embedded-framework/utils/Log/abstract/ILogCpp.cpp

#include "ILogCpp.h"
#include <memory>
std::shared_ptr<ILogCpp> &ILogCpp::GetInstance(std::shared_ptr<ILogCpp> *impl)
{
    static std::shared_ptr<ILogCpp> instance = std::make_shared<ILogCpp>();
    static bool instanceChanging = false;
    if (impl && false == instanceChanging)
    {
        // Don't use std::mutex for runing faster.
        // Sleep for difference thread to release instance.
        instanceChanging = true;
        // std::this_thread::sleep_for(std::chrono::milliseconds(100)); // Don't sleep and make sure that start fast.
        if (instance.use_count() == 1) // bug?
        {
            // LogInfo("Instance change succeed.\n");
            // instance->UnInit();
            // (*impl)->Init();
            instance = *impl;
        }
        else
        {
            // LogError("[ error ] instance change failed, using by some one.\n");
        }
        instanceChanging = false;
    }
    if (instanceChanging)
    {
        static std::shared_ptr<ILogCpp> tmporaryInstance = std::make_shared<ILogCpp>();
        return tmporaryInstance;
    }
    return instance;
}