1 /*
   2  * Copyright (c) 2001, 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
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  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
  20  * or visit www.oracle.com if you need additional information or have any
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  24 
  25 #ifndef SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSPERMGEN_HPP
  26 #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSPERMGEN_HPP
  27 
  28 #include "gc_implementation/parallelScavenge/psOldGen.hpp"
  29 
  30 class AdaptivePaddedAverage;
  31 
  32 class PSPermGen : public PSOldGen {
  33   friend class VMStructs;
  34  protected:
  35   AdaptivePaddedAverage* _avg_size;  // Used for sizing
  36   size_t _last_used;                 // Amount used at last GC, used for sizing
  37 
  38  public:
  39   // Initialize the generation.
  40   PSPermGen(ReservedSpace rs, size_t alignment, size_t initial_byte_size,
  41             size_t minimum_byte_size, size_t maximum_byte_size,
  42             const char* gen_name, int level);
  43 
  44   // Permanent Gen special allocation. Uses the OldGen allocation
  45   // routines, which should not be directly called on this generation.
  46   HeapWord* allocate_permanent(size_t word_size);
  47 
  48   // Size calculation.
  49   void compute_new_size(size_t used_before_collection);
  50 
  51   // MarkSweep code
  52   virtual void precompact();
  53 
  54   // Parallel old
  55   virtual void move_and_update(ParCompactionManager* cm);
  56 
  57   virtual const char* name() const { return "PSPermGen"; }
  58 };
  59 
  60 #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSPERMGEN_HPP