Use std::lock_guard instead of STG_LOCKER.
drwxr-xr-x - .github
-rw-r--r-- 96 .gitignore
-rw-r--r-- 103 .gitmodules
-rw-r--r-- 699 .travis.yml
drwxr-xr-x - 3rdparty
-rw-r--r-- 6260 CMakeLists.txt
-rw-r--r-- 8735 ChangeLog
-rw-r--r-- 166 README.md
drwxr-xr-x - checks
drwxr-xr-x - cmake
drwxr-xr-x - doc
drwxr-xr-x - functest
drwxr-xr-x - include
drwxr-xr-x - libs
drwxr-xr-x - make_tarball
drwxr-xr-x - projects
drwxr-xr-x - tests