allocate lua properties in spi ram

src/lua/include/property.hpp

@@ -35,7 +35,7 @@ class Property {
   Property(const LuaValue&);
   Property(const LuaValue&, std::function<bool(const LuaValue&)>);
 
-  auto Get() -> const LuaValue& { return value_; }
+  auto Get() -> const LuaValue& { return *value_; }
 
   auto IsTwoWay() -> bool { return cb_.has_value(); }
 
@@ -46,7 +46,7 @@ class Property {
   auto AddLuaBinding(lua_State*, int ref) -> void;
 
  private:
-  LuaValue value_;
+  std::unique_ptr<LuaValue> value_;
   std::optional<std::function<bool(const LuaValue&)>> cb_;
   std::pmr::vector<std::pair<lua_State*, int>> bindings_;
 };

src/lua/property.cpp

@@ -9,6 +9,7 @@
 
 #include <cmath>
 #include <memory>
+#include <memory_resource>
 #include <string>
 #include <variant>
 
@@ -160,11 +161,15 @@ template <class... Ts>
 inline constexpr bool always_false_v = false;
 
 Property::Property(const LuaValue& val)
-    : value_(val), cb_(), bindings_(&memory::kSpiRamResource) {}
+    : value_(memory::SpiRamAllocator<LuaValue>().new_object<LuaValue>(val)),
+      cb_(),
+      bindings_(&memory::kSpiRamResource) {}
 
 Property::Property(const LuaValue& val,
                    std::function<bool(const LuaValue& val)> cb)
-    : value_(val), cb_(cb), bindings_(&memory::kSpiRamResource) {}
+    : value_(memory::SpiRamAllocator<LuaValue>().new_object<LuaValue>(val)),
+      cb_(cb),
+      bindings_(&memory::kSpiRamResource) {}
 
 static auto pushTagValue(lua_State* L, const database::TagValue& val) -> void {
   std::visit(
@@ -273,7 +278,7 @@ auto Property::PushValue(lua_State& s) -> int {
           static_assert(always_false_v<T>, "PushValue missing type");
         }
       },
-      value_);
+      *value_);
   return 1;
 }
 
@@ -343,7 +348,7 @@ auto Property::PopValue(lua_State& s) -> bool {
 }
 
 auto Property::Update(const LuaValue& v) -> void {
-  value_ = v;
+  *value_ = v;
 
   for (int i = bindings_.size() - 1; i >= 0; i--) {
     auto& b = bindings_[i];

src/memory/include/memory_resource.hpp

@@ -40,4 +40,9 @@ class Resource : public std::pmr::memory_resource {
 
 extern Resource kSpiRamResource;
 
+template <typename T>
+auto SpiRamAllocator() {
+  return std::pmr::polymorphic_allocator<T>{&kSpiRamResource};
+}
+
 }  // namespace memory