Method updateNumSlabsToAdvise

cachelib/allocator/MemoryMonitor.cpp:82–95

}

void MemoryMonitor::updateNumSlabsToAdvise(int32_t numSlabs) {
  auto curNumSlabsToAdvise = numSlabsToAdvise_.load(std::memory_order_acquire);
  size_t newNumSlabsToAdvise;
  do {
    newNumSlabsToAdvise = curNumSlabsToAdvise + numSlabs;
    if (numSlabs < 0 &&
        static_cast<uint64_t>(-numSlabs) > curNumSlabsToAdvise) {
      throw std::invalid_argument(
          fmt::format("Invalid numSlabs {} to update numSlabsToAdvise {}",
                      numSlabs, curNumSlabsToAdvise));
    }
  } while (!numSlabsToAdvise_.compare_exchange_weak(
      curNumSlabsToAdvise, newNumSlabsToAdvise, std::memory_order_acq_rel));
}

void MemoryMonitor::checkFreeMemory() {
  auto memFree = facebook::cachelib::util::getMemAvailable();