| /* |
| * Copyright (C) 2009 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef ThreadIdentifierDataPthreads_h |
| #define ThreadIdentifierDataPthreads_h |
| |
| #if defined(__LB_SHELL__) |
| #include <map> |
| #include <wtf/ThreadingPrimitives.h> |
| #endif |
| #include <wtf/Threading.h> |
| |
| namespace WTF { |
| |
| // Holds ThreadIdentifier in the thread-specific storage and employs pthreads-specific 2-pass destruction to reliably remove |
| // ThreadIdentifier from threadMap. It assumes regular ThreadSpecific types don't use multiple-pass destruction. |
| class ThreadIdentifierData { |
| WTF_MAKE_NONCOPYABLE(ThreadIdentifierData); |
| public: |
| ~ThreadIdentifierData(); |
| |
| // One time initialization for this class as a whole. |
| // This method must be called before initialize() and it is not thread-safe. |
| static void initializeOnce(); |
| |
| // Creates and puts an instance of ThreadIdentifierData into thread-specific storage. |
| static void initialize(ThreadIdentifier identifier); |
| |
| // Returns 0 if thread-specific storage was not initialized. |
| static ThreadIdentifier identifier(); |
| |
| private: |
| ThreadIdentifierData(ThreadIdentifier identifier) |
| : m_identifier(identifier) |
| , m_isDestroyedOnce(false) |
| { |
| } |
| |
| #if defined(__LB_SHELL__) |
| static std::map<ThreadIdentifier, ThreadIdentifierData*> local_handle; |
| static Mutex lock_local_handle; |
| #endif |
| |
| // This thread-specific destructor is called 2 times when thread terminates: |
| // - first, when all the other thread-specific destructors are called, it simply remembers it was 'destroyed once' |
| // and re-sets itself into the thread-specific slot to make Pthreads to call it again later. |
| // - second, after all thread-specific destructors were invoked, it gets called again - this time, we remove the |
| // ThreadIdentifier from the threadMap, completing the cleanup. |
| static void destruct(void* data); |
| |
| ThreadIdentifier m_identifier; |
| bool m_isDestroyedOnce; |
| static pthread_key_t m_key; |
| }; |
| |
| } // namespace WTF |
| |
| #endif // ThreadIdentifierDataPthreads_h |
| |
| |