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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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