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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef MOJO_PUBLIC_CPP_UTILITY_LIB_THREAD_LOCAL_H_ | |
| 6 #define MOJO_PUBLIC_CPP_UTILITY_LIB_THREAD_LOCAL_H_ | |
| 7 | |
| 8 #ifndef _WIN32 | |
| 9 #include <pthread.h> | |
| 10 #endif | |
| 11 | |
| 12 #include "mojo/public/cpp/system/macros.h" | |
| 13 | |
| 14 namespace mojo { | |
| 15 namespace internal { | |
| 16 | |
| 17 // Helper functions that abstract the cross-platform APIs. | |
| 18 struct ThreadLocalPlatform { | |
| 19 #ifdef _WIN32 | |
| 20 typedef unsigned long SlotType; | |
| 21 #else | |
| 22 typedef pthread_key_t SlotType; | |
| 23 #endif | |
| 24 | |
| 25 static void AllocateSlot(SlotType* slot); | |
| 26 static void FreeSlot(SlotType slot); | |
| 27 static void* GetValueFromSlot(SlotType slot); | |
| 28 static void SetValueInSlot(SlotType slot, void* value); | |
| 29 }; | |
| 30 | |
| 31 // This class is intended to be statically allocated. | |
| 32 template <typename P> | |
| 33 class ThreadLocalPointer { | |
| 34 public: | |
| 35 ThreadLocalPointer() : slot_() {} | |
| 36 | |
| 37 void Allocate() { ThreadLocalPlatform::AllocateSlot(&slot_); } | |
| 38 | |
| 39 void Free() { ThreadLocalPlatform::FreeSlot(slot_); } | |
| 40 | |
| 41 P* Get() { | |
| 42 return static_cast<P*>(ThreadLocalPlatform::GetValueFromSlot(slot_)); | |
| 43 } | |
| 44 | |
| 45 void Set(P* value) { ThreadLocalPlatform::SetValueInSlot(slot_, value); } | |
| 46 | |
| 47 private: | |
| 48 ThreadLocalPlatform::SlotType slot_; | |
| 49 }; | |
| 50 | |
| 51 } // namespace internal | |
| 52 } // namespace mojo | |
| 53 | |
| 54 #endif // MOJO_PUBLIC_CPP_UTILITY_LIB_THREAD_LOCAL_H_ | |
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