+ // If this block is not the scan block, we want to push it out and
+ // make room for a new todo block.
+ if (bd != ws->scan_bd)
+ {
+ // If this block does not have enough space to allocate the
+ // current object, but it also doesn't have any work to push, then
+ // push it on to the scanned list. It cannot be empty, because
+ // then there would be enough room to copy the current object.
+ if (bd->u.scan == bd->free)
+ {
+ ASSERT(bd->free != bd->start);
+ push_scanned_block(bd, ws);
+ }
+ // Otherwise, push this block out to the global list.
+ else
+ {
+ step *stp;
+ stp = ws->step;
+ trace(TRACE_gc|DEBUG_gc, "push todo block %p (%d words), step %d, n_todos: %d",
+ bd->start, bd->free - bd->u.scan, stp->abs_no, stp->n_todos);
+ // ToDo: use buffer_todo
+ ACQUIRE_SPIN_LOCK(&stp->sync_todo);
+ if (stp->todos_last == NULL) {
+ stp->todos_last = bd;
+ stp->todos = bd;
+ } else {
+ stp->todos_last->link = bd;
+ stp->todos_last = bd;
+ }
+ stp->n_todos++;
+ RELEASE_SPIN_LOCK(&stp->sync_todo);
+ }
+ }
+
+ ws->todo_bd = NULL;
+ ws->todo_free = NULL;
+ ws->todo_lim = NULL;