/*

 * Copyright (c) 2001, 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.

 *

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

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

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

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

 * accompanied this code).

 *

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

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

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

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#ifndef SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_GENERATIONSIZER_HPP

#define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_GENERATIONSIZER_HPP

#include "memory/collectorPolicy.hpp"

// There is a nice batch of tested generation sizing code in

// TwoGenerationCollectorPolicy. Lets reuse it!

class GenerationSizer : public TwoGenerationCollectorPolicy {

 public:

  GenerationSizer() {

    // Partial init only!

    initialize_flags();

    initialize_size_info();

  }

  void initialize_flags() {

    // Do basic sizing work

    TwoGenerationCollectorPolicy::initialize_flags();

    assert(UseSerialGC ||

           !FLAG_IS_DEFAULT(ParallelGCThreads) ||

           (ParallelGCThreads > 0),

           "ParallelGCThreads should be set before flag initialization");

    // The survivor ratio's are calculated "raw", unlike the

    // default gc, which adds 2 to the ratio value. We need to

    // make sure the values are valid before using them.

    if (MinSurvivorRatio < 3) {

      MinSurvivorRatio = 3;

    }

    if (InitialSurvivorRatio < 3) {

      InitialSurvivorRatio = 3;

    }

  }

  size_t min_young_gen_size() { return _min_gen0_size; }

  size_t young_gen_size()     { return _initial_gen0_size; }

  size_t max_young_gen_size() { return _max_gen0_size; }

  size_t min_old_gen_size()   { return _min_gen1_size; }

  size_t old_gen_size()       { return _initial_gen1_size; }

  size_t max_old_gen_size()   { return _max_gen1_size; }

};

#endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_GENERATIONSIZER_HPP