1 /*
   2  * Copyright (c) 2002, 2014, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
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  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_CSPACECOUNTERS_HPP
  26 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_CSPACECOUNTERS_HPP
  27 
  28 #include "gc_implementation/shared/generationCounters.hpp"
  29 #include "memory/space.inline.hpp"
  30 #include "runtime/perfData.hpp"
  31 
  32 // A CSpaceCounters is a holder class for performance counters
  33 // that track a space;
  34 
  35 class CSpaceCounters: public CHeapObj<mtGC> {
  36   friend class VMStructs;
  37 
  38  private:
  39   PerfVariable*      _capacity;
  40   PerfVariable*      _used;
  41   PerfVariable*      _max_capacity;
  42 
  43   // Constant PerfData types don't need to retain a reference.
  44   // However, it's a good idea to document them here.
  45   // PerfConstant*     _size;
  46 
  47   ContiguousSpace*     _space;
  48   char*                _name_space;
  49 
  50  public:
  51 
  52   CSpaceCounters(const char* name, int ordinal, size_t max_size,
  53                  ContiguousSpace* s, GenerationCounters* gc);
  54 
  55   ~CSpaceCounters() {
  56       if (_name_space != NULL) FREE_C_HEAP_ARRAY(char, _name_space);
  57   }
  58 
  59   virtual inline void update_capacity() {
  60     _capacity->set_value(_space->capacity());
  61   }
  62 
  63   virtual inline void update_used() {
  64     _used->set_value(_space->used());
  65   }
  66 
  67   virtual inline void update_all() {
  68     update_used();
  69     update_capacity();
  70   }
  71 
  72   const char* name_space() const        { return _name_space; }
  73 };
  74 
  75 class ContiguousSpaceUsedHelper : public PerfLongSampleHelper {
  76   private:
  77     ContiguousSpace* _space;
  78 
  79   public:
  80     ContiguousSpaceUsedHelper(ContiguousSpace* space) : _space(space) { }
  81 
  82     inline jlong take_sample() {
  83       return _space->used();
  84     }
  85 };
  86 
  87 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_CSPACECOUNTERS_HPP