Make ThreadLocalStorage more posix pthread compliant

base/threading/thread_local_storage.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef BASE_THREADING_THREAD_LOCAL_STORAGE_H_
 #define BASE_THREADING_THREAD_LOCAL_STORAGE_H_
 #pragma once
 
+#include "base/atomicops.h"
 #include "base/base_export.h"
 #include "base/basictypes.h"
 
 #if defined(OS_POSIX)
 #include <pthread.h>
 #endif
 
 namespace base {
 
 // Wrapper for thread local storage.  This class doesn't do much except provide
@@ skipping 53 matching lines @@
   // Function called when on thread exit to call TLS
   // destructor functions.  This function is used internally.
   static void ThreadExit();
 
  private:
   // Function to lazily initialize our thread local storage.
   static void **Initialize();
 
  private:
   // The maximum number of 'slots' in our thread local storage stack.
-  // For now, this is fixed.  We could either increase statically, or
-  // we could make it dynamic in the future.
   static const int kThreadLocalStorageSize = 64;
 
+  // The maximum number of times to try to clear slots by caling destructors.
+  // Use pthread naming convention for clarity.
+  static const int PTHREAD_DESTRUCTOR_ITERATIONS = kThreadLocalStorageSize;
+
   static long tls_key_;
   static long tls_max_;
-  static TLSDestructorFunc tls_destructors_[kThreadLocalStorageSize];
+  static subtle::AtomicWord tls_destructors_[kThreadLocalStorageSize];
 #endif  // OS_WIN
 
   DISALLOW_COPY_AND_ASSIGN(ThreadLocalStorage);
 };
 
 }  // namespace base
 
 #endif  // BASE_THREADING_THREAD_LOCAL_STORAGE_H_