1/*
2 * Copyright (c) 2014, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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23 */
24
25#ifndef SHARE_JFR_LEAKPROFILER_CHAINS_EDGEQUEUE_HPP
26#define SHARE_JFR_LEAKPROFILER_CHAINS_EDGEQUEUE_HPP
27
28#include "memory/allocation.hpp"
29#include "jfr/leakprofiler/chains/edge.hpp"
30
31class JfrVirtualMemory;
32
33class EdgeQueue : public CHeapObj<mtTracing> {
34 private:
35 JfrVirtualMemory* _vmm;
36 const size_t _reservation_size_bytes;
37 const size_t _commit_block_size_bytes;
38 mutable size_t _top_index;
39 mutable size_t _bottom_index;
40 public:
41 EdgeQueue(size_t reservation_size_bytes, size_t commit_block_size_bytes);
42 ~EdgeQueue();
43
44 bool initialize();
45
46 void add(const Edge* parent, const oop* ref);
47 const Edge* remove() const;
48 const Edge* element_at(size_t index) const;
49
50 size_t top() const;
51 size_t bottom() const;
52 bool is_empty() const;
53 bool is_full() const;
54
55 size_t reserved_size() const;
56 size_t live_set() const;
57 size_t sizeof_edge() const; // with alignments
58};
59
60#endif // SHARE_JFR_LEAKPROFILER_CHAINS_EDGEQUEUE_HPP
61