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1 /*
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2 * Copyright 2003 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 ASPSYoungGen : public PSYoungGen {
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26 friend class VMStructs;
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27 private:
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28 size_t _gen_size_limit;
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29 protected:
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30 virtual size_t available_to_live();
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31
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32 public:
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33 ASPSYoungGen(size_t initial_byte_size,
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34 size_t minimum_byte_size,
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35 size_t byte_size_limit);
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36
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37 ASPSYoungGen(PSVirtualSpace* vs,
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38 size_t initial_byte_size,
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39 size_t minimum_byte_size,
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40 size_t byte_size_limit);
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41
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42 void initialize(ReservedSpace rs, size_t alignment);
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43 void initialize_virtual_space(ReservedSpace rs, size_t alignment);
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44
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45 size_t gen_size_limit() { return _gen_size_limit; }
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46 void set_gen_size_limit(size_t v) { _gen_size_limit = v; }
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47
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48 bool resize_generation(size_t eden_size, size_t survivor_size);
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49 void resize_spaces(size_t eden_size, size_t survivor_size);
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50
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51 // Adjust eden to be consistent with the virtual space.
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52 void reset_after_change();
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53
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54 // Adaptive size policy support
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55 // Return number of bytes that the generation can expand/contract.
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56 size_t available_for_expansion();
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57 size_t available_for_contraction();
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58
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59 // Accessors
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60 void set_reserved(MemRegion v) { _reserved = v; }
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61
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62 // Printing support
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63 virtual const char* short_name() const { return "ASPSYoungGen"; }
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64 };
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