libstrat: convert to experimental new (super-accurate) sf allocation semantics

libraries/libstratosphere/include/stratosphere/sf/sf_allocation_policies.hpp

@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2018-2020 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+#include <vapours.hpp>
+
+namespace ams::sf {
+
+    namespace impl {
+
+        struct StatelessDummyAllocator;
+
+    }
+
+    template<typename A>
+    class StatelessAllocationPolicy {
+        public:
+            static constexpr bool HasStatefulAllocator = false;
+            using Allocator = impl::StatelessDummyAllocator;
+
+            template<typename>
+            using StatelessAllocator = A;
+
+            template<typename>
+            static void *AllocateAligned(size_t size, size_t align) {
+                return A().Allocate(size);
+            }
+
+            template<typename>
+            static void DeallocateAligned(void *ptr, size_t size, size_t align) {
+                A().Deallocate(ptr, size);
+            }
+    };
+
+    template<template<typename> typename A>
+    class StatelessTypedAllocationPolicy {
+        public:
+            static constexpr bool HasStatefulAllocator = false;
+            using Allocator = impl::StatelessDummyAllocator;
+
+            template<typename T>
+            using StatelessAllocator = A<T>;
+
+            template<typename T>
+            static void *AllocateAligned(size_t size, size_t align) {
+                return StatelessAllocator<T>().Allocate(size);
+            }
+
+            template<typename T>
+            static void DeallocateAligned(void *ptr, size_t size, size_t align) {
+                StatelessAllocator<T>().Deallocate(ptr, size);
+            }
+    };
+
+    template<typename A>
+    class StatefulAllocationPolicy {
+        public:
+            static constexpr bool HasStatefulAllocator = true;
+            using Allocator = A;
+
+            static void *AllocateAligned(Allocator *allocator, size_t size, size_t align) {
+                return allocator->Allocate(size);
+            }
+
+            static void DeallocateAligned(Allocator *allocator, void *ptr, size_t size, size_t align) {
+                allocator->Deallocate(ptr, size);
+            }
+    };
+
+    template<typename T>
+    concept IsStatefulPolicy = T::HasStatefulAllocator;
+
+}