/*

 * Copyright (c) 2015, 2018, 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_GC_Z_ZHEAP_HPP

#define SHARE_GC_Z_ZHEAP_HPP

#include "gc/shared/gcTimer.hpp"

#include "gc/z/zAllocationFlags.hpp"

#include "gc/z/zArray.hpp"

#include "gc/z/zList.hpp"

#include "gc/z/zLock.hpp"

#include "gc/z/zMark.hpp"

#include "gc/z/zObjectAllocator.hpp"

#include "gc/z/zPage.hpp"

#include "gc/z/zPageAllocator.hpp"

#include "gc/z/zPageTable.hpp"

#include "gc/z/zReferenceProcessor.hpp"

#include "gc/z/zRelocate.hpp"

#include "gc/z/zRelocationSet.hpp"

#include "gc/z/zRelocationSetSelector.hpp"

#include "gc/z/zRootsIterator.hpp"

#include "gc/z/zWeakRootsProcessor.hpp"

#include "gc/z/zServiceability.hpp"

#include "gc/z/zWorkers.hpp"

#include "memory/allocation.hpp"

class ZHeap {

  friend class VMStructs;

private:

  static ZHeap*       _heap;

  ZWorkers            _workers;

  ZObjectAllocator    _object_allocator;

  ZPageAllocator      _page_allocator;

  ZPageTable          _pagetable;

  ZMark               _mark;

  ZReferenceProcessor _reference_processor;

  ZWeakRootsProcessor _weak_roots_processor;

  ZRelocate           _relocate;

  ZRelocationSet      _relocation_set;

  ZServiceability     _serviceability;

  size_t heap_min_size() const;

  size_t heap_max_size() const;

  size_t heap_max_reserve_size() const;

  void out_of_memory();

  void flip_views();

  void fixup_partial_loads();

public:

  static ZHeap* heap();

  ZHeap();

  bool is_initialized() const;

  // Heap metrics

  size_t min_capacity() const;

  size_t max_capacity() const;

  size_t capacity() const;

  size_t max_reserve() const;

  size_t used_high() const;

  size_t used_low() const;

  size_t used() const;

  size_t allocated() const;

  size_t reclaimed() const;

  size_t tlab_capacity() const;

  size_t tlab_used() const;

  size_t max_tlab_size() const;

  size_t unsafe_max_tlab_alloc() const;

  bool is_in(uintptr_t addr) const;

  // Block

  uintptr_t block_start(uintptr_t addr) const;

  size_t block_size(uintptr_t addr) const;

  bool block_is_obj(uintptr_t addr) const;

  // Workers

  uint nconcurrent_worker_threads() const;

  uint nconcurrent_no_boost_worker_threads() const;

  void set_boost_worker_threads(bool boost);

  void worker_threads_do(ThreadClosure* tc) const;

  void print_worker_threads_on(outputStream* st) const;

  // Reference processing

  ReferenceDiscoverer* reference_discoverer();

  void set_soft_reference_policy(bool clear);

  // Non-strong reference processing

  void process_non_strong_references();

  // Page allocation

  ZPage* alloc_page(uint8_t type, size_t size, ZAllocationFlags flags);

  void undo_alloc_page(ZPage* page);

  bool retain_page(ZPage* page);

  void release_page(ZPage* page, bool reclaimed);

  // Object allocation

  uintptr_t alloc_tlab(size_t size);

  uintptr_t alloc_object(size_t size);

  uintptr_t alloc_object_for_relocation(size_t size);

  void undo_alloc_object_for_relocation(uintptr_t addr, size_t size);

  bool is_alloc_stalled() const;

  void check_out_of_memory();

  // Marking

  bool is_object_live(uintptr_t addr) const;

  bool is_object_strongly_live(uintptr_t addr) const;

  template <bool finalizable, bool publish> void mark_object(uintptr_t addr);

  void mark_start();

  void mark();

  void mark_flush_and_free(Thread* thread);

  bool mark_end();

  // Post-marking & Pre-relocation

  void destroy_detached_pages();

  // Relocation set

  void select_relocation_set();

  void prepare_relocation_set();

  void reset_relocation_set();

  // Relocation

  bool is_relocating(uintptr_t addr) const;

  void relocate_start();

  uintptr_t relocate_object(uintptr_t addr);

  uintptr_t forward_object(uintptr_t addr);

  void relocate();

  // Iteration

  void object_iterate(ObjectClosure* cl, bool visit_referents);

  // Serviceability

  void serviceability_initialize();

  GCMemoryManager* serviceability_memory_manager();

  MemoryPool* serviceability_memory_pool();

  ZServiceabilityCounters* serviceability_counters();

  // Printing

  void print_on(outputStream* st) const;

  void print_extended_on(outputStream* st) const;

  // Verification

  bool is_oop(oop object) const;

  void verify();

};

#endif // SHARE_GC_Z_ZHEAP_HPP