Asio provides timers based on the std::chrono facilities via the basic_waitable_timer class template. The typedefs system_timer, steady_timer and high_resolution_timer utilise the standard clocks system_clock, steady_clock and high_resolution_clock respectively.

Support for the std::chrono facilities is automatically enabled for g++ 4.6 and later, when the -std=c++0x or -std=gnu++0x compiler options are used. (Note that, for g++, the draft-standard monotonic_clock is used in place of steady_clock.) Support may be disabled by defining ASIO_DISABLE_STD_CHRONO, or explicitly enabled for other compilers by defining ASIO_HAS_STD_CHRONO.

When standard chrono is unavailable, Asio will otherwise use the Boost.Chrono library. The basic_waitable_timer class template may be used with either.