/*

 * Copyright (c) 2003, 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.

 *

 */

#ifndef SHARE_VM_SERVICES_MEMORYSERVICE_HPP

#define SHARE_VM_SERVICES_MEMORYSERVICE_HPP

#include "gc/shared/gcCause.hpp"

#include "gc/shared/generation.hpp"

#include "logging/log.hpp"

#include "memory/allocation.hpp"

#include "runtime/handles.hpp"

#include "services/memoryUsage.hpp"

// Forward declaration

class MemoryPool;

class MemoryManager;

class GCMemoryManager;

class CollectedHeap;

class Generation;

class DefNewGeneration;

class PSYoungGen;

class PSOldGen;

class CodeHeap;

class ContiguousSpace;

class CompactibleFreeListSpace;

class GenCollectedHeap;

class ParallelScavengeHeap;

class G1CollectedHeap;

// VM Monitoring and Management Support

class MemoryService : public AllStatic {

private:

  enum {

    init_pools_list_size = 10,

    init_managers_list_size = 5,

    init_code_heap_pools_size = 9

  };

  static GrowableArray<MemoryPool*>*    _pools_list;

  static GrowableArray<MemoryManager*>* _managers_list;

  // memory managers for minor and major GC statistics

  static GCMemoryManager*               _major_gc_manager;

  static GCMemoryManager*               _minor_gc_manager;

  // memory manager and code heap pools for the CodeCache

  static MemoryManager*                 _code_cache_manager;

  static GrowableArray<MemoryPool*>*    _code_heap_pools;

  static MemoryPool*                    _metaspace_pool;

  static MemoryPool*                    _compressed_class_pool;

  static void add_generation_memory_pool(Generation* gen,

                                         MemoryManager* major_mgr,

                                         MemoryManager* minor_mgr);

  static void add_generation_memory_pool(Generation* gen,

                                         MemoryManager* major_mgr) {

    add_generation_memory_pool(gen, major_mgr, NULL);

  }

  static void add_psYoung_memory_pool(PSYoungGen* young_gen,

                                      MemoryManager* major_mgr,

                                      MemoryManager* minor_mgr);

  static void add_psOld_memory_pool(PSOldGen* old_gen,

                                    MemoryManager* mgr);

  static void add_g1YoungGen_memory_pool(G1CollectedHeap* g1h,

                                         MemoryManager* major_mgr,

                                         MemoryManager* minor_mgr);

  static void add_g1OldGen_memory_pool(G1CollectedHeap* g1h,

                                       MemoryManager* mgr);

  static MemoryPool* add_space(ContiguousSpace* space,

                               const char* name,

                               bool is_heap,

                               size_t max_size,

                               bool support_usage_threshold);

  static MemoryPool* add_survivor_spaces(DefNewGeneration* young_gen,

                                         const char* name,

                                         bool is_heap,

                                         size_t max_size,

                                         bool support_usage_threshold);

  static MemoryPool* add_gen(Generation* gen,

                             const char* name,

                             bool is_heap,

                             bool support_usage_threshold);

  static MemoryPool* add_cms_space(CompactibleFreeListSpace* space,

                                   const char* name,

                                   bool is_heap,

                                   size_t max_size,

                                   bool support_usage_threshold);

  static void add_gen_collected_heap_info(GenCollectedHeap* heap);

  static void add_parallel_scavenge_heap_info(ParallelScavengeHeap* heap);

  static void add_g1_heap_info(G1CollectedHeap* g1h);

public:

  static void set_universe_heap(CollectedHeap* heap);

  static void add_code_heap_memory_pool(CodeHeap* heap, const char* name);

  static void add_metaspace_memory_pools();

  static MemoryPool*    get_memory_pool(instanceHandle pool);

  static MemoryManager* get_memory_manager(instanceHandle mgr);

  static const int num_memory_pools() {

    return _pools_list->length();

  }

  static const int num_memory_managers() {

    return _managers_list->length();

  }

  static MemoryPool* get_memory_pool(int index) {

    return _pools_list->at(index);

  }

  static MemoryManager* get_memory_manager(int index) {

    return _managers_list->at(index);

  }

  static void track_memory_usage();

  static void track_code_cache_memory_usage() {

    // Track memory pool usage of all CodeCache memory pools

    for (int i = 0; i < _code_heap_pools->length(); ++i) {

      track_memory_pool_usage(_code_heap_pools->at(i));

    }

  }

  static void track_metaspace_memory_usage() {

    track_memory_pool_usage(_metaspace_pool);

  }

  static void track_compressed_class_memory_usage() {

    track_memory_pool_usage(_compressed_class_pool);

  }

  static void track_memory_pool_usage(MemoryPool* pool);

  static void gc_begin(bool fullGC, bool recordGCBeginTime,

                       bool recordAccumulatedGCTime,

                       bool recordPreGCUsage, bool recordPeakUsage);

  static void gc_end(bool fullGC, bool recordPostGCUsage,

                     bool recordAccumulatedGCTime,

                     bool recordGCEndTime, bool countCollection,

                     GCCause::Cause cause);

  static void oops_do(OopClosure* f);

  static bool get_verbose() { return log_is_enabled(Info, gc); }

  static bool set_verbose(bool verbose);

  // Create an instance of java/lang/management/MemoryUsage

  static Handle create_MemoryUsage_obj(MemoryUsage usage, TRAPS);

  static const GCMemoryManager* get_minor_gc_manager() {

      return _minor_gc_manager;

  }

  static const GCMemoryManager* get_major_gc_manager() {

      return _major_gc_manager;

  }

};

class TraceMemoryManagerStats : public StackObj {

private:

  bool         _fullGC;

  bool         _recordGCBeginTime;

  bool         _recordPreGCUsage;

  bool         _recordPeakUsage;

  bool         _recordPostGCUsage;

  bool         _recordAccumulatedGCTime;

  bool         _recordGCEndTime;

  bool         _countCollection;

  GCCause::Cause _cause;

public:

  TraceMemoryManagerStats() {}

  TraceMemoryManagerStats(bool fullGC,

                          GCCause::Cause cause,

                          bool recordGCBeginTime = true,

                          bool recordPreGCUsage = true,

                          bool recordPeakUsage = true,

                          bool recordPostGCUsage = true,

                          bool recordAccumulatedGCTime = true,

                          bool recordGCEndTime = true,

                          bool countCollection = true);

  void initialize(bool fullGC,

                  GCCause::Cause cause,

                  bool recordGCBeginTime,

                  bool recordPreGCUsage,

                  bool recordPeakUsage,

                  bool recordPostGCUsage,

                  bool recordAccumulatedGCTime,

                  bool recordGCEndTime,

                  bool countCollection);

  TraceMemoryManagerStats(Generation::Name kind, GCCause::Cause cause);

  ~TraceMemoryManagerStats();

};

#endif // SHARE_VM_SERVICES_MEMORYSERVICE_HPP