1 /* 2 * Copyright (c) 2016, 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_RECORDER_STORAGE_JFRSTORAGEUTILS_HPP 26 #define SHARE_VM_JFR_RECORDER_STORAGE_JFRSTORAGEUTILS_HPP 27 28 #include "jfr/recorder/storage/jfrBuffer.hpp" 29 #include "jfr/recorder/repository/jfrChunkWriter.hpp" 30 #include "jfr/utilities/jfrAllocation.hpp" 31 #include "jfr/utilities/jfrTypes.hpp" 32 #include "runtime/thread.hpp" 33 34 template <typename Operation, typename NextOperation> 35 class CompositeOperation { 36 private: 37 Operation* _op; 38 NextOperation* _next; 39 public: 40 CompositeOperation(Operation* op, NextOperation* next) : _op(op), _next(next) { 41 assert(_op != NULL, "invariant"); 42 } 43 typedef typename Operation::Type Type; 44 bool process(Type* t = NULL) { 45 return _next == NULL ? _op->process(t) : _op->process(t) && _next->process(t); 46 } 47 size_t processed() const { 48 return _next == NULL ? _op->processed() : _op->processed() + _next->processed(); 49 } 50 }; 51 52 template <typename T> 53 class UnBufferedWriteToChunk { 54 private: 55 JfrChunkWriter& _writer; 56 size_t _processed; 57 public: 58 typedef T Type; 59 UnBufferedWriteToChunk(JfrChunkWriter& writer) : _writer(writer), _processed(0) {} 60 bool write(Type* t, const u1* data, size_t size); 61 size_t processed() { return _processed; } 62 }; 63 64 template <typename T> 65 class DefaultDiscarder { 66 private: 67 size_t _processed; 68 public: 69 typedef T Type; 70 DefaultDiscarder() : _processed() {} 71 bool discard(Type* t, const u1* data, size_t size); 72 size_t processed() const { return _processed; } 73 }; 74 75 template <typename Operation> 76 class ConcurrentWriteOp { 77 private: 78 Operation& _operation; 79 public: 80 typedef typename Operation::Type Type; 81 ConcurrentWriteOp(Operation& operation) : _operation(operation) {} 82 bool process(Type* t); 83 size_t processed() const { return _operation.processed(); } 84 }; 85 86 template <typename Operation> 87 class MutexedWriteOp { 88 private: 89 Operation& _operation; 90 public: 91 typedef typename Operation::Type Type; 92 MutexedWriteOp(Operation& operation) : _operation(operation) {} 93 bool process(Type* t); 94 size_t processed() const { return _operation.processed(); } 95 }; 96 97 enum jfr_operation_mode { 98 mutexed = 1, 99 concurrent 100 }; 101 102 template <typename Operation> 103 class DiscardOp { 104 private: 105 Operation _operation; 106 jfr_operation_mode _mode; 107 public: 108 typedef typename Operation::Type Type; 109 DiscardOp(jfr_operation_mode mode = concurrent) : _operation(), _mode(mode) {} 110 bool process(Type* t); 111 size_t processed() const { return _operation.processed(); } 112 }; 113 114 #endif // SHARE_VM_JFR_RECORDER_STORAGE_JFRSTORAGEUTILS_HPP