[Interp] Introduce Buffer class (#5401)

* [Interp] Introduce Buffer class

Introduce Buffer class to handle writable data area
- Allocate internally
- Comes from outside (ex. model output)

Signed-off-by: Hyeongseok Oh <hseok82.oh@samsung.com>
* Fix comment, include guard and add const function keyword

diff --git a/runtimes/neurun/core/src/exec/interp/Buffer.h b/runtimes/neurun/core/src/exec/interp/Buffer.h
new file mode 100644 (file)
index 0000000..3528e08
--- /dev/null
+++ b/runtimes/neurun/core/src/exec/interp/Buffer.h
@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 2019 Samsung Electronics Co., Ltd. All Rights Reserved
+ *
+ * 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.
+ */
+
+/**
+ * @file  Buffer.h
+ * @brief This file contains Buffer interface and InternalBuffer, ExternalBuffer class
+ */
+#ifndef __NEURUN_EXEC_INTERP_BUFFER_H__
+#define __NEURUN_EXEC_INTERP_BUFFER_H__
+
+#include <cpp14/memory.h>
+
+#include "model/Data.h"
+
+namespace neurun
+{
+namespace exec
+{
+namespace interp
+{
+
+/**
+ * @brief Interface for writable data area
+ */
+class Buffer : public model::Data
+{
+public:
+  /**
+   * @brief   Return writable pointer for data area
+   * @return  Writable pointer
+   */
+  virtual uint8_t *baseWritable(void) const = 0;
+};
+
+/**
+ * @brief Class for internally allocated data area
+ */
+class InternalBuffer final : public Buffer
+{
+public:
+  InternalBuffer(size_t size) : _base{nnfw::cpp14::make_unique<uint8_t[]>(size)}, _size{size}
+  {
+    // DO NOTHING
+  }
+
+public:
+  size_t size(void) const override { return _size; }
+  const uint8_t *base(void) const override { return _base.get(); }
+  uint8_t *baseWritable(void) const override { return _base.get(); }
+
+private:
+  std::unique_ptr<uint8_t[]> _base;
+  size_t _size;
+};
+
+/**
+ * @brief Class for data area from outside
+ */
+class ExternalBuffer final : public Buffer
+{
+public:
+  ExternalBuffer(uint8_t *base, size_t size) : _base{base}, _size{size}
+  {
+    // DO NOTHING
+  }
+
+public:
+  size_t size(void) const override { return _size; }
+  const uint8_t *base(void) const override { return _base; }
+  uint8_t *baseWritable(void) const override { return _base; }
+
+private:
+  uint8_t *_base;
+  size_t _size;
+};
+
+} // namespace interp
+} // namespace exec
+} // namespace neurun
+
+#endif // __NEURUN_EXEC_INTERP_BUFFER_H__