1 /*

     2  * Copyright (c) 2017, Red Hat, Inc. and/or its affiliates.

     3  *

     4  * This code is free software; you can redistribute it and/or modify it

     5  * under the terms of the GNU General Public License version 2 only, as

     6  * published by the Free Software Foundation.

     7  *

     8  * This code is distributed in the hope that it will be useful, but WITHOUT

     9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    11  * version 2 for more details (a copy is included in the LICENSE file that

    12  * accompanied this code).

    13  *

    14  * You should have received a copy of the GNU General Public License version

    15  * 2 along with this work; if not, write to the Free Software Foundation,

    16  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    17  *

    18  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    19  * or visit www.oracle.com if you need additional information or have any

    20  * questions.

    21  *

    22  */

    23 

    24 #ifndef SHARE_VM_SERVICES_EPSILON_COLLECTORPOLICY_HPP

    25 #define SHARE_VM_SERVICES_EPSILON_COLLECTORPOLICY_HPP

    26 

    27 #include "utilities/macros.hpp"

    28 #if INCLUDE_ALL_GCS

    29 #include "gc/epsilon/epsilonCollectedHeap.hpp"

    30 #include "services/memoryPool.hpp"

    31 #include "services/memoryUsage.hpp"

    32 #endif // INCLUDE_ALL_GCS

    33 

    34 class EpsilonDummyMemoryPool : public CollectedMemoryPool {

    35 public:

    36   EpsilonDummyMemoryPool();

    37   MemoryUsage get_memory_usage()      { return MemoryUsage(0, 0, 0, 0); }

    38   size_t used_in_bytes()              { return 0; }

    39   size_t max_size() const             { return 0; }

    40 };

    41 

    42 class EpsilonMemoryPool : public CollectedMemoryPool {

    43 private:

    44   const static size_t _undefined_max = (size_t) -1;

    45   EpsilonCollectedHeap* _heap;

    46 

    47 public:

    48   EpsilonMemoryPool(EpsilonCollectedHeap* heap);

    49 

    50   size_t committed_in_bytes() {

    51     return _heap->capacity();

    52   }

    53   size_t used_in_bytes() {

    54     return _heap->used();

    55   }

    56   size_t max_size() const {

    57     return _heap->max_capacity();

    58   }

    59   MemoryUsage get_memory_usage();

    60 };

    61 

    62 #endif // SHARE_VM_SERVICES_EPSILON_COLLECTORPOLICY_HPP