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1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2006-2008 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_THREAD_LOCAL_STORAGE_H_ | 5 #ifndef BASE_THREAD_LOCAL_STORAGE_H_ |
6 #define BASE_THREAD_LOCAL_STORAGE_H_ | 6 #define BASE_THREAD_LOCAL_STORAGE_H_ |
7 | 7 |
8 #include "base/basictypes.h" | 8 #include "base/basictypes.h" |
9 | 9 |
10 #if defined(OS_POSIX) | 10 #if defined(OS_POSIX) |
11 #include <pthread.h> | 11 #include <pthread.h> |
12 #endif | 12 #endif |
13 | 13 |
14 // Wrapper for thread local storage. This class doesn't do much except provide | 14 // Wrapper for thread local storage. This class doesn't do much except provide |
15 // an API for portability. | 15 // an API for portability. |
16 class ThreadLocalStorage { | 16 class ThreadLocalStorage { |
17 public: | 17 public: |
18 | 18 |
19 // Prototype for the TLS destructor function, which can be optionally used to | 19 // Prototype for the TLS destructor function, which can be optionally used to |
20 // cleanup thread local storage on thread exit. 'value' is the data that is | 20 // cleanup thread local storage on thread exit. 'value' is the data that is |
21 // stored in thread local storage. | 21 // stored in thread local storage. |
22 typedef void (*TLSDestructorFunc)(void* value); | 22 typedef void (*TLSDestructorFunc)(void* value); |
23 | 23 |
24 // A key representing one value stored in TLS. | 24 // A key representing one value stored in TLS. |
25 class Slot { | 25 class Slot { |
26 public: | 26 public: |
27 explicit Slot(TLSDestructorFunc destructor = NULL); | 27 Slot(TLSDestructorFunc destructor = NULL); |
28 | 28 |
29 // This constructor should be used for statics. | 29 // This constructor should be used for statics. |
30 // It returns an uninitialized Slot. | 30 // It returns an uninitialized Slot. |
31 explicit Slot(base::LinkerInitialized x) {} | 31 explicit Slot(base::LinkerInitialized x) {} |
32 | 32 |
33 // Set up the TLS slot. Called by the constructor. | 33 // Set up the TLS slot. Called by the constructor. |
34 // 'destructor' is a pointer to a function to perform per-thread cleanup of | 34 // 'destructor' is a pointer to a function to perform per-thread cleanup of |
35 // this object. If set to NULL, no cleanup is done for this TLS slot. | 35 // this object. If set to NULL, no cleanup is done for this TLS slot. |
36 // Returns false on error. | 36 // Returns false on error. |
37 bool Initialize(TLSDestructorFunc destructor); | 37 bool Initialize(TLSDestructorFunc destructor); |
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85 #endif // OS_WIN | 85 #endif // OS_WIN |
86 | 86 |
87 DISALLOW_COPY_AND_ASSIGN(ThreadLocalStorage); | 87 DISALLOW_COPY_AND_ASSIGN(ThreadLocalStorage); |
88 }; | 88 }; |
89 | 89 |
90 // Temporary backwards-compatible name. | 90 // Temporary backwards-compatible name. |
91 // TODO(evanm): replace all usage of TLSSlot. | 91 // TODO(evanm): replace all usage of TLSSlot. |
92 typedef ThreadLocalStorage::Slot TLSSlot; | 92 typedef ThreadLocalStorage::Slot TLSSlot; |
93 | 93 |
94 #endif // BASE_THREAD_LOCAL_STORAGE_H_ | 94 #endif // BASE_THREAD_LOCAL_STORAGE_H_ |
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