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1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2010 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 BASE_REF_COUNTED_MEMORY_H_ | 5 #ifndef BASE_REF_COUNTED_MEMORY_H_ |
6 #define BASE_REF_COUNTED_MEMORY_H_ | 6 #define BASE_REF_COUNTED_MEMORY_H_ |
7 #pragma once | 7 #pragma once |
8 | 8 |
9 #include <vector> | 9 #include <vector> |
10 | 10 |
11 #include "base/ref_counted.h" | 11 #include "base/ref_counted.h" |
12 | 12 |
13 // TODO(erg): The contents of this file should be in a namespace. This would | 13 // TODO(erg): The contents of this file should be in a namespace. This would |
14 // require touching >100 files in chrome/ though. | 14 // require touching >100 files in chrome/ though. |
15 | 15 |
16 // A generic interface to memory. This object is reference counted because one | 16 // A generic interface to memory. This object is reference counted because one |
17 // of its two subclasses own the data they carry, and we need to have | 17 // of its two subclasses own the data they carry, and we need to have |
18 // heterogeneous containers of these two types of memory. | 18 // heterogeneous containers of these two types of memory. |
19 class RefCountedMemory : public base::RefCountedThreadSafe<RefCountedMemory> { | 19 class RefCountedMemory : public base::RefCountedThreadSafe<RefCountedMemory> { |
20 public: | 20 public: |
21 // Retrieves a pointer to the beginning of the data we point to. If the data | 21 // Retrieves a pointer to the beginning of the data we point to. If the data |
22 // is empty, this will return NULL. | 22 // is empty, this will return NULL. |
23 virtual const unsigned char* front() const = 0; | 23 virtual const unsigned char* front() const = 0; |
24 | 24 |
25 // Size of the memory pointed to. | 25 // Size of the memory pointed to. |
26 virtual size_t size() const = 0; | 26 virtual size_t size() const = 0; |
27 | 27 |
28 protected: | 28 protected: |
29 friend class base::RefCountedThreadSafe<RefCountedMemory>; | 29 friend class base::RefCountedThreadSafe<RefCountedMemory>; |
30 | 30 RefCountedMemory(); |
31 virtual ~RefCountedMemory() {} | 31 virtual ~RefCountedMemory(); |
32 }; | 32 }; |
33 | 33 |
34 // An implementation of RefCountedMemory, where the ref counting does not | 34 // An implementation of RefCountedMemory, where the ref counting does not |
35 // matter. | 35 // matter. |
36 class RefCountedStaticMemory : public RefCountedMemory { | 36 class RefCountedStaticMemory : public RefCountedMemory { |
37 public: | 37 public: |
38 RefCountedStaticMemory() | 38 RefCountedStaticMemory() |
39 : data_(NULL), length_(0) {} | 39 : data_(NULL), length_(0) {} |
40 RefCountedStaticMemory(const unsigned char* data, size_t length) | 40 RefCountedStaticMemory(const unsigned char* data, size_t length) |
41 : data_(data), length_(length) {} | 41 : data_(data), length_(length) {} |
(...skipping 29 matching lines...) Expand all Loading... |
71 | 71 |
72 protected: | 72 protected: |
73 friend class base::RefCountedThreadSafe<RefCountedBytes>; | 73 friend class base::RefCountedThreadSafe<RefCountedBytes>; |
74 virtual ~RefCountedBytes(); | 74 virtual ~RefCountedBytes(); |
75 | 75 |
76 private: | 76 private: |
77 DISALLOW_COPY_AND_ASSIGN(RefCountedBytes); | 77 DISALLOW_COPY_AND_ASSIGN(RefCountedBytes); |
78 }; | 78 }; |
79 | 79 |
80 #endif // BASE_REF_COUNTED_MEMORY_H_ | 80 #endif // BASE_REF_COUNTED_MEMORY_H_ |
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