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1 /*
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2 * Copyright 2001-2005 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 class AdaptivePaddedAverage;
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26
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27 class PSPermGen : public PSOldGen {
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28 friend class VMStructs;
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29 protected:
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30 AdaptivePaddedAverage* _avg_size; // Used for sizing
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31 size_t _last_used; // Amount used at last GC, used for sizing
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32
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33 public:
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34 // Initialize the generation.
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35 PSPermGen(ReservedSpace rs, size_t alignment, size_t initial_byte_size,
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36 size_t minimum_byte_size, size_t maximum_byte_size,
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37 const char* gen_name, int level);
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38
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39 // Permanent Gen special allocation. Uses the OldGen allocation
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40 // routines, which should not be directly called on this generation.
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41 HeapWord* allocate_permanent(size_t word_size);
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42
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43 // Size calculation.
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44 void compute_new_size(size_t used_before_collection);
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45
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46 // MarkSweep code
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47 virtual void precompact();
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48
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49 // Parallel old
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50 virtual void move_and_update(ParCompactionManager* cm);
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51
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52 virtual const char* name() const { return "PSPermGen"; }
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53 };
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