factor/vm/aging_space.hpp

namespace factor {

struct aging_space : bump_allocator<object> {
  object_start_map starts;

  aging_space(cell size, cell start)
      : bump_allocator<object>(size, start), starts(size, start) {}

  object* allot(cell size) {
    if (here + size > end)
      return NULL;

    object* obj = bump_allocator<object>::allot(size);
    starts.record_object_start_offset(obj);
    return obj;
  }

  cell next_object_after(cell scan) {
    cell size = ((object*)scan)->size();
    if (scan + size < here)
      return scan + size;
    else
      return 0;
  }

  cell first_object() {
    if (start != here)
      return start;
    else
      return 0;
  }
};

}