mirror of
https://github.com/ton-blockchain/ton
synced 2025-03-09 15:40:10 +00:00
64 lines
1.9 KiB
C++
64 lines
1.9 KiB
C++
/*
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This file is part of TON Blockchain Library.
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TON Blockchain Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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TON Blockchain Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with TON Blockchain Library. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2017-2020 Telegram Systems LLP
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*/
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#include "td/utils/port/detail/ThreadIdGuard.h"
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#include "td/utils/common.h"
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#include "td/utils/port/thread_local.h"
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#include <mutex>
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#include <set>
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namespace td {
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namespace detail {
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class ThreadIdManager {
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public:
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int32 register_thread() {
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std::lock_guard<std::mutex> guard(mutex_);
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if (unused_thread_ids_.empty()) {
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return ++max_thread_id_;
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}
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auto it = unused_thread_ids_.begin();
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auto result = *it;
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unused_thread_ids_.erase(it);
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return result;
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}
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void unregister_thread(int32 thread_id) {
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std::lock_guard<std::mutex> guard(mutex_);
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CHECK(0 < thread_id && thread_id <= max_thread_id_);
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bool is_inserted = unused_thread_ids_.insert(thread_id).second;
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CHECK(is_inserted);
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}
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private:
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std::mutex mutex_;
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std::set<int32> unused_thread_ids_;
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int32 max_thread_id_ = 0;
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};
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static ThreadIdManager thread_id_manager;
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ThreadIdGuard::ThreadIdGuard() {
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thread_id_ = thread_id_manager.register_thread();
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set_thread_id(thread_id_);
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}
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ThreadIdGuard::~ThreadIdGuard() {
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thread_id_manager.unregister_thread(thread_id_);
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set_thread_id(0);
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}
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} // namespace detail
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} // namespace td
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