view src/share/vm/runtime/stackValueCollection.hpp @ 1145:e018e6884bd8

6631166: CMS: better heuristics when combatting fragmentation Summary: Autonomic per-worker free block cache sizing, tunable coalition policies, fixes to per-size block statistics, retuned gain and bandwidth of some feedback loop filters to allow quicker reactivity to abrupt changes in ambient demand, and other heuristics to reduce fragmentation of the CMS old gen. Also tightened some assertions, including those related to locking. Reviewed-by: jmasa
author ysr
date Wed, 23 Dec 2009 09:23:54 -0800
parents a61af66fc99e
children c18cbe5936b8
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/*
 * Copyright 2001-2002 Sun Microsystems, Inc.  All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 *
 */

class StackValueCollection : public ResourceObj {
 private:
  GrowableArray<StackValue*>* _values;

 public:
  StackValueCollection()            { _values = new GrowableArray<StackValue*>(); }
  StackValueCollection(int length)  { _values = new GrowableArray<StackValue*>(length); }

  void add(StackValue *val) const   { _values->push(val); }
  int  size() const                 { return _values->length(); }
  bool is_empty() const             { return (size() == 0); }
  StackValue* at(int i) const       { return _values->at(i); }

  // Get typed locals/expressions
  jint  int_at(int slot) const;
  jlong long_at(int slot) const;
  Handle obj_at(int slot) const;
  jfloat  float_at(int slot) const;
  jdouble double_at(int slot) const;

  // Set typed locals/expressions
  void set_int_at(int slot, jint value);
  void set_long_at(int slot, jlong value);
  void set_obj_at(int slot, Handle value);
  void set_float_at(int slot, jfloat value);
  void set_double_at(int slot, jdouble value);

  void print();
};