// Copyright 2010 the V8 project authors. All rights reserved.
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// 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
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//       with the distribution.
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//       from this software without specific prior written permission.
//
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#ifndef V8_VM_STATE_H_
#define V8_VM_STATE_H_

#include "allocation.h"
#include "isolate.h"

namespace v8 {
namespace internal {

template <StateTag Tag>
class VMState BASE_EMBEDDED {
 public:
  explicit inline VMState(Isolate* isolate);
  inline ~VMState();

 private:
  Isolate* isolate_;
  StateTag previous_tag_;
};


class ExternalCallbackScope BASE_EMBEDDED {
 public:
  inline ExternalCallbackScope(Isolate* isolate, Address callback);
  inline ~ExternalCallbackScope();
  Address callback() { return callback_; }
  Address* callback_address() { return &callback_; }
  ExternalCallbackScope* previous() { return previous_scope_; }
  inline Address scope_address();

 private:
  Isolate* isolate_;
  Address callback_;
  ExternalCallbackScope* previous_scope_;
#ifdef USE_SIMULATOR
  Address scope_address_;
#endif
};

} }  // namespace v8::internal


#endif  // V8_VM_STATE_H_
