| 153 | } |
| 154 | |
| 155 | void GcsDnsCache::WorkerThread() { |
| 156 | while (true) { |
| 157 | { |
| 158 | // Don't immediately re-resolve the addresses. |
| 159 | mutex_lock l(mu_); |
| 160 | if (cancelled_) return; |
| 161 | cond_var_.wait_for(l, std::chrono::seconds(refresh_rate_secs_)); |
| 162 | if (cancelled_) return; |
| 163 | } |
| 164 | |
| 165 | // Resolve DNS values |
| 166 | auto new_addresses = ResolveNames(kCachedDomainNames); |
| 167 | |
| 168 | { |
| 169 | mutex_lock l(mu_); |
| 170 | // Update instance variables. |
| 171 | addresses_.swap(new_addresses); |
| 172 | } |
| 173 | } |
| 174 | } |
| 175 | |
| 176 | } // namespace tensorflow |