1 /*
2  * Copyright (C) 2017 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #pragma once
18 
19 #include "common.h"
20 
21 #include <assert.h>
22 #include <stdlib.h>
23 
24 namespace slicer {
25 
26 // A shallow, non-owning reference to a "view" inside a memory buffer
27 class MemView {
28  public:
MemView()29   MemView() : ptr_(nullptr), size_(0) {}
30 
MemView(const void * ptr,size_t size)31   MemView(const void* ptr, size_t size) : ptr_(ptr), size_(size) {
32     assert(size > 0);
33   }
34 
35   ~MemView() = default;
36 
37   template <class T = void>
ptr()38   const T* ptr() const {
39     return static_cast<const T*>(ptr_);
40   }
41 
size()42   size_t size() const { return size_; }
43 
44  private:
45   const void* ptr_;
46   size_t size_;
47 };
48 
49 } // namespace slicer
50 
51