vframeOop.hpp

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/* Copyright 1996 LongView Technologies L.L.C. $Revision: 1.2 $ */
/* Copyright (c) 2006, Sun Microsystems, 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.
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          disclaimer in the documentation and/or other materials provided with the distribution.
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// vframe objects are handles to process activations.

// memory layout:
//    [header      ]
//    [klass_field ]
//    [process     ]
//    [index       ]
//    [timestamp   ]

class vframeOopDesc: public memOopDesc {
 private:
  processOop _process;
  smiOop     _index;
  smiOop     _time_stamp;

 protected:
  vframeOopDesc* addr() const { return (vframeOopDesc*)memOopDesc::addr(); }

 public:
  // accessors
  processOop process() const            { return addr()->_process; }
  void set_process(processOop p)        { STORE_OOP(&addr()->_process,p);}

  int index() const                     { return addr()->_index->value(); }
  void set_index(int i)                 { STORE_OOP(&addr()->_index, as_smiOop(i)); }

  int time_stamp() const                { return addr()->_time_stamp->value(); }
  void set_time_stamp(int t)            { STORE_OOP(&addr()->_time_stamp, as_smiOop(t)); }

  friend vframeOop as_vframeOop(void* p) { return vframeOop(as_memOop(p)); }

  // sizing
  static int header_size() { return sizeof(vframeOopDesc)/oopSize; }

  // get the corresponding vframe, returns NULL it fails.
  vframe* get_vframe();

 private:
   friend vframeKlass;
};


;

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