From 3a2c2b4e1640371b8005af3dfb35bd907213301e Mon Sep 17 00:00:00 2001
From: auguste120 <vinzlehacker@gmail.com>
Date: Wed, 1 Apr 2026 18:14:56 +0200
Subject: [PATCH] Implements gsys::MemBuffer

---
 data/uking_functions.csv              | 12 +++++-----
 lib/gsys/CMakeLists.txt               |  2 ++
 lib/gsys/include/gsys/gsysMemBuffer.h | 23 +++++++++++++++++++
 lib/gsys/src/gsys/gsysMemBuffer.cpp   | 32 +++++++++++++++++++++++++++
 4 files changed, 63 insertions(+), 6 deletions(-)
 create mode 100644 lib/gsys/include/gsys/gsysMemBuffer.h
 create mode 100644 lib/gsys/src/gsys/gsysMemBuffer.cpp

diff --git a/data/uking_functions.csv b/data/uking_functions.csv
index ca006143..bfd0fad2 100644
--- a/data/uking_functions.csv
+++ b/data/uking_functions.csv
@@ -70514,12 +70514,12 @@ Address,Quality,Size,Name
 0x0000007100c7cd74,U,000140,
 0x0000007100c7ce00,U,000176,
 0x0000007100c7ceb0,U,000052,_ZN4gsys12MemAllocator8tryAllocEmj
-0x0000007100c7cee4,U,000024,_ZN4gsys9MemBufferC2Ev
-0x0000007100c7cefc,U,000004,nullsub_3622
-0x0000007100c7cf00,U,000004,j__ZdlPv_832
-0x0000007100c7cf04,U,000104,_ZN4gsys9MemBuffer8tryAllocEPN4sead4HeapEmj
-0x0000007100c7cf6c,U,000016,_ZN4gsys9MemBuffer4freeEv
-0x0000007100c7cf7c,U,000052,_ZN4gsys9MemBuffer5allocEmj
+0x0000007100c7cee4,O,000024,_ZN4gsys9MemBufferC2Ev
+0x0000007100c7cefc,O,000004,_ZN4gsys9MemBufferD1Ev
+0x0000007100c7cf00,O,000004,_ZN4gsys9MemBufferD0Ev
+0x0000007100c7cf04,O,000104,_ZN4gsys9MemBuffer8tryAllocEPN4sead4HeapEmj
+0x0000007100c7cf6c,O,000016,_ZN4gsys9MemBuffer4freeEv
+0x0000007100c7cf7c,O,000052,_ZN4gsys9MemBuffer5allocEmj
 0x0000007100c7cfb0,U,000060,_ZN4gsys23ModelAnimationDebugInfoD2Ev
 0x0000007100c7cfec,U,000244,
 0x0000007100c7d0e0,U,000060,_ZN4gsys21ModelAssignRenderInfoC2Ev
diff --git a/lib/gsys/CMakeLists.txt b/lib/gsys/CMakeLists.txt
index bec73906..13947de7 100644
--- a/lib/gsys/CMakeLists.txt
+++ b/lib/gsys/CMakeLists.txt
@@ -4,6 +4,7 @@ add_library(gsys OBJECT
   include/gsys/gsysMaskedProjLight.h
   include/gsys/gsysMaskedProjLight.h
   include/gsys/gsysMaskedSpotLight.h
+  include/gsys/gsysMemBuffer.h
   include/gsys/gsysModel.h
   include/gsys/gsysModelAccessKey.h
   include/gsys/gsysModelNW.h
@@ -16,6 +17,7 @@ add_library(gsys OBJECT
   include/gsys/gsysPointLight.h
   include/gsys/gsysSpotLight.h
 
+  src/gsys/gsysMemBuffer.cpp
   src/gsys/gsysModelAccessKey.cpp
   src/gsys/gsysModelSceneConfig.cpp
   src/gsys/gsysParticleConfig.cpp
diff --git a/lib/gsys/include/gsys/gsysMemBuffer.h b/lib/gsys/include/gsys/gsysMemBuffer.h
new file mode 100644
index 00000000..1dcec12d
--- /dev/null
+++ b/lib/gsys/include/gsys/gsysMemBuffer.h
@@ -0,0 +1,23 @@
+#pragma once
+
+#include <basis/seadTypes.h>
+#include <heap/seadHeap.h>
+
+namespace gsys {
+
+class MemBuffer {
+public:
+    MemBuffer();
+    virtual ~MemBuffer();
+
+    void* alloc(size_t size, u32 align);
+    void tryAlloc(sead::Heap* heap, size_t size, u32 align);
+    void free();
+
+private:
+    void* mBuffer = nullptr;
+    uintptr_t mOffset = 0;
+    size_t mSize = 0;
+};
+
+}  // namespace gsys
\ No newline at end of file
diff --git a/lib/gsys/src/gsys/gsysMemBuffer.cpp b/lib/gsys/src/gsys/gsysMemBuffer.cpp
new file mode 100644
index 00000000..0ac332e0
--- /dev/null
+++ b/lib/gsys/src/gsys/gsysMemBuffer.cpp
@@ -0,0 +1,32 @@
+#include "gsys/gsysMemBuffer.h"
+
+#include <basis/seadNew.h>
+#include <heap/seadHeapMgr.h>
+#include <math/seadMathCalcCommon.h>
+
+namespace gsys {
+
+MemBuffer::MemBuffer() = default;
+MemBuffer::~MemBuffer() = default;
+
+void MemBuffer::tryAlloc(sead::Heap* heap, size_t size, u32 align) {
+    if (!heap)
+        heap = sead::HeapMgr::sInstancePtr->getCurrentHeap();
+    void* buffer = heap->tryAlloc(size, static_cast<s32>(align));
+    mSize = size;
+    mOffset = 0;
+    mBuffer = buffer;
+}
+
+void* MemBuffer::alloc(size_t size, u32 align) {
+    uintptr_t current = mOffset + reinterpret_cast<uintptr_t>(mBuffer);
+    uintptr_t aligned = sead::MathSizeT::roundUp(current, align);
+    mOffset += aligned - current + size;
+    return reinterpret_cast<void*>(aligned);
+}
+
+void MemBuffer::free() {
+    delete static_cast<u8*>(mBuffer);
+}
+
+}  // namespace gsys
\ No newline at end of file