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| 1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 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 // WARNING: Thread local storage is a bit tricky to get right. Please make | 5 // WARNING: Thread local storage is a bit tricky to get right. Please make |
| 6 // sure that this is really the proper solution for what you're trying to | 6 // sure that this is really the proper solution for what you're trying to |
| 7 // achieve. Don't prematurely optimize, most likely you can just use a Lock. | 7 // achieve. Don't prematurely optimize, most likely you can just use a Lock. |
| 8 // | 8 // |
| 9 // These classes implement a wrapper around the platform's TLS storage | 9 // These classes implement a wrapper around the platform's TLS storage |
| 10 // mechanism. On construction, they will allocate a TLS slot, and free the | 10 // mechanism. On construction, they will allocate a TLS slot, and free the |
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| 41 // | 41 // |
| 42 // // Return the current MyClass associated with the calling thread, can be | 42 // // Return the current MyClass associated with the calling thread, can be |
| 43 // // NULL if there isn't a MyClass associated. | 43 // // NULL if there isn't a MyClass associated. |
| 44 // MyClass* MyClass::current() { | 44 // MyClass* MyClass::current() { |
| 45 // return Singleton<ThreadLocalPointer<MyClass> >::get()->Get(); | 45 // return Singleton<ThreadLocalPointer<MyClass> >::get()->Get(); |
| 46 // } | 46 // } |
| 47 | 47 |
| 48 #ifndef MOJO_PUBLIC_UTILITY_THREAD_LOCAL_H_ | 48 #ifndef MOJO_PUBLIC_UTILITY_THREAD_LOCAL_H_ |
| 49 #define MOJO_PUBLIC_UTILITY_THREAD_LOCAL_H_ | 49 #define MOJO_PUBLIC_UTILITY_THREAD_LOCAL_H_ |
| 50 | 50 |
| 51 #include "build/build_config.h" | 51 #ifndef _WIN32 |
| 52 | |
| 53 #if defined(OS_POSIX) | |
| 54 #include <pthread.h> | 52 #include <pthread.h> |
| 55 #endif | 53 #endif |
| 56 | 54 |
| 57 #include "mojo/public/system/macros.h" | 55 #include "mojo/public/system/macros.h" |
| 58 | 56 |
| 59 namespace mojo { | 57 namespace mojo { |
| 60 namespace internal { | 58 namespace internal { |
| 61 | 59 |
| 62 // Helper functions that abstract the cross-platform APIs. Do not use directly. | 60 // Helper functions that abstract the cross-platform APIs. Do not use directly. |
| 63 struct ThreadLocalPlatform { | 61 struct ThreadLocalPlatform { |
| 64 #if defined(OS_WIN) | 62 #ifdef _WIN32 |
| 65 typedef unsigned long SlotType; | 63 typedef unsigned long SlotType; |
| 66 #elif defined(OS_POSIX) | 64 #else |
| 67 typedef pthread_key_t SlotType; | 65 typedef pthread_key_t SlotType; |
| 68 #endif | 66 #endif |
| 69 | 67 |
| 70 static void AllocateSlot(SlotType* slot); | 68 static void AllocateSlot(SlotType* slot); |
| 71 static void FreeSlot(SlotType slot); | 69 static void FreeSlot(SlotType slot); |
| 72 static void* GetValueFromSlot(SlotType slot); | 70 static void* GetValueFromSlot(SlotType slot); |
| 73 static void SetValueInSlot(SlotType slot, void* value); | 71 static void SetValueInSlot(SlotType slot, void* value); |
| 74 }; | 72 }; |
| 75 | 73 |
| 76 } // namespace internal | 74 } // namespace internal |
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| 119 | 117 |
| 120 private: | 118 private: |
| 121 ThreadLocalPointer<void> tlp_; | 119 ThreadLocalPointer<void> tlp_; |
| 122 | 120 |
| 123 MOJO_DISALLOW_COPY_AND_ASSIGN(ThreadLocalBoolean); | 121 MOJO_DISALLOW_COPY_AND_ASSIGN(ThreadLocalBoolean); |
| 124 }; | 122 }; |
| 125 | 123 |
| 126 } // namespace mojo | 124 } // namespace mojo |
| 127 | 125 |
| 128 #endif // MOJO_PUBLIC_UTILITY_THREAD_LOCAL_H_ | 126 #endif // MOJO_PUBLIC_UTILITY_THREAD_LOCAL_H_ |
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