#### posix::basic_descriptor::release

Release ownership of the native descriptor implementation.

    native_handle_type release();

This function may be used to obtain the underlying representation of the descriptor. After calling this function, `is_open()` returns false. The caller is responsible for closing the descriptor.

All outstanding asynchronous read or write operations will finish immediately, and the handlers for cancelled operations will be passed the `asio::error::operation_aborted` error.