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78 lines
2.2 KiB
78 lines
2.2 KiB
/*
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* Copyright (C) 2021 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "host/libs/confui/host_utils.h"
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namespace cuttlefish {
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namespace confui {
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namespace thread {
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std::string ThreadTracer::Get(const std::thread::id tid) {
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std::lock_guard<std::mutex> lock(mtx_);
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if (id2name_.find(tid) != id2name_.end()) {
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return id2name_[tid];
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}
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std::stringstream ss;
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ss << "Thread@" << tid;
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return ss.str();
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}
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void ThreadTracer::Set(const std::string& name, const std::thread::id tid) {
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std::lock_guard<std::mutex> lock(mtx_);
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if (name2id_.find(name) != name2id_.end()) {
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// has the name already
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if (name2id_[name] != tid) { // used for another thread
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ConfUiLog(FATAL) << "Thread name is duplicated.";
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}
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// name and id are already set correctly
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return;
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}
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if (id2name_.find(tid) != id2name_.end()) {
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// tid exists but has a different name
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name2id_.erase(id2name_[tid]); // delete old_name -> tid map
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}
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id2name_[tid] = name;
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name2id_[name] = tid;
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return;
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}
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std::optional<std::thread::id> ThreadTracer::Get(const std::string& name) {
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std::lock_guard<std::mutex> lock(mtx_);
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if (name2id_.find(name) != name2id_.end()) {
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return {name2id_[name]};
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}
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return std::nullopt; // unknown
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}
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ThreadTracer& GetThreadTracer() {
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static ThreadTracer thread_tracer;
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return thread_tracer;
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}
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std::string GetName(const std::thread::id tid) {
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return GetThreadTracer().Get(tid);
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}
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std::optional<std::thread::id> GetId(const std::string& name) {
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return GetThreadTracer().Get(name);
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}
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void Set(const std::string& name, const std::thread::id tid) {
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GetThreadTracer().Set(name, tid);
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}
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} // namespace thread
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} // namespace confui
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} // namespace cuttlefish
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