Method Decref

extern/re2/re2/regexp.cc:116–132

Decrements reference count and deletes this object if count reaches 0.

// Decrements reference count and deletes this object if count reaches 0.
void Regexp::Decref() {
  if (ref_ == kMaxRef) {
    // Ref count is stored in overflow map.
    MutexLock l(ref_mutex);
    int r = (*ref_map)[this] - 1;
    if (r < kMaxRef) {
      ref_ = static_cast<uint16_t>(r);
      ref_map->erase(this);
    } else {
      (*ref_map)[this] = r;
    }
    return;
  }
  ref_--;
  if (ref_ == 0)
    Destroy();
}

// Deletes this object; ref count has count reached 0.
void Regexp::Destroy() {