| // Copyright 2015 Google Inc. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #ifndef STARBOARD_SHARED_STARBOARD_THREAD_LOCAL_STORAGE_INTERNAL_H_ |
| #define STARBOARD_SHARED_STARBOARD_THREAD_LOCAL_STORAGE_INTERNAL_H_ |
| |
| #include "starboard/common/scoped_ptr.h" |
| #include "starboard/mutex.h" |
| #include "starboard/shared/internal_only.h" |
| #include "starboard/thread.h" |
| |
| namespace starboard { |
| namespace shared { |
| |
| class TLSKeyManager { |
| public: |
| static TLSKeyManager* Get(); |
| |
| TLSKeyManager(); |
| |
| // Returns a unique ID that acts as a new key for a thread local storage |
| // value. |
| SbThreadLocalKey CreateKey(SbThreadLocalDestructor destructor); |
| |
| // Destroys the specified key, making its ID available for re-use in a |
| // subsequent call to AllocateKey(). |
| void DestroyKey(SbThreadLocalKey key); |
| |
| // Sets the thread local value for the given key. |
| bool SetLocalValue(SbThreadLocalKey key, void* value); |
| |
| // Returns the thread local value for the given key. |
| void* GetLocalValue(SbThreadLocalKey key); |
| |
| // Called whenever a thread is created. |
| void InitializeTLSForThread(); |
| |
| // Called whenever a thread is destroyed. |
| void ShutdownTLSForThread(); |
| |
| private: |
| // We add 1 to SB_MAX_THREADS here to account for the main thread. |
| static const int kMaxThreads = SB_MAX_THREADS + 1; |
| struct KeyRecord { |
| bool valid; |
| SbThreadLocalDestructor destructor; |
| void* values[kMaxThreads]; |
| }; |
| |
| // Sets up the specified key. |
| int GetUnusedKeyIndex(); |
| |
| // Returns true if the given key is a valid, current unique TLS ID. Active |
| // means it has been allocated via AllocateKey() but has not yet been |
| // destroyed via DestroyKey(). |
| bool IsKeyActive(SbThreadLocalKey key); |
| |
| // Returns the TLS ID of the current thread, used for indexing into |
| // KeyRecord::values. |
| int GetCurrentThreadId(); |
| |
| // Access to the class members below are protected by this mutex so that they |
| // can be updated by any thread at any time. |
| Mutex mutex_; |
| |
| struct InternalData; |
| scoped_ptr<InternalData> data_; |
| }; |
| |
| } // namespace shared |
| } // namespace starboard |
| |
| #endif // STARBOARD_SHARED_STARBOARD_THREAD_LOCAL_STORAGE_INTERNAL_H_ |