duke@435: /*
stefank@2314:  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
duke@435:  *
duke@435:  */
duke@435: 
stefank@2314: #ifndef SHARE_VM_GC_IMPLEMENTATION_CONCURRENTMARKSWEEP_CMSPERMGEN_HPP
stefank@2314: #define SHARE_VM_GC_IMPLEMENTATION_CONCURRENTMARKSWEEP_CMSPERMGEN_HPP
stefank@2314: 
stefank@2314: #include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.hpp"
stefank@2314: #include "memory/permGen.hpp"
stefank@2314: 
duke@435: class CardTableRS;   // fwd decl
duke@435: class ConcurrentMarkSweepGeneration;
duke@435: 
duke@435: // A PermGen implemented with a CMS space, collected by a CMS collector.
duke@435: class CMSPermGen:  public PermGen {
duke@435:   friend class VMStructs;
duke@435: 
duke@435:  protected:
duke@435:   // The "generation" view.
duke@435:   ConcurrentMarkSweepGeneration* _gen;
duke@435: 
ysr@2194:   // Override default implementation from PermGen
ysr@2194:   virtual HeapWord* request_expand_and_allocate(Generation* gen, size_t size,
ysr@2194:                                                 GCCause::Cause prev_cause);
ysr@2194: 
duke@435:  public:
duke@435:   CMSPermGen(ReservedSpace rs, size_t initial_byte_size,
duke@435:              CardTableRS* ct, FreeBlockDictionary::DictionaryChoice);
duke@435: 
duke@435:   HeapWord* mem_allocate(size_t size);
duke@435: 
duke@435:   void compute_new_size();
duke@435: 
duke@435:   Generation* as_gen() const { return _gen; }
duke@435: };
duke@435: 
duke@435: // This is the "generation" view of a CMSPermGen.
duke@435: class CMSPermGenGen: public ConcurrentMarkSweepGeneration {
duke@435:   // Abstractly, this is a subtype that gets access to protected fields.
duke@435:   friend class CMSPermGen;
duke@435: public:
duke@435:   CMSPermGenGen(ReservedSpace rs, size_t initial_byte_size,
duke@435:                        int level, CardTableRS* ct):
duke@435:     // See comments in the constructor for CompactibleFreeListSpace
duke@435:     // regarding not using adaptive free lists for a perm gen.
duke@435:     ConcurrentMarkSweepGeneration(rs, initial_byte_size, // MinPermHeapExapnsion
duke@435:       level, ct, false /* use adaptive freelists */,
duke@435:       (FreeBlockDictionary::DictionaryChoice)CMSDictionaryChoice)
duke@435:   {}
duke@435: 
duke@435:   void initialize_performance_counters();
duke@435: 
duke@435:   const char* name() const {
duke@435:     return "concurrent-mark-sweep perm gen";
duke@435:   }
duke@435: 
duke@435:   const char* short_name() const {
duke@435:     return "CMS Perm";
duke@435:   }
duke@435: 
duke@435:   bool must_be_youngest() const { return false; }
duke@435:   bool must_be_oldest() const { return false; }
duke@435: };
stefank@2314: 
stefank@2314: #endif // SHARE_VM_GC_IMPLEMENTATION_CONCURRENTMARKSWEEP_CMSPERMGEN_HPP