snapshot.hpp

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/* Copyright 1994, 1995 LongView Technologies L.L.C. $Revision: 1.1 $ */
/* 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.
    * 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 with the distribution.
    * Neither the name of Sun Microsystems nor the names of its contributors may be used to endorse or promote products derived 
          from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT 
NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 
THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
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*/


// SnapshotDesc is the class handling readin and writing of snapshots

class SnapshotDesc : StackObj {
 private:
  FILE* file;
  bool  _has_error;

  // HEADER
  void read_header();
  void write_header();

  void read_sizes();
  void write_sizes();  

  void read_revision();
  void write_revision();

  // ROOTS
  void read_roots();
  void write_roots();

  // OBJECTS
  void read_spaces();
  void write_spaces();

  // ZONE
  void read_zone();
  void write_zone();

 public:
  void read_from(char* name);
  void write_on(char* name);

  bool has_error() { return _has_error; }
  symbolOop error_symbol();

  void error(char* msg);

  friend class WriteClosure;
  friend class ReadClosure;
};

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