mirror of
https://github.com/ton-blockchain/ton
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72 lines
2.6 KiB
C++
72 lines
2.6 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/common.h"
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#include "td/utils/HazardPointers.h"
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#include "td/utils/logging.h"
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#include "td/utils/port/thread.h"
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#include "td/utils/Random.h"
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#include "td/utils/Slice.h"
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#include "td/utils/tests.h"
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#include <atomic>
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#if !TD_THREAD_UNSUPPORTED
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TEST(HazardPointers, stress) {
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struct Node {
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std::atomic<std::string *> name_{nullptr};
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char pad[64];
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};
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int threads_n = 10;
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std::vector<Node> nodes(threads_n);
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td::HazardPointers<std::string> hazard_pointers(threads_n);
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std::vector<td::thread> threads(threads_n);
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int thread_id = 0;
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for (auto &thread : threads) {
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thread = td::thread([&, thread_id] {
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std::remove_reference_t<decltype(hazard_pointers)>::Holder holder(hazard_pointers, thread_id, 0);
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for (int i = 0; i < 1000000; i++) {
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auto &node = nodes[td::Random::fast(0, threads_n - 1)];
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auto *str = holder.protect(node.name_);
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if (str) {
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CHECK(*str == td::Slice("one") || *str == td::Slice("twotwo"));
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}
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holder.clear();
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if (td::Random::fast(0, 5) == 0) {
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std::string *new_str = new std::string(td::Random::fast(0, 1) == 0 ? "one" : "twotwo");
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if (node.name_.compare_exchange_strong(str, new_str, std::memory_order_acq_rel)) {
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hazard_pointers.retire(thread_id, str);
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} else {
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delete new_str;
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}
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}
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}
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});
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thread_id++;
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}
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for (auto &thread : threads) {
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thread.join();
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}
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LOG(ERROR) << "Undeleted pointers: " << hazard_pointers.to_delete_size_unsafe();
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CHECK(static_cast<int>(hazard_pointers.to_delete_size_unsafe()) <= threads_n * threads_n);
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for (int i = 0; i < threads_n; i++) {
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hazard_pointers.retire(i);
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}
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CHECK(hazard_pointers.to_delete_size_unsafe() == 0);
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}
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#endif //!TD_THREAD_UNSUPPORTED
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