Method acquire

plugins/background_fetch/background_fetch.cc:96–113

  }

  bool
  acquire(const std::string &url)
  {
    bool ret;

    TSMutexLock(_lock);
    if (_urls.end() == _urls.find(url)) {
      _urls[url] = true;
      ret        = true;
    } else {
      ret = false;
    }
    TSMutexUnlock(_lock);

    Dbg(Bg_dbg_ctl, "BgFetchState.acquire(): ret = %d, url = %s", ret, url.c_str());

    return ret;
  }

  bool
  release(const std::string &url)