src/share/vm/utilities/bitMap.hpp

rev 8910 : full patch for jfr

*** 1,7 ****
  /*
!  * Copyright (c) 1997, 2013, 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.
--- 1,7 ----
  /*
!  * Copyright (c) 1997, 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.
*** 270,279 ****
--- 270,288 ----
    // Printing
    void print_on(outputStream* st) const;
  #endif
  };
  
+ // A concrete implementation of the the "abstract" BitMap class.
+ //
+ // The BitMapView is used when the backing storage is managed externally.
+ class BitMapView : public BitMap {
+  public:
+   BitMapView() : BitMap((bm_word_t*)NULL, (idx_t)0) {}
+   BitMapView(bm_word_t* map, idx_t size_in_bits) : BitMap(map, size_in_bits) {}
+ };
+ 
  // Convenience class wrapping BitMap which provides multiple bits per slot.
  class BitMap2D VALUE_OBJ_CLASS_SPEC {
   public:
    typedef BitMap::idx_t idx_t;          // Type used for bit and word indices.
    typedef BitMap::bm_word_t bm_word_t;  // Element type of array that