Reduce TLS overhead in v8::TryCatch.

include/v8.h

 // Copyright 2011 the V8 project authors. 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
@@ skipping 3241 matching lines @@
   void SetVerbose(bool value);
 
   /**
    * Set whether or not this TryCatch should capture a Message object
    * which holds source information about where the exception
    * occurred.  True by default.
    */
   void SetCaptureMessage(bool value);
 
  private:
+  v8::internal::Isolate* isolate_;

[Vyacheslav Egorov (Chromium), 2011/06/07 14:58:26]

I think it's the first time when we actually use value of type
v8::internal::Isolate* in the v8.h.

Maybe we should use void* instead?

[Vitaly Repeshko, 2011/06/07 15:01:30]

We already use it in a few places. It doesn't really expose much since it's just
a pointer.

   void* next_;
   void* exception_;
   void* message_;
   bool is_verbose_ : 1;
   bool can_continue_ : 1;
   bool capture_message_ : 1;
   bool rethrow_ : 1;
 
   friend class v8::internal::Isolate;
 };
@@ skipping 865 matching lines @@
 
 
 }  // namespace v8
 
 
 #undef V8EXPORT
 #undef TYPE_CHECK
 
 
 #endif  // V8_H_