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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef REMOTING_BASE_TYPED_BUFFER_H_ | 5 #ifndef REMOTING_BASE_TYPED_BUFFER_H_ |
6 #define REMOTING_BASE_TYPED_BUFFER_H_ | 6 #define REMOTING_BASE_TYPED_BUFFER_H_ |
7 | 7 |
8 #include <assert.h> | 8 #include <assert.h> |
9 | 9 |
10 #include <algorithm> | 10 #include <algorithm> |
11 | 11 |
12 #include "base/basictypes.h" | 12 #include "base/basictypes.h" |
| 13 #include "base/logging.h" |
13 #include "base/move.h" | 14 #include "base/move.h" |
14 | 15 |
15 namespace remoting { | 16 namespace remoting { |
16 | 17 |
17 // A scoper for a variable-length structure such as SID, SECURITY_DESCRIPTOR and | 18 // A scoper for a variable-length structure such as SID, SECURITY_DESCRIPTOR and |
18 // similar. These structures typically consist of a header followed by variable- | 19 // similar. These structures typically consist of a header followed by variable- |
19 // length data, so the size may not match sizeof(T). The class supports | 20 // length data, so the size may not match sizeof(T). The class supports |
20 // move-only semantics and typed buffer getters. | 21 // move-only semantics and typed buffer getters. |
21 template <typename T> | 22 template <typename T> |
22 class TypedBuffer { | 23 class TypedBuffer { |
23 MOVE_ONLY_TYPE_FOR_CPP_03(TypedBuffer, RValue) | 24 MOVE_ONLY_TYPE_FOR_CPP_03(TypedBuffer) |
24 | 25 |
25 public: | 26 public: |
26 TypedBuffer() : buffer_(NULL), length_(0) { | 27 TypedBuffer() : TypedBuffer(0) {} |
27 } | |
28 | 28 |
29 // Creates an instance of the object allocating a buffer of the given size. | 29 // Creates an instance of the object allocating a buffer of the given size. |
30 explicit TypedBuffer(uint32 length) : buffer_(NULL), length_(length) { | 30 explicit TypedBuffer(uint32 length) : buffer_(NULL), length_(length) { |
31 if (length_ > 0) | 31 if (length_ > 0) |
32 buffer_ = reinterpret_cast<T*>(new uint8[length_]); | 32 buffer_ = reinterpret_cast<T*>(new uint8[length_]); |
33 } | 33 } |
34 | 34 |
35 // Move constructor for C++03 move emulation of this type. | 35 TypedBuffer(TypedBuffer&& rvalue) : TypedBuffer() { Swap(rvalue); } |
36 TypedBuffer(RValue rvalue) : buffer_(NULL), length_(0) { | |
37 TypedBuffer temp; | |
38 temp.Swap(*rvalue.object); | |
39 Swap(temp); | |
40 } | |
41 | 36 |
42 ~TypedBuffer() { | 37 ~TypedBuffer() { |
43 if (buffer_) { | 38 if (buffer_) { |
44 delete[] reinterpret_cast<uint8*>(buffer_); | 39 delete[] reinterpret_cast<uint8*>(buffer_); |
45 buffer_ = NULL; | 40 buffer_ = NULL; |
46 } | 41 } |
47 } | 42 } |
48 | 43 |
49 // Move operator= for C++03 move emulation of this type. | 44 TypedBuffer& operator=(TypedBuffer&& rvalue) { |
50 TypedBuffer& operator=(RValue rvalue) { | 45 Swap(rvalue); |
51 TypedBuffer temp; | |
52 temp.Swap(*rvalue.object); | |
53 Swap(temp); | |
54 return *this; | 46 return *this; |
55 } | 47 } |
56 | 48 |
57 // Accessors to get the owned buffer. | 49 // Accessors to get the owned buffer. |
58 // operator* and operator-> will assert() if there is no current buffer. | 50 // operator* and operator-> will assert() if there is no current buffer. |
59 T& operator*() const { | 51 T& operator*() const { |
60 assert(buffer_ != NULL); | 52 assert(buffer_ != NULL); |
61 return *buffer_; | 53 return *buffer_; |
62 } | 54 } |
63 T* operator->() const { | 55 T* operator->() const { |
(...skipping 25 matching lines...) Expand all Loading... |
89 // Points to the owned buffer. | 81 // Points to the owned buffer. |
90 T* buffer_; | 82 T* buffer_; |
91 | 83 |
92 // Length of the owned buffer in bytes. | 84 // Length of the owned buffer in bytes. |
93 uint32 length_; | 85 uint32 length_; |
94 }; | 86 }; |
95 | 87 |
96 } // namespace remoting | 88 } // namespace remoting |
97 | 89 |
98 #endif // REMOTING_BASE_TYPED_BUFFER_H_ | 90 #endif // REMOTING_BASE_TYPED_BUFFER_H_ |
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