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tdutils/td/utils/port/detail/ThreadStl.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/port/config.h"
+
+#ifdef TD_THREAD_STL
+
+#include "td/utils/common.h"
+#include "td/utils/invoke.h"
+#include "td/utils/port/detail/ThreadIdGuard.h"
+#include "td/utils/port/thread_local.h"
+#include "td/utils/Slice.h"
+
+#include <thread>
+#include <tuple>
+#include <type_traits>
+#include <utility>
+
+namespace td {
+namespace detail {
+class ThreadStl {
+ public:
+  ThreadStl() = default;
+  ThreadStl(const ThreadStl &other) = delete;
+  ThreadStl &operator=(const ThreadStl &other) = delete;
+  ThreadStl(ThreadStl &&) = default;
+  ThreadStl &operator=(ThreadStl &&) = default;
+  ~ThreadStl() {
+    join();
+  }
+  template <class Function, class... Args>
+  explicit ThreadStl(Function &&f, Args &&... args) {
+    thread_ = std::thread([args = std::make_tuple(decay_copy(std::forward<Function>(f)),
+                                                  decay_copy(std::forward<Args>(args))...)]() mutable {
+      ThreadIdGuard thread_id_guard;
+      invoke_tuple(std::move(args));
+      clear_thread_locals();
+    });
+  }
+
+  void join() {
+    if (thread_.joinable()) {
+      thread_.join();
+    }
+  }
+  void detach() {
+    if (thread_.joinable()) {
+      thread_.detach();
+    }
+  }
+  void set_name(CSlice name) {
+  }
+
+  static unsigned hardware_concurrency() {
+    return std::thread::hardware_concurrency();
+  }
+
+  using id = std::thread::id;
+
+ private:
+  std::thread thread_;
+
+  template <class T>
+  std::decay_t<T> decay_copy(T &&v) {
+    return std::forward<T>(v);
+  }
+};
+namespace this_thread_stl = std::this_thread;
+}  // namespace detail
+}  // namespace td
+
+#endif