/*

 * Copyright (c) 2016, 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

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 */

#ifndef SHARE_GC_SHARED_PRESERVEDMARKS_INLINE_HPP

#define SHARE_GC_SHARED_PRESERVEDMARKS_INLINE_HPP

#include "gc/shared/preservedMarks.hpp"

#include "logging/log.hpp"

#include "oops/oop.inline.hpp"

#include "utilities/stack.inline.hpp"

inline bool PreservedMarks::should_preserve_mark(oop obj, markWord m) const {

  return obj->mark_must_be_preserved_for_promotion_failure(m);

}

inline void PreservedMarks::push(oop obj, markWord m) {

  assert(should_preserve_mark(obj, m), "pre-condition");

  OopAndMarkWord elem(obj, m);

  _stack.push(elem);

}

inline void PreservedMarks::push_if_necessary(oop obj, markWord m) {

  if (should_preserve_mark(obj, m)) {

    push(obj, m);

  }

}

inline void PreservedMarks::init_forwarded_mark(oop obj) {

  obj->init_mark_raw();

}

inline void PreservedMarksSet::restore(RestorePreservedMarksTaskExecutor* executor) {

  volatile size_t total_size = 0;

#ifdef ASSERT

  // This is to make sure the total_size we'll calculate below is correct.

  size_t total_size_before = 0;

  for (uint i = 0; i < _num; i += 1) {

    total_size_before += get(i)->size();

  }

#endif // def ASSERT

  executor->restore(this, &total_size);

  assert_empty();

  assert(total_size == total_size_before,

         "total_size = " SIZE_FORMAT " before = " SIZE_FORMAT,

         total_size, total_size_before);

  log_trace(gc)("Restored " SIZE_FORMAT " marks", total_size);

}

inline PreservedMarks::PreservedMarks()

    : _stack(OopAndMarkWordStack::default_segment_size(),

             // This stack should be used very infrequently so there's

             // no point in caching stack segments (there will be a

             // waste of space most of the time). So we set the max

             // cache size to 0.

             0 /* max_cache_size */) { }

void PreservedMarks::OopAndMarkWord::set_mark() const {

  _o->set_mark_raw(_m);

}

#endif // SHARE_GC_SHARED_PRESERVEDMARKS_INLINE_HPP