1 /* 2 * Copyright (c) 2014, 2018, 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_SAMPLING_SAMPLEPRIORITYQUEUE_HPP 26 #define SHARE_VM_JFR_LEAKPROFILER_SAMPLING_SAMPLEPRIORITYQUEUE_HPP 27 28 #include "memory/allocation.hpp" 29 30 class ObjectSample; 31 32 // Priority queue that keeps object samples ordered 33 // by the amount of allocation they span. 34 class SamplePriorityQueue : public CHeapObj<mtTracing> { 35 private: 36 ObjectSample** _items; 37 size_t _allocated_size; 38 int _count; 39 size_t _total; 40 41 void swap(int i, int j); 42 void moveDown(int index); 43 void moveUp(int index); 44 45 public: 46 SamplePriorityQueue(size_t size); 47 ~SamplePriorityQueue(); 48 49 void push(ObjectSample* sample); 50 ObjectSample* pop(); 51 const ObjectSample* peek() const; 52 void remove(ObjectSample* sample); 53 ObjectSample* item_at(int index); 54 size_t total() const; 55 int count() const; 56 }; 57 58 #endif // SHARE_VM_JFR_LEAKPROFILER_SAMPLING_SAMPLEPRIORITYQUEUE_HPP