39 lines
1010 B
C++
39 lines
1010 B
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2021
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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/utils/common.h"
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#include <atomic>
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namespace td {
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class UniqueId {
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public:
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enum Type : uint8 { Default, DcAuth, GetConfig, BindKey, TempFile };
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static uint64 next() {
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return next(Default, 0);
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}
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static uint64 next(Type type) {
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return next(type, 0);
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}
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static uint64 next(Type type, uint8 key) {
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// TODO: this is VERY ineffective
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static std::atomic<uint64> current_id{1};
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return ((current_id.fetch_add(1, std::memory_order_relaxed)) << 16) | (static_cast<uint64>(type) << 8) | key;
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}
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static uint8 extract_key(uint64 id) {
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return static_cast<uint8>(id);
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}
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static Type extract_type(uint64 id) {
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return static_cast<Type>(static_cast<uint8>(id >> 8));
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}
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};
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} // namespace td
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