/*

 * 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.

 *

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

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

 * questions.

 *

 */

class PSGenerationPool : public CollectedMemoryPool {

private:

  PSOldGen* _gen;

public:

  PSGenerationPool(PSOldGen* pool, const char* name, PoolType type, bool support_usage_threshold);

  PSGenerationPool(PSPermGen* pool, const char* name, PoolType type, bool support_usage_threshold);

  MemoryUsage get_memory_usage();

  size_t used_in_bytes()              { return _gen->used_in_bytes(); }

  size_t max_size() const             { return _gen->reserved().byte_size(); }

};

class EdenMutableSpacePool : public CollectedMemoryPool {

private:

  PSYoungGen*   _gen;

  MutableSpace* _space;

public:

  EdenMutableSpacePool(PSYoungGen* gen,

                       MutableSpace* space,

                       const char* name,

                       PoolType type,

                       bool support_usage_threshold);

  MutableSpace* space()                     { return _space; }

  MemoryUsage get_memory_usage();

  size_t used_in_bytes()                    { return space()->used_in_bytes(); }

  size_t max_size() const {

    // Eden's max_size = max_size of Young Gen - the current committed size of survivor spaces

    return _gen->max_size() - _gen->from_space()->capacity_in_bytes() - _gen->to_space()->capacity_in_bytes();

  }

};

class SurvivorMutableSpacePool : public CollectedMemoryPool {

private:

  PSYoungGen*   _gen;

public:

  SurvivorMutableSpacePool(PSYoungGen* gen,

                           const char* name,

                           PoolType type,

                           bool support_usage_threshold);

  MemoryUsage get_memory_usage();

  size_t used_in_bytes() {

    return _gen->from_space()->used_in_bytes();

  }

  size_t committed_in_bytes() {

    return _gen->from_space()->capacity_in_bytes();

  }

  size_t max_size() const {

    // Return current committed size of the from-space

    return _gen->from_space()->capacity_in_bytes();

  }

};