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tdutils/td/utils/Destructor.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 "td/utils/common.h"
+
+#include <memory>
+#include <utility>
+
+namespace td {
+
+class Destructor {
+ public:
+  Destructor() = default;
+  Destructor(const Destructor &other) = delete;
+  Destructor &operator=(const Destructor &other) = delete;
+  Destructor(Destructor &&other) = default;
+  Destructor &operator=(Destructor &&other) = default;
+  virtual ~Destructor() = default;
+};
+
+template <class F>
+class LambdaDestructor : public Destructor {
+ public:
+  explicit LambdaDestructor(F &&f) : f_(std::move(f)) {
+  }
+  LambdaDestructor(const LambdaDestructor &other) = delete;
+  LambdaDestructor &operator=(const LambdaDestructor &other) = delete;
+  LambdaDestructor(LambdaDestructor &&other) = default;
+  LambdaDestructor &operator=(LambdaDestructor &&other) = default;
+  ~LambdaDestructor() override {
+    f_();
+  }
+
+ private:
+  F f_;
+};
+
+template <class F>
+auto create_destructor(F &&f) {
+  return make_unique<LambdaDestructor<F>>(std::forward<F>(f));
+}
+template <class F>
+auto create_shared_destructor(F &&f) {
+  return std::make_shared<LambdaDestructor<F>>(std::forward<F>(f));
+}
+
+}  // namespace td