/*

 * Copyright (c) 2007, 2015, 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.

 *

 * 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.

 *

 */

#include "precompiled.hpp"

#include "classfile/systemDictionary.hpp"

#include "classfile/vmSymbols.hpp"

#include "oops/oop.inline.hpp"

#include "runtime/handles.inline.hpp"

#include "runtime/javaCalls.hpp"

#include "services/lowMemoryDetector.hpp"

#include "services/management.hpp"

#include "services/memoryManager.hpp"

#include "services/psMemoryPool.hpp"

PSGenerationPool::PSGenerationPool(PSOldGen* old_gen,

                                   const char* name,

                                   PoolType type,

                                   bool support_usage_threshold) :

  CollectedMemoryPool(name, type, old_gen->capacity_in_bytes(),

                      old_gen->reserved().byte_size(), support_usage_threshold), _old_gen(old_gen) {

}

MemoryUsage PSGenerationPool::get_memory_usage() {

  size_t maxSize   = (available_for_allocation() ? max_size() : 0);

  size_t used      = used_in_bytes();

  size_t committed = _old_gen->capacity_in_bytes();

  return MemoryUsage(initial_size(), used, committed, maxSize);

}

// The max size of EdenMutableSpacePool =

//     max size of the PSYoungGen - capacity of two survivor spaces

//

// Max size of PS eden space is changing due to ergonomic.

// PSYoungGen, PSOldGen, Eden, Survivor spaces are all resizable.

//

EdenMutableSpacePool::EdenMutableSpacePool(PSYoungGen* young_gen,

                                           MutableSpace* space,

                                           const char* name,

                                           PoolType type,

                                           bool support_usage_threshold) :

  CollectedMemoryPool(name, type, space->capacity_in_bytes(),

                      (young_gen->max_size() - young_gen->from_space()->capacity_in_bytes() - young_gen->to_space()->capacity_in_bytes()),

                       support_usage_threshold),

  _young_gen(young_gen),

  _space(space) {

}

MemoryUsage EdenMutableSpacePool::get_memory_usage() {

  size_t maxSize   = (available_for_allocation() ? max_size() : 0);

  size_t used = used_in_bytes();

  size_t committed = _space->capacity_in_bytes();

  return MemoryUsage(initial_size(), used, committed, maxSize);

}

// The max size of SurvivorMutableSpacePool =

//     current capacity of the from-space

//

// PS from and to survivor spaces could have different sizes.

//

SurvivorMutableSpacePool::SurvivorMutableSpacePool(PSYoungGen* young_gen,

                                                   const char* name,

                                                   PoolType type,

                                                   bool support_usage_threshold) :

  CollectedMemoryPool(name, type, young_gen->from_space()->capacity_in_bytes(),

                      young_gen->from_space()->capacity_in_bytes(),

                      support_usage_threshold), _young_gen(young_gen) {

}

MemoryUsage SurvivorMutableSpacePool::get_memory_usage() {

  size_t maxSize = (available_for_allocation() ? max_size() : 0);

  size_t used    = used_in_bytes();

  size_t committed = committed_in_bytes();

  return MemoryUsage(initial_size(), used, committed, maxSize);

}