change to std::lock_guard
change to std::lock_guard

huanzhang12/LightGBM,huanzhang12/lightgbm-gpu,fstonezst/LightGBM,henry0312/LightGBM,olofer/LightGBM,huanzhang12/lightgbm-gpu,Laurae2/LightGBM,Allardvm/LightGBM,microsoft/LightGBM,Laurae2/LightGBM,sightmachine/LightGBM,cbecker/LightGBM,olofer/LightGBM,cbecker/LightGBM,wxchan/LightGBM,Laurae2/LightGBM,wxchan/LightGBM,microsoft/LightGBM,Allardvm/LightGBM,henry0312/LightGBM,sightmachine/LightGBM,olofer/LightGBM,Laurae2/LightGBM,henry0312/LightGBM,microsoft/LightGBM,microsoft/LightGBM,Allardvm/LightGBM,huanzhang12/lightgbm-gpu,huanzhang12/LightGBM,henry0312/LightGBM,fstonezst/LightGBM,huanzhang12/LightGBM,wxchan/LightGBM,cbecker/LightGBM,fstonezst/LightGBM,Allardvm/LightGBM,henry0312/LightGBM,olofer/LightGBM,huanzhang12/lightgbm-gpu,wxchan/LightGBM,huanzhang12/LightGBM,olofer/LightGBM,fstonezst/LightGBM,fstonezst/LightGBM,huanzhang12/LightGBM,huanzhang12/lightgbm-gpu,sightmachine/LightGBM,cbecker/LightGBM,microsoft/LightGBM,Allardvm/LightGBM,wxchan/LightGBM,Laurae2/LightGBM,sightmachine/LightGBM