Use TLS storage for thread ids in wtf/ThreadingPThreads

third_party/WebKit/Source/wtf/WTFThreadData.h

 /*
  * Copyright (C) 2008 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 35 matching lines @@
   WTF_MAKE_NONCOPYABLE(WTFThreadData);
 
  public:
   WTFThreadData();
   ~WTFThreadData();
 
   AtomicStringTable& getAtomicStringTable() { return *m_atomicStringTable; }
 
   ICUConverterWrapper& cachedConverterICU() { return *m_cachedConverterICU; }
 
+  ThreadIdentifier threadId() { return m_threadId; }

[esprehn, 2017/01/12 19:38:49]

const

[Charlie Harrison, 2017/01/12 19:44:33]

Done.

+
  private:
   std::unique_ptr<AtomicStringTable> m_atomicStringTable;
   std::unique_ptr<ICUConverterWrapper> m_cachedConverterICU;
 
+  ThreadIdentifier m_threadId;
+
   static ThreadSpecific<WTFThreadData>* staticData;
   friend WTFThreadData& wtfThreadData();
 };
 
 inline WTFThreadData& wtfThreadData() {
   // WTFThreadData is used on main thread before it could possibly be used
   // on secondary ones, so there is no need for synchronization here.
   if (!WTFThreadData::staticData)
     WTFThreadData::staticData = new ThreadSpecific<WTFThreadData>;
   return **WTFThreadData::staticData;
 }
 
 }  // namespace WTF
 
 using WTF::WTFThreadData;
 using WTF::wtfThreadData;
 
 #endif  // WTFThreadData_h