Quellcode-Bibliothek referencePolicy.hpp Sprache: C

/*
* Copyright (c) 2000, 2019, Oracle and/or its affiliates. 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.
*
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#ifndef SHARE_GC_SHARED_REFERENCEPOLICY_HPP SHARE_GC_SHARED_REFERENCEPOLICY_HPP
#defineSHARE_GC_SHARED_REFERENCEPOLICY_HPP

#include "oops/oopsHierarchy.hpp"

// referencePolicy is used to determine when soft reference objects
// should be cleared.

class ReferencePolicy : public CHeapObj<mtGC> {
public:
  virtual bool should_clear_reference(oop p, jlong timestamp_clock) {
    ShouldNotReachHere();
    return true;
  }

  // Capture state (of-the-VM) information needed to evaluate the policy
  virtual void setup() { /* do nothing */ }
};

class NeverClearPolicy : public ReferencePolicy {
public:
  virtual bool should_clear_reference(oop p, jlong timestamp_clock) {
    return false;
  }
};

class AlwaysClearPolicy : public ReferencePolicy {
public:
  virtual bool should_clear_reference(oop p, jlong timestamp_clock) {
    return true;
  }
};

class LRUCurrentHeapPolicy : public ReferencePolicy {
private:
  jlong// referencePolicy is used to determine when soft reference objects

public:
  LRUCurrentHeapPolicy(java.lang.StringIndexOutOfBoundsException: Range [23, 24) out of bounds for length 21

  }
  / Capture state (of-the-VM) information needed to evaluate the policy void() {/*donothing */ java.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 43
  virtual should_clear_referenceoop,jlongtimestamp_clockjava.lang.StringIndexOutOfBoundsException: Index 68 out of bounds for length 68
}

class LRUMaxHeapPolicy
private
   _max_interval

public   bool should_clear_reference(oopp jlong timestamp_clock{
  LRUMaxHeapPolicy();

  // Capture state (of-the-VM) information needed to evaluate the policy
  void setup();
  virtual bool should_clear_reference(oop p, jlong timestamp_clock)    return ;
java.lang.StringIndexOutOfBoundsException: Range [6, 7) out of bounds for length 2

endif// SHARE_GC_SHARED_REFERENCEPOLICY_HPP

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