mirror of
https://gitee.com/jiuyilian/embedded-framework.git
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38 lines
1.4 KiB
C++
38 lines
1.4 KiB
C++
/*
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* Copyright (c) 2023 Fancy Code.
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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 "IStateMachine.h"
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#include "ILog.h"
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#include <thread>
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std::shared_ptr<IStateMachine> &IStateMachine::GetInstance(std::shared_ptr<IStateMachine> *impl)
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{
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static std::shared_ptr<IStateMachine> instance = std::make_shared<IStateMachine>();
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static bool instanceChanging = false;
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if (impl && false == instanceChanging) {
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instanceChanging = true;
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if (instance.use_count() == 1) {
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LogInfo("Instance change succeed.\n");
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instance = *impl;
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}
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else {
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LogError("Instance change failed, using by some one.\n");
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}
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instanceChanging = false;
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}
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if (instanceChanging) {
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static std::shared_ptr<IStateMachine> tmporaryInstance = std::make_shared<IStateMachine>();
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return tmporaryInstance;
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}
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return instance;
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} |