__GNU_CXX::__SCOPED_LOCK(3CXX) - Linux man page online | Library functions
Scoped lock idiom.
Chapter
Tue Mar 10 2020
__gnu_cxx::__scoped_lock(3cxx) __gnu_cxx::__scoped_lock(3cxx)
libstdc++ Tue Mar 10 2020 __gnu_cxx::__scoped_lock(3cxx)