1 /*

     2  * Copyright (c) 2002, 2015, 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

    21  * questions.

    22  *

    23  */

    24 

    25 #ifndef SHARE_VM_GC_SHARED_GENERATIONCOUNTERS_HPP

    26 #define SHARE_VM_GC_SHARED_GENERATIONCOUNTERS_HPP

    27 

    28 #include "memory/virtualspace.hpp"

    29 #include "runtime/perfData.hpp"

    30 

    31 // A GenerationCounter is a holder class for performance counters

    32 // that track a generation

    33 

    34 class GenerationCounters: public CHeapObj<mtGC> {

    35   friend class VMStructs;

    36 

    37 private:

    38   void initialize(const char* name, int ordinal, int spaces,

    39                   size_t min_capacity, size_t max_capacity,

    40                   size_t curr_capacity);

    41 

    42  protected:

    43   PerfVariable*      _current_size;

    44   VirtualSpace*      _virtual_space;

    45 

    46   // Constant PerfData types don't need to retain a reference.

    47   // However, it's a good idea to document them here.

    48   // PerfStringConstant*     _name;

    49   // PerfConstant*           _min_size;

    50   // PerfConstant*           _max_size;

    51   // PerfConstant*           _spaces;

    52 

    53   char*              _name_space;

    54 

    55   // This constructor is only meant for use with the PSGenerationCounters

    56   // constructor. The need for such an constructor should be eliminated

    57   // when VirtualSpace and PSVirtualSpace are unified.

    58   GenerationCounters()

    59              : _name_space(NULL), _current_size(NULL), _virtual_space(NULL) {}

    60 

    61   // This constructor is used for subclasses that do not have a space

    62   // associated with them (e.g, in G1).

    63   GenerationCounters(const char* name, int ordinal, int spaces,

    64                      size_t min_capacity, size_t max_capacity,

    65                      size_t curr_capacity);

    66 

    67  public:

    68   GenerationCounters(const char* name, int ordinal, int spaces,

    69                      size_t min_capacity, size_t max_capacity, VirtualSpace* v);

    70 

    71   ~GenerationCounters() {

    72     if (_name_space != NULL) FREE_C_HEAP_ARRAY(char, _name_space);

    73   }

    74 

    75   virtual void update_all();

    76 

    77   const char* name_space() const        { return _name_space; }

    78 

    79 };

    80 #endif // SHARE_VM_GC_SHARED_GENERATIONCOUNTERS_HPP