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  1. //
  2. // detail/handler_cont_helpers.hpp
  3. // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  4. //
  5. // Copyright (c) 2003-2019 Christopher M. Kohlhoff (chris at kohlhoff dot com)
  6. //
  7. // Distributed under the Boost Software License, Version 1.0. (See accompanying
  8. // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
  9. //
  10. #ifndef ASIO_DETAIL_HANDLER_CONT_HELPERS_HPP
  11. #define ASIO_DETAIL_HANDLER_CONT_HELPERS_HPP
  12. #if defined(_MSC_VER) && (_MSC_VER >= 1200)
  13. # pragma once
  14. #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
  15. #include "asio/detail/config.hpp"
  16. #include "asio/detail/memory.hpp"
  17. #include "asio/handler_continuation_hook.hpp"
  18. #include "asio/detail/push_options.hpp"
  19. // Calls to asio_handler_is_continuation must be made from a namespace that
  20. // does not contain overloads of this function. This namespace is defined here
  21. // for that purpose.
  22. namespace asio_handler_cont_helpers {
  23. template <typename Context>
  24. inline bool is_continuation(Context& context)
  25. {
  26. #if !defined(ASIO_HAS_HANDLER_HOOKS)
  27. return false;
  28. #else
  29. using asio::asio_handler_is_continuation;
  30. return asio_handler_is_continuation(
  31. asio::detail::addressof(context));
  32. #endif
  33. }
  34. } // namespace asio_handler_cont_helpers
  35. #include "asio/detail/pop_options.hpp"
  36. #endif // ASIO_DETAIL_HANDLER_CONT_HELPERS_HPP