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. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_VM_JFR_LEAKPROFILER_CHAINS_EDGEQUEUE_HPP 26 #define SHARE_VM_JFR_LEAKPROFILER_CHAINS_EDGEQUEUE_HPP 27 28 #include "memory/allocation.hpp" 29 #include "jfr/leakprofiler/chains/edge.hpp" 30 31 class JfrVirtualMemory; 32 33 class 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_VM_JFR_LEAKPROFILER_CHAINS_EDGEQUEUE_HPP