/*
 * Copyright (c) 2017, 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 "gc/serial/defNewGeneration.hpp"
#include "gc/serial/serialHeap.hpp"
#include "services/memoryManager.hpp"
#include "services/memoryPool.hpp"

SerialHeap::SerialHeap(GenCollectorPolicy* policy) : GenCollectedHeap(policy) {}

void SerialHeap::check_gen_kinds() {
  assert(young_gen()->kind() == Generation::DefNew,
         "Wrong youngest generation type");
  assert(old_gen()->kind() == Generation::MarkSweepCompact,
         "Wrong generation kind");
}

class CopyMemoryManager : public GCMemoryManager {
private:
public:
  CopyMemoryManager() : GCMemoryManager() {}

  const char* name() { return "Copy"; }
};

class MSCMemoryManager : public GCMemoryManager {
private:
public:
  MSCMemoryManager() : GCMemoryManager() {}

  const char* name() { return "MarkSweepCompact"; }
};

GrowableArray<GCMemoryManager*> SerialHeap::memory_managers() {
  _minor_mgr = new CopyMemoryManager();
  _major_mgr = new MSCMemoryManager();
  GrowableArray<GCMemoryManager*> mem_mgrs;
  mem_mgrs.append(_minor_mgr);
  mem_mgrs.append(_major_mgr);
  return mem_mgrs;
}

GrowableArray<MemoryPool*> SerialHeap::memory_pools() {
  DefNewGeneration* young = (DefNewGeneration*) young_gen();

  // Add a memory pool for each space and young gen doesn't
  // support low memory detection as it is expected to get filled up.
  MemoryPool* eden = new ContiguousSpacePool(young->eden(),
                                             "Eden Space",
                                             MemoryPool::Heap,
                                             young->max_eden_size(),
                                             false /* support_usage_threshold */);
  MemoryPool* survivor = new SurvivorContiguousSpacePool(young,
                                                         "Survivor Space",
                                                         MemoryPool::Heap,
                                                         young->max_survivor_size(),
                                                         false /* support_usage_threshold */);
  GenerationPool* old = new GenerationPool(old_gen(), "Tenured Gen", MemoryPool::Heap, true);

  GrowableArray<MemoryPool*> mem_pools;
  mem_pools.append(eden);
  mem_pools.append(survivor);
  mem_pools.append(old);

  _minor_mgr->add_pool(eden);
  _minor_mgr->add_pool(survivor);

  _major_mgr->add_pool(eden);
  _major_mgr->add_pool(survivor);
  _major_mgr->add_pool(old);

  return mem_pools;
}