Function try_lock_impl

extern/boost/boost/thread/lock_algorithms.hpp:304–307

    template <typename MutexType1, typename MutexType2>
    int try_lock_impl(MutexType1& m1, MutexType2& m2, is_mutex_type_wrapper<true> )
    {
      return ((int) detail::try_lock_internal(m1, m2)) - 1;
    }

    template <typename Iterator>
    Iterator try_lock_impl(Iterator begin, Iterator end, is_mutex_type_wrapper<false> );