hotspot/src/share/vm/memory/referencePolicy.hpp

rev 611 : Merge

*** 1,10 ****
  #ifdef USE_PRAGMA_IDENT_HDR
  #pragma ident "@(#)referencePolicy.hpp  1.11 07/05/05 17:05:54 JVM"
  #endif
  /*
!  * Copyright 2000 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.
--- 1,10 ----
  #ifdef USE_PRAGMA_IDENT_HDR
  #pragma ident "@(#)referencePolicy.hpp  1.11 07/05/05 17:05:54 JVM"
  #endif
  /*
!  * Copyright 2000-2008 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.
*** 27,39 ****
  
  // referencePolicy is used to determine when soft reference objects
  // should be cleared.
  
  
! class ReferencePolicy : public ResourceObj {
   public:
    virtual bool should_clear_reference(oop p)       { ShouldNotReachHere(); return true; }
  };
  
  class NeverClearPolicy : public ReferencePolicy {
   public:
    bool should_clear_reference(oop p) { return false; }
--- 27,41 ----
  
  // referencePolicy is used to determine when soft reference objects
  // should be cleared.
  
  
! class ReferencePolicy : public CHeapObj {
   public:
    virtual bool should_clear_reference(oop p)       { ShouldNotReachHere(); return true; }
+   // Capture state (of-the-VM) information needed to evaluate the policy
+   virtual void setup() { /* do nothing */ }
  };
  
  class NeverClearPolicy : public ReferencePolicy {
   public:
    bool should_clear_reference(oop p) { return false; }
*** 49,65 ****
--- 51,71 ----
    jlong _max_interval;
  
   public:
    LRUCurrentHeapPolicy();
  
+   // Capture state (of-the-VM) information needed to evaluate the policy
+   void setup();
    bool should_clear_reference(oop p);
  };
  
  class LRUMaxHeapPolicy : public ReferencePolicy {
   private:
    jlong _max_interval;
  
   public:
    LRUMaxHeapPolicy();
  
+   // Capture state (of-the-VM) information needed to evaluate the policy
+   void setup();
    bool should_clear_reference(oop p);
  };