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author | Brad Bishop <bradleyb@fuzziesquirrel.com> | 2017-05-15 22:27:57 -0400 |
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committer | Brad Bishop <bradleyb@fuzziesquirrel.com> | 2017-05-23 18:56:57 -0400 |
commit | 186aa674239777bfba4d4fdf0b5974f40aaff081 (patch) | |
tree | e4be81e6a87a10b2c247ac0d3afb0a6a095bddd9 /src/tupleref.hpp | |
parent | 83c4349e79252f476912d0305ac0e33828d6d54f (diff) | |
download | phosphor-dbus-monitor-186aa674239777bfba4d4fdf0b5974f40aaff081.tar.gz phosphor-dbus-monitor-186aa674239777bfba4d4fdf0b5974f40aaff081.zip |
Add C++ type aliases
Add convenience type aliases for working with references:
RefKeyMap: A map with references as keys.
TupleRefMap: A map with a tuple of references as keys.
RefVector: A vector or references.
TupleOfRefs: A tuple of references.
Add DBus related convenience type aliases:
MapperPath: The Phosphor mapper currently uses a std::string for
object paths. This is a bug and will someday be switched
to sdbusplus::message::object_path. Add an alias for easy
refactoring.
InterfacesAdded: The C++ type for the
org.freedesktop.DBus.ObjectManager.InterfacesAdded signal
argument.
PropertiesChanged: The C++ type for the
org.freedesktop.DBus.Properties.PropertiesChanged signal
argument.
GetObject: The C++ type for the
xyz.openbmc_project.ObjectMapper.GetMethod method response.
Change-Id: I719aa7c610b3312ce8e52825cb07b33a348bf896
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
Diffstat (limited to 'src/tupleref.hpp')
-rw-r--r-- | src/tupleref.hpp | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/src/tupleref.hpp b/src/tupleref.hpp new file mode 100644 index 0000000..c6a6dcd --- /dev/null +++ b/src/tupleref.hpp @@ -0,0 +1,68 @@ +#pragma once + +#include <tuple> +#include <utility> + +namespace phosphor +{ +namespace dbus +{ +namespace monitoring +{ + +/** @brief A tuple of references. */ +template <typename... T> +using TupleOfRefs = std::tuple<std::reference_wrapper<T>...>; + +namespace detail +{ +/** @brief Less than implementation for tuples of references. */ +template <size_t size, size_t i, typename T, typename U> +struct TupleOfRefsLess +{ + static constexpr bool compare(const T& l, const U& r) + { + if (std::get<i>(l).get() < std::get<i>(r).get()) + { + return true; + } + if (std::get<i>(r).get() < std::get<i>(l).get()) + { + return false; + } + return TupleOfRefsLess < size, i + 1, T, U >::compare(l, r); + } +}; + +/** @brief Less than specialization for tuple element sizeof...(tuple) +1. */ +template <size_t size, typename T, typename U> +struct TupleOfRefsLess<size, size, T, U> +{ + static constexpr bool compare(const T& l, const U& r) + { + return false; + } +}; +} // namespace detail + +/** @brief Less than comparison for tuples of references. */ +struct TupleOfRefsLess +{ + template <typename... T, typename... U> + constexpr bool operator()( + const TupleOfRefs<T...>& l, + const TupleOfRefs<U...>& r) const + { + static_assert(sizeof...(T) == sizeof...(U), + "Cannot compare tuples of different lengths."); + return detail::TupleOfRefsLess < + sizeof...(T), + 0, + TupleOfRefs<T...>, + TupleOfRefs<U... >>::compare(l, r); + } +}; + +} // namespace monitoring +} // namespace dbus +} // namespace phosphor |