OLD | NEW |
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 BASE_POSIX_GLOBAL_DESCRIPTORS_H_ | 5 #ifndef BASE_POSIX_GLOBAL_DESCRIPTORS_H_ |
6 #define BASE_POSIX_GLOBAL_DESCRIPTORS_H_ | 6 #define BASE_POSIX_GLOBAL_DESCRIPTORS_H_ |
7 | 7 |
8 #include "build/build_config.h" | 8 #include "build/build_config.h" |
9 | 9 |
10 #include <vector> | 10 #include <vector> |
(...skipping 23 matching lines...) Expand all Loading... |
34 // need to define keys, then values should be chosen randomly so as not to | 34 // need to define keys, then values should be chosen randomly so as not to |
35 // collide. | 35 // collide. |
36 class BASE_EXPORT GlobalDescriptors { | 36 class BASE_EXPORT GlobalDescriptors { |
37 public: | 37 public: |
38 typedef uint32_t Key; | 38 typedef uint32_t Key; |
39 typedef std::pair<Key, int> KeyFDPair; | 39 typedef std::pair<Key, int> KeyFDPair; |
40 typedef std::vector<KeyFDPair> Mapping; | 40 typedef std::vector<KeyFDPair> Mapping; |
41 | 41 |
42 // Often we want a canonical descriptor for a given Key. In this case, we add | 42 // Often we want a canonical descriptor for a given Key. In this case, we add |
43 // the following constant to the key value: | 43 // the following constant to the key value: |
| 44 #if !defined(OS_ANDROID) |
44 static const int kBaseDescriptor = 3; // 0, 1, 2 are already taken. | 45 static const int kBaseDescriptor = 3; // 0, 1, 2 are already taken. |
| 46 #else |
| 47 static const int kBaseDescriptor = 4; // 3 used by __android_log_write(). |
| 48 #endif |
45 | 49 |
46 // Return the singleton instance of GlobalDescriptors. | 50 // Return the singleton instance of GlobalDescriptors. |
47 static GlobalDescriptors* GetInstance(); | 51 static GlobalDescriptors* GetInstance(); |
48 | 52 |
49 // Get a descriptor given a key. It is a fatal error if the key is not known. | 53 // Get a descriptor given a key. It is a fatal error if the key is not known. |
50 int Get(Key key) const; | 54 int Get(Key key) const; |
51 | 55 |
52 // Get a descriptor give a key. Returns -1 on error. | 56 // Get a descriptor give a key. Returns -1 on error. |
53 int MaybeGet(Key key) const; | 57 int MaybeGet(Key key) const; |
54 | 58 |
55 // Set the descriptor for the given key. | 59 // Set the descriptor for the given key. |
56 void Set(Key key, int fd); | 60 void Set(Key key, int fd); |
57 | 61 |
58 void Reset(const Mapping& mapping); | 62 void Reset(const Mapping& mapping); |
59 | 63 |
60 private: | 64 private: |
61 friend struct DefaultSingletonTraits<GlobalDescriptors>; | 65 friend struct DefaultSingletonTraits<GlobalDescriptors>; |
62 GlobalDescriptors(); | 66 GlobalDescriptors(); |
63 ~GlobalDescriptors(); | 67 ~GlobalDescriptors(); |
64 | 68 |
65 Mapping descriptors_; | 69 Mapping descriptors_; |
66 }; | 70 }; |
67 | 71 |
68 } // namespace base | 72 } // namespace base |
69 | 73 |
70 #endif // BASE_POSIX_GLOBAL_DESCRIPTORS_H_ | 74 #endif // BASE_POSIX_GLOBAL_DESCRIPTORS_H_ |
OLD | NEW |