initial commit

common/delay.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/actor/actor.h"
+
+namespace ton {
+
+template <typename T>
+class DelayedAction : public td::actor::Actor {
+ public:
+  DelayedAction(T promise) : promise_(std::move(promise)) {
+  }
+  void set_timer(td::Timestamp t) {
+    alarm_timestamp() = t;
+  }
+  void alarm() override {
+    promise_();
+    stop();
+  }
+
+  static void create(T promise, td::Timestamp t) {
+    auto A = td::actor::create_actor<DelayedAction>("delayed", std::move(promise));
+    td::actor::send_closure(A, &DelayedAction::set_timer, t);
+    A.release();
+  }
+
+ private:
+  T promise_;
+};
+
+template <typename T>
+void delay_action(T promise, td::Timestamp timeout) {
+  DelayedAction<T>::create(std::move(promise), timeout);
+}
+}  // namespace ton