From 6d6452b24e15e6291ba5790ede485f59d4ca28b8 Mon Sep 17 00:00:00 2001
From: "Claudius \"keldu\" Holeksa" <mail@keldu.de>
Date: Fri, 23 Jan 2026 16:39:27 +0100
Subject: Fixed Address boundary issues with different copy approach

---
 default.nix                                 |  5 +++++
 examples/poiseulle_particles_2d_gpu/sim.cpp | 19 +++++--------------
 lib/core/c++/chunk.hpp                      |  1 +
 lib/sycl/c++/data.hpp                       | 18 +++++++++++++++---
 4 files changed, 26 insertions(+), 17 deletions(-)

diff --git a/default.nix b/default.nix
index fd36323..d46eed5 100644
--- a/default.nix
+++ b/default.nix
@@ -102,6 +102,11 @@ in rec {
 			inherit pname version stdenv forstio adaptive-cpp;
 			inherit kel;
 		};
+		
+		s_poiseulle_particles_2d_gpu = pkgs.callPackage ./examples/s_poiseulle_particles_2d_gpu/.nix/derivation.nix {
+			inherit pname version stdenv forstio adaptive-cpp;
+			inherit kel;
+		};
 
 		poiseulle_3d = pkgs.callPackage ./examples/poiseulle_3d/.nix/derivation.nix {
 			inherit pname version stdenv forstio adaptive-cpp;
diff --git a/examples/poiseulle_particles_2d_gpu/sim.cpp b/examples/poiseulle_particles_2d_gpu/sim.cpp
index 008d8f0..bb1fca5 100644
--- a/examples/poiseulle_particles_2d_gpu/sim.cpp
+++ b/examples/poiseulle_particles_2d_gpu/sim.cpp
@@ -1,5 +1,5 @@
-#include <kel/lbm/lbm.hpp>
 #include <kel/lbm/sycl/lbm.hpp>
+#include <kel/lbm/lbm.hpp>
 
 #include <forstio/remote/filesystem/easy.hpp>
 #include <forstio/codec/json/json.hpp>
@@ -13,16 +13,6 @@ constexpr uint64_t dim_y = 16u;
 namespace sch {
 using namespace saw::schema;
 
-template<typename T, typename Desc>
-using CellStruct = Struct<
-	Member<FixedArray<T,Desc::Q>, "dfs">,
-	Member<FixedArray<T,Desc::Q>, "dfs_old">,
-	Member<UInt8, "info">,
-	Member<Vector<T,Desc::D>, "velocity">,
-	Member<Vector<T,Desc::D>, "force">
->;
-
-
 using InfoChunk = Chunk<UInt8, 0u, dim_x, dim_y>;
 
 template<typename T, typename Desc>
@@ -127,14 +117,15 @@ saw::error_or<void> lbm_main(int argc, char** argv){
 	};
 
 	// saw::data<sch::FixedArray<sch::UInt64,Desc::D>> meta{{dim_x,dim_y}};
-	saw::data<sch::ChunkStruct<T,Desc>> lbm_data{};
+	auto lbm_data_ptr = saw::heap<saw::data<sch::ChunkStruct<T,Desc>>>();
 
 	device dev;
+
 	auto& sycl_q = dev.get_handle();
 
 	sycl_q.wait();
 	{
-		auto eov = setup_initial_conditions<T,Desc>(lbm_data);
+		auto eov = setup_initial_conditions<T,Desc>(*lbm_data_ptr);
 		if(eov.is_error()){
 			return eov;
 		}
@@ -147,7 +138,7 @@ saw::error_or<void> lbm_main(int argc, char** argv){
 	sycl_q.wait();
 	std::cout<<"Hey2"<<std::endl;
 	{
-		auto eov = dev.copy_to_device(lbm_data,lbm_sycl_data);
+		auto eov = dev.copy_to_device(*lbm_data_ptr,lbm_sycl_data);
 		if(eov.is_error()){
 			return eov;
 		}
diff --git a/lib/core/c++/chunk.hpp b/lib/core/c++/chunk.hpp
index 1da2c9f..5d20faa 100644
--- a/lib/core/c++/chunk.hpp
+++ b/lib/core/c++/chunk.hpp
@@ -1,6 +1,7 @@
 #pragma once
 
 #include "common.hpp"
+#include "flatten.hpp"
 
 namespace kel {
 namespace lbm {
diff --git a/lib/sycl/c++/data.hpp b/lib/sycl/c++/data.hpp
index c6ea281..cffeb38 100644
--- a/lib/sycl/c++/data.hpp
+++ b/lib/sycl/c++/data.hpp
@@ -33,15 +33,19 @@ public:
 		q_{&q__},
 		values_{nullptr}
 	{
-		values_ = acpp::sycl::malloc_device<data<Sch>>(ct_multiply<uint64_t,Dims...>::value,*q_);
+		std::cout<<"Hey: "<<ct_multiply<uint64_t,Dims...>::value<<std::endl;
+		values_ = acpp::sycl::malloc_device<data<Sch,Encode>>(ct_multiply<uint64_t,Dims...>::value,*q_);
+		SAW_ASSERT(values_ and q_);
 	}
 
 	~data(){
 		if(not values_){
 			return;
 		}
+		SAW_ASSERT(q_);
 
 		acpp::sycl::free(values_,*q_);
+		values_ = nullptr;
 	}
 
 	static constexpr data<schema::FixedArray<schema::UInt64, sizeof...(Dims)>> get_dims() {
@@ -169,7 +173,13 @@ struct sycl_copy_helper<sch::Struct<Members...>, Encode> final {
 			auto host_ptr = host_member_data.flat_data();
 			auto sycl_ptr = sycl_member_data.flat_data();
 
-			q.memcpy(host_ptr, sycl_ptr, sizeof(std::decay_t<decltype(host_ptr)>) * host_member_data.flat_size().get() );
+			static_assert(sizeof(std::decay_t<decltype(sycl_ptr)>) == sizeof(std::decay_t<decltype(host_ptr)>), "Unequal size");
+
+			std::cout<<host_member_data.flat_size().get()<<" "<<std::endl;
+
+			q.submit([&](acpp::sycl::handler& h){
+				h.copy(host_ptr,sycl_ptr, host_member_data.flat_size().get());
+			}).wait();
 
 			return copy_to_device_member<i+1u>(host_data,sycl_data,q);
 		}
@@ -192,7 +202,9 @@ struct sycl_copy_helper<sch::Struct<Members...>, Encode> final {
 			auto host_ptr = host_member_data.flat_data();
 			auto sycl_ptr = sycl_member_data.flat_data();
 
-			q.memcpy(sycl_ptr, host_ptr, sizeof(std::decay_t<decltype(host_ptr)>) * host_member_data.flat_size().get() );
+			q.submit([&](acpp::sycl::handler& h){
+				h.copy(sycl_ptr,host_ptr, host_member_data.flat_size().get());
+			}).wait();
 
 			return copy_to_host_member<i+1u>(sycl_data,host_data,q);
 		}
-- 
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