lmem: Implement UnitHeap, ExpHeap (#823)

* lmem: implement ExpHeap

* lmem: Implement Slab^H^H^H^HUnitHeap

libraries/libstratosphere/include/stratosphere/lmem/lmem_common.hpp

@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2018-2019 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>
+#include "impl/lmem_impl_common.hpp"
+
+namespace ams::lmem {
+
+    enum CreateOption {
+        CreateOption_None       = (0),
+        CreateOption_ZeroClear  = (1 << 0),
+        CreateOption_DebugFill  = (1 << 1),
+        CreateOption_ThreadSafe = (1 << 2),
+    };
+
+    enum FillType {
+        FillType_Unallocated,
+        FillType_Allocated,
+        FillType_Freed,
+        FillType_Count,
+    };
+
+    namespace impl {
+
+        struct HeapHead;
+
+    }
+
+    using HeapHandle = impl::HeapHead *;
+
+    using HeapCommonHead = impl::HeapHead;
+
+    struct MemoryRange {
+        uintptr_t address;
+        size_t size;
+    };
+
+    constexpr inline s32 DefaultAlignment = 0x8;
+
+    /* Common API. */
+    u32  GetDebugFillValue(FillType fill_type);
+    void SetDebugFillValue(FillType fill_type, u32 value);
+
+    size_t GetTotalSize(HeapHandle handle);
+    void *GetStartAddress(HeapHandle handle);
+    bool ContainsAddress(HeapHandle handle, const void *address);
+
+}