class sys::ios_guardI/O stream state guard. Saves/restores std::ios_base flags and fill character upon construction/destruction.
template <class Ch, class Tr> class sys::basic_ipacket_guardGuard object that preserves packet buffer state upon failure.
template <class Mutex> class sys::simple_lock
A lock guard with lock and unlock methods.
template <class Mutex> class sys::unlock_guard
The inverse of standard lock guard.
class sys::signal_guardBlocks/unblocks specified signals upon creation/destruction.