1 /*
   2  * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
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  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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  24 
  25 #ifndef SHARE_VM_MEMORY_COMPACTPERMGEN_HPP
  26 #define SHARE_VM_MEMORY_COMPACTPERMGEN_HPP
  27 
  28 #include "memory/generation.hpp"
  29 #include "memory/permGen.hpp"
  30 
  31 class ContigPermSpace;
  32 class CardTableModRefBS;
  33 class CompactingPermGenGen;
  34 class PermanentGenerationSpec;
  35 
  36 // A PermGen implemented with a contiguous space.
  37 class CompactingPermGen:  public PermGen {
  38   friend class VMStructs;
  39 protected:
  40   // The "generation" view.
  41   OneContigSpaceCardGeneration* _gen;
  42 
  43 public:
  44   CompactingPermGen(ReservedSpace rs, ReservedSpace shared_rs,
  45                     size_t initial_byte_size, GenRemSet* remset,
  46                     PermanentGenerationSpec* perm_spec);
  47 
  48   HeapWord* mem_allocate(size_t size);
  49 
  50   void compute_new_size();
  51 
  52   Generation* as_gen() const { return _gen; }
  53 
  54 };
  55 
  56 #endif // SHARE_VM_MEMORY_COMPACTPERMGEN_HPP