From 8b3ade73997e9f87f1232b9dc9af35969e6f50dd Mon Sep 17 00:00:00 2001
From: "Claudius \"keldu\" Holeksa" <mail@keldu.de>
Date: Mon, 19 Jan 2026 13:35:25 +0100
Subject: Rewriting parts to handle different ghost layers

---
 lib/sycl/c++/data.hpp | 117 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 117 insertions(+)
 create mode 100644 lib/sycl/c++/data.hpp

(limited to 'lib/sycl/c++/data.hpp')

diff --git a/lib/sycl/c++/data.hpp b/lib/sycl/c++/data.hpp
new file mode 100644
index 0000000..67422e2
--- /dev/null
+++ b/lib/sycl/c++/data.hpp
@@ -0,0 +1,117 @@
+#pragma once
+
+#include "common.hpp"
+
+namespace kel {
+namespace lbm {
+namespace encode {
+template<typename Encode>
+struct Sycl {
+};
+}
+
+namespace impl {
+template<typename Schema>
+struct struct_has_only_equal_dimension_array
+}
+}
+}
+
+namespace saw {
+template<uint64_t... Meta, typename... Sch, string_literal... Keys, typename Encode>
+class data<schema::Struct<schema::Member<schema::FixedArray<Sch,Meta...>, Keys>...>, kel::lbm::encode::Sycl<Encode>> final {
+public:
+	static constexpr data<schema::FixedArray meta = {{Meta...}};
+	using StorageT = std::tuple<data<Members::Type::InnerSchema,Encode>*...>;
+private:
+
+	/**
+	 * @todo Check by static assert that the members all have the same dimensions. Alternatively
+	 * Do it here by specializing.
+	 */
+	StorageT members_;
+	kel::lbm::sycl::queue* q_;
+public:
+	data():
+		members_{},
+		q_{nullptr}
+	{}
+
+	~data(){
+		SAW_ASSERT(q_){
+			exit(-1);
+		}
+		std::visit([this](auto arg){
+			if(not arg){
+				return;
+			}
+			sycl::free(arg,*q_);
+			arg = nullptr;
+		},members_);
+	}
+
+	template<saw::string_literal K>
+	auto* get_ptr(){
+		return std::get<parameter_key_pack_index<K, Keys...>::value(members_);
+	}
+
+	template<saw::string_literal K>
+	auto& get(){
+		auto ptr = get_ptr<K>();
+		SAW_ASSERT(ptr);
+		return *ptr;
+	}
+
+	void set_queue(kel::lbm::sycl::queue& q){
+		q_ = &q;
+	}
+};
+
+}
+
+namespace kel {
+namespace lbm {
+namespace impl {
+template<typename Sch, typename Encode>
+struct sycl_malloc_struct_helper;
+	
+template<typename... Members, typename Encode>
+struct sycl_malloc_struct_helper<sch::Struct<Members...>, Encode> final {
+	template<uint64_t i>
+	static saw::error_or<void> allocate_on_device_member(typename data<Sch,encode::Sycl<Encode>>::StorageT& storage, sycl::queue& q){
+		if constexpr (i < sizeof...(Members)){
+			auto& ptr = std::get<i>(storage);
+
+			return allocate_on_device_member<i+1u>(sycl_data,q);
+		}
+		
+		return saw::make_void();
+	}
+	
+	static saw::error_or<void> allocate_on_device(data<Sch,encode::Sycl<Encode>>& sycl_data, sycl::queue& q){
+		typename data<Sch,encode::Sycl<Encode>>::StorageT storage;
+		return allocate_on_device_member<0u>(storage,q);
+	}
+};
+}
+class device final {
+private:
+	sycl::queue q_;
+
+	SAW_FORBID_COPY(device);
+	SAW_FORBID_MOVE(device);
+public:
+	device() = default;
+	~device() = default;
+
+	template<typename Sch, typename Encode>
+	saw::error_or<void> allocate_on_device(data<Sch,encode::Sycl<Encode>>& sycl_data){
+		auto eov = sycl_malloc_struct_helper<Sch,Encode>::allocate_on_device(sycl_data, q_);
+		if(eov.is_error()){
+			return eov;
+		}
+		sycl_data.set_queue(q_);
+	}
+};
+}
+}
-- 
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