72 lines
1.5 KiB
C++
72 lines
1.5 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2019
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#pragma once
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#include "td/actor/actor.h"
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#include "td/utils/common.h"
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#include "td/utils/optional.h"
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#include <functional>
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namespace td {
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template <class T>
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class SchedulerLocalStorage {
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public:
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SchedulerLocalStorage() : data_(Scheduler::instance()->sched_count()) {
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}
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T &get() {
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return data_[Scheduler::instance()->sched_id()];
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}
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template <class F>
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void for_each(F &&f) {
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for (auto &value : data_) {
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f(value);
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}
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}
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template <class F>
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void for_each(F &&f) const {
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for (const auto &value : data_) {
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f(value);
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}
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}
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private:
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std::vector<T> data_;
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};
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template <class T>
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class LazySchedulerLocalStorage {
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public:
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LazySchedulerLocalStorage() = default;
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explicit LazySchedulerLocalStorage(std::function<T()> create_func) : create_func_(std::move(create_func)) {
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}
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T &get() {
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auto &optional_value_ = sls_optional_value_.get();
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if (!optional_value_) {
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CHECK(create_func_);
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optional_value_ = create_func_();
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}
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return *optional_value_;
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}
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void clear_values() {
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sls_optional_value_.for_each([&](auto &optional_value) {
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if (optional_value) {
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optional_value = optional<T>();
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}
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});
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}
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private:
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std::function<T()> create_func_;
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SchedulerLocalStorage<optional<T>> sls_optional_value_;
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};
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} // namespace td
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