1 files changed, 106 insertions, 0 deletions
diff --git a/compiler/ann-ref/src/Memory.h b/compiler/ann-ref/src/Memory.h
new file mode 100644
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+++ b/compiler/ann-ref/src/Memory.h
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+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. All Rights Reserved
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __MEMORY_H__
+#define __MEMORY_H__
+
+#include <cstdint>
+#include <cstddef>
+
+// Represents a memory region.
+struct Memory
+{
+  Memory() = default;
+  virtual ~Memory() = default;
+
+  // Disallow copy semantics to ensure the runtime object can only be freed
+  // once. Copy semantics could be enabled if some sort of reference counting
+  // or deep-copy system for runtime objects is added later.
+  Memory(const Memory &) = delete;
+  Memory &operator=(const Memory &) = delete;
+
+  // Returns a pointer to the underlying memory of this memory object.
+  virtual int getPointer(uint8_t **buffer) const = 0;
+  virtual bool validateSize(uint32_t offset, uint32_t length) const = 0;
+};
+
+class MappedMemory final : public Memory
+{
+public:
+  MappedMemory() = default;
+
+public:
+  ~MappedMemory();
+
+public:
+  // Create the native_handle based on input size, prot, and fd.
+  // Existing native_handle will be deleted, and mHidlMemory will wrap
+  // the newly created native_handle.
+  int set(size_t size, int prot, int fd, size_t offset);
+
+public:
+  int getPointer(uint8_t **buffer) const override;
+  bool validateSize(uint32_t offset, uint32_t length) const override;
+
+private:
+  uint8_t *_base = nullptr;
+  size_t _size = 0;
+};
+
+// Represents a memory region.
+class AllocatedMemory : public Memory
+{
+public:
+  AllocatedMemory() = default;
+  virtual ~AllocatedMemory() = default;
+
+public:
+  virtual int create(uint32_t size) = 0;
+
+public:
+  // Returns a pointer to the underlying memory of this memory object.
+  virtual int getPointer(uint8_t **buffer) const = 0;
+  virtual bool validateSize(uint32_t offset, uint32_t length) const = 0;
+};
+
+class PrivateMemory final : public AllocatedMemory
+{
+public:
+  PrivateMemory() = default;
+  ~PrivateMemory();
+
+public:
+  // Disallow copy semantics to ensure the runtime object can only be freed
+  // once. Copy semantics could be enabled if some sort of reference counting
+  // or deep-copy system for runtime objects is added later.
+  PrivateMemory(const PrivateMemory &) = delete;
+  PrivateMemory &operator=(const PrivateMemory &) = delete;
+
+public:
+  virtual int create(uint32_t size);
+
+public:
+  // Returns a pointer to the underlying memory of this memory object.
+  virtual int getPointer(uint8_t **buffer) const;
+  virtual bool validateSize(uint32_t offset, uint32_t length) const;
+
+private:
+  uint8_t *_base = nullptr;
+  size_t _size = 0;
+};
+
+#endif // __MEMORY_H__