jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/shared/spaceCounters.hpp@097d78aaf2b5

7198873: NPG: VM Does not unload classes with UseConcMarkSweepGC
Reviewed-by: johnc, mgerdin, jwilhelm

     1 /*

     2  * Copyright (c) 2002, 2010, 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  */

    25 #ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_SPACECOUNTERS_HPP

    26 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_SPACECOUNTERS_HPP

    28 #ifndef SERIALGC

    29 #include "gc_implementation/shared/generationCounters.hpp"

    30 #include "gc_implementation/shared/immutableSpace.hpp"

    31 #include "gc_implementation/shared/mutableSpace.hpp"

    32 #include "runtime/perfData.hpp"

    33 #endif

    35 // A SpaceCounter is a holder class for performance counters

    36 // that track a space;

    38 class SpaceCounters: public CHeapObj<mtGC> {

    39   friend class VMStructs;

    41  private:

    42   PerfVariable*      _capacity;

    43   PerfVariable*      _used;

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

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

    47   // PerfConstant*     _size;

    49   MutableSpace*     _object_space;

    50   char*             _name_space;

    52  public:

    54   SpaceCounters(const char* name, int ordinal, size_t max_size,

    55                 MutableSpace* m, GenerationCounters* gc);

    57   ~SpaceCounters() {

    58     if (_name_space != NULL) FREE_C_HEAP_ARRAY(char, _name_space, mtGC);

    59   }

    61   inline void update_capacity() {

    62     _capacity->set_value(_object_space->capacity_in_bytes());

    63   }

    65   inline void update_used() {

    66     _used->set_value(_object_space->used_in_bytes());

    67   }

    69   inline void update_all() {

    70     update_used();

    71     update_capacity();

    72   }

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

    75 };

    77 class MutableSpaceUsedHelper: public PerfLongSampleHelper {

    78   private:

    79     MutableSpace* _m;

    81   public:

    82     MutableSpaceUsedHelper(MutableSpace* m) : _m(m) { }

    84     inline jlong take_sample() {

    85       return _m->used_in_bytes();

    86     }

    87 };

    89 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_SPACECOUNTERS_HPP

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