| 321 | : detectIncrease_(detectIncrease) {} |
| 322 | |
| 323 | void RateLimiter::addValue(int64_t value) { |
| 324 | if (windowSize_ < 2) { |
| 325 | // Window size not large enough to calculate rate of change. |
| 326 | // This effectively disables rate limiting. |
| 327 | return; |
| 328 | } |
| 329 | values_.push_back(value); |
| 330 | auto prevValue = values_.front(); |
| 331 | // We may remove multiple values if window size shrinks |
| 332 | while (values_.size() > windowSize_) { |
| 333 | values_.pop_front(); |
| 334 | } |
| 335 | if (detectIncrease_) { |
| 336 | rateOfChange_ = (value - prevValue) / static_cast<int64_t>(windowSize_); |
| 337 | } else { |
| 338 | rateOfChange_ = (prevValue - value) / static_cast<int64_t>(windowSize_); |
| 339 | } |
| 340 | } |
| 341 | |
| 342 | size_t RateLimiter::throttle(int64_t delta) { |
| 343 | if (rateOfChange_ < 0 || windowSize_ < 2) { |