From 75f8b84794fc52fecefa31b4f6c610ec98b78c0c Mon Sep 17 00:00:00 2001
From: tobid7 <tobid7@outlook.de>
Date: Thu, 2 May 2024 20:17:37 +0200
Subject: [PATCH] Add C++ Allocator for libctru linear memory

---
 include/rd7.hpp                |  1 +
 include/renderd7/Allocator.hpp | 41 ++++++++++++++++++++++++++++++++++
 2 files changed, 42 insertions(+)
 create mode 100644 include/renderd7/Allocator.hpp

diff --git a/include/rd7.hpp b/include/rd7.hpp
index 50812c5..edc5898 100644
--- a/include/rd7.hpp
+++ b/include/rd7.hpp
@@ -1,5 +1,6 @@
 #pragma once
 
+#include <renderd7/Allocator.hpp>
 #include <renderd7/DrawV2.hpp>
 #include <renderd7/Error.hpp>
 #include <renderd7/FileSystem.hpp>
diff --git a/include/renderd7/Allocator.hpp b/include/renderd7/Allocator.hpp
new file mode 100644
index 0000000..f32e6d4
--- /dev/null
+++ b/include/renderd7/Allocator.hpp
@@ -0,0 +1,41 @@
+#pragma once
+
+#include <memory>
+#include <3ds.h>
+
+#include <renderd7/Error.hpp>
+
+// Write own LinearAllocator for learning
+
+namespace RenderD7 {
+    template<typename T>
+    class LinearAllocator : public std::allocator<T> {
+        public:
+        typedef size_t size_type;
+        typedef T* pointer;
+        typedef const T* const_pointer;
+
+        template<typename T1>
+        struct rebind {typedef LinearAllocator<T1> other;};
+
+        pointer allocate(size_type n, const void* hint=nullptr) {
+            if(n > this->max_size()) {
+                RenderD7::Error("Linear Allocator: \nBad Alloc -> size is larger than free space!");
+                return nullptr;
+            }
+            return (pointer)linearAlloc(n*sizeof(T));
+        }
+
+        void deallocate(pointer p, size_type) {
+            linearFree((void*)p);
+        }
+
+        size_type max_size() {
+            return linearSpaceFree();
+        }
+
+        LinearAllocator() throw() {}
+        LinearAllocator(const LinearAllocator<T>& a) throw(): std::allocator<T>(a) {}
+        ~LinearAllocator() throw() {}
+    };
+}
\ No newline at end of file