }
+ initBdescr(bd, ws->step);
+ bd->flags = BF_EVACUATED;
+ bd->u.scan = bd->free = bd->start;
+ }
+
+ bd->link = NULL;
+
+ ws->todo_bd = bd;
+ ws->todo_free = bd->free;
+ ws->todo_lim = stg_min(bd->start + bd->blocks * BLOCK_SIZE_W,
+ bd->free + stg_max(WORK_UNIT_WORDS,size));
+
+ debugTrace(DEBUG_gc, "alloc new todo block %p for step %d",
+ bd->free, ws->step->abs_no);
+
+ return ws->todo_free;