initial commit

crypto/vm/atom.h

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+/*
+    This file is part of TON Blockchain Library.
+
+    TON Blockchain Library is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    TON Blockchain Library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with TON Blockchain Library.  If not, see <http://www.gnu.org/licenses/>.
+
+    Copyright 2017-2019 Telegram Systems LLP
+*/
+#pragma once
+#include <atomic>
+#include "vm/stack.hpp"
+#include "td/utils/Slice.h"
+
+namespace vm {
+using td::Ref;
+
+class Atom : public td::CntObject {
+  std::string name_;
+  int index_;
+  static constexpr unsigned hashtable_size = 170239;
+  static std::atomic<Atom*> hashtable[hashtable_size];
+  static std::atomic<int> atoms_defined;
+  static std::atomic<int> anon_atoms;
+  static std::pair<unsigned, unsigned> compute_hash(td::Slice name);
+
+ public:
+  Atom(const Atom&) = delete;
+  Atom &operator=(const Atom&) = delete;
+  Atom(Atom&&) = delete;
+  Atom &operator=(Atom&&) = delete;
+  ~Atom() override = default;
+  Atom(std::string name, int index) : name_(name), index_(index) {
+  }
+  static Ref<Atom> anon();
+  static Ref<Atom> find(td::Slice name, bool create = false);
+  static Ref<Atom> create(td::Slice name) {
+    return find(std::move(name), true);
+  }
+  std::string name() const {
+    return name_;
+  }
+  std::string name_ext() const {
+    return name_.empty() ? make_name() : name_;
+  }
+  td::Slice name_as_slice() const {
+    return td::Slice{name_};
+  }
+  int index() const {
+    return index_;
+  }
+  void print_to(std::ostream& os) const;
+
+ private:
+  std::string make_name() const;
+};
+
+std::ostream& operator<<(std::ostream& os, const Atom& atom);
+std::ostream& operator<<(std::ostream& os, Ref<Atom> atom_ref);
+
+}  // namespace vm