Method reset_memory

library/src/trans_table/trans_table_l.cpp:387–443

auto TransTableL::reset_memory(
  [[maybe_unused]] const ResetReason reason) -> void
{
  if (pool_ == nullptr)
    return;

  // Temporary debug: observe reset parameters to diagnose crashes
  #if defined(DDS_DEBUG_TT_RESET)
    std::fprintf(stderr,
                 "[TransTableL::reset_memory] reason=%d current=%d default=%d pool=%p\n",
                 static_cast<int>(reason),
                 pages_current_,
                 pages_default_,
                 static_cast<void*>(pool_));
  #endif

  page_stats_.num_resets_++;
  page_stats_.num_callocs_ += pages_current_ - page_stats_.last_current_;
  page_stats_.last_current_ = pages_current_;

  while (pages_current_ > pages_default_) {
    // Free the tail-most pool and unlink safely even if it was the only one.
    Pool* cur = pool_;
    free(cur->list_);
    pool_ = cur->prev_;
    free(cur);
    if (pool_ != nullptr) {
      pool_->next_ = nullptr;
    }

    pages_current_--;
  }

  page_stats_.num_frees_ += page_stats_.last_current_ - pages_current_;
  page_stats_.last_current_ = pages_current_;

  if (pool_ != nullptr) {
    while (pool_->prev_)
      pool_ = pool_->prev_;
  }

  if (pool_ != nullptr) {
    pool_->next_block_no_ = 0;
    next_block_ = pool_->list_;
  }
  else {
    // No pool => future allocations will create a fresh pool on demand
    next_block_ = nullptr;
  }

  TransTableL::init_tt();

  timestamp_ = 0;

  mem_state_ = MemState::FROM_POOL;

}