-class PerPageCopy {
- PageStore* store_;
- std::vector<std::size_t> pagenos_;
-public:
- PerPageCopy() : store_(nullptr) {}
- PerPageCopy(PerPageCopy const& that)
- {
- store_ = that.store_;
- pagenos_ = that.pagenos_;
- for (std::size_t pageno : pagenos_)
- store_->ref_page(pageno);
- }
- void clear()
- {
- for (std::size_t pageno : pagenos_)
- store_->unref_page(pageno);
- pagenos_.clear();
- }
- ~PerPageCopy() {
- clear();
- }
-
- PerPageCopy(PerPageCopy&& that)
- {
- store_ = that.store_;
- that.store_ = nullptr;
- pagenos_ = std::move(that.pagenos_);
- that.pagenos_.clear();
- }
- PerPageCopy& operator=(PerPageCopy const& that)
- {
- this->clear();
- store_ = that.store_;
- pagenos_ = that.pagenos_;
- for (std::size_t pageno : pagenos_)
- store_->ref_page(pageno);
- return *this;
- }
- PerPageCopy& operator=(PerPageCopy && that)
- {
- this->clear();
- store_ = that.store_;
- that.store_ = nullptr;
- pagenos_ = std::move(that.pagenos_);
- that.pagenos_.clear();
- return *this;
- }
-
- std::size_t page_count() const
- {
- return pagenos_.size();
- }
-
- std::size_t pageno(std::size_t i) const
- {
- return pagenos_[i];
- }
-
- const std::size_t* pagenos() const { return pagenos_.data(); }
- std::size_t* pagenos() { return pagenos_.data(); }
-
- const void* page(std::size_t i) const
- {
- return store_->get_page(pagenos_[i]);
- }
-
- PerPageCopy(PageStore& store, AddressSpace& as,
- remote_ptr<void> addr, std::size_t page_count,
- const size_t* ref_page_numbers, const std::uint64_t* pagemap);
-};
-