1 /* 2 * Copyright (c) 2017, 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_CHECKPOINT_TYPES_JFRTYPESETWRITER_HPP 26 #define SHARE_VM_JFR_CHECKPOINT_TYPES_JFRTYPESETWRITER_HPP 27 28 #include "jfr/recorder/checkpoint/jfrCheckpointWriter.hpp" 29 #include "jfr/utilities/jfrTypes.hpp" 30 #include "memory/allocation.hpp" 31 32 template <typename WriterImpl, u4 ID> 33 class JfrArtifactWriterHost : public StackObj { 34 private: 35 WriterImpl _impl; 36 JfrCheckpointWriter* _writer; 37 JfrCheckpointContext _ctx; 38 jlong _count_offset; 39 int _count; 40 bool _skip_header; 41 public: 42 JfrArtifactWriterHost(JfrCheckpointWriter* writer, 43 JfrArtifactSet* artifacts, 44 bool class_unload, 45 bool skip_header = false) : _impl(writer, artifacts, class_unload), 46 _writer(writer), 47 _ctx(writer->context()), 48 _count(0), 49 _skip_header(skip_header) { 50 assert(_writer != NULL, "invariant"); 51 if (!_skip_header) { 52 _writer->write_type((JfrTypeId)ID); 53 _count_offset = _writer->reserve(sizeof(u4)); // Don't know how many yet 54 } 55 } 56 57 ~JfrArtifactWriterHost() { 58 if (_count == 0) { 59 // nothing written, restore context for rewind 60 _writer->set_context(_ctx); 61 return; 62 } 63 assert(_count > 0, "invariant"); 64 if (!_skip_header) { 65 _writer->write_count(_count, _count_offset); 66 } 67 } 68 69 bool operator()(typename WriterImpl::Type const & value) { 70 this->_count += _impl(value); 71 return true; 72 } 73 74 int count() const { return _count; } 75 void add(int count) { _count += count; } 76 }; 77 78 typedef int(*artifact_write_operation)(JfrCheckpointWriter*, JfrArtifactSet*, const void*); 79 80 template <typename T, artifact_write_operation op> 81 class JfrArtifactWriterImplHost { 82 private: 83 JfrCheckpointWriter* _writer; 84 JfrArtifactSet* _artifacts; 85 bool _class_unload; 86 public: 87 typedef T Type; 88 JfrArtifactWriterImplHost(JfrCheckpointWriter* writer, JfrArtifactSet* artifacts, bool class_unload) : 89 _writer(writer), _artifacts(artifacts), _class_unload(class_unload) {} 90 int operator()(T const& value) { 91 return op(this->_writer, this->_artifacts, value); 92 } 93 }; 94 95 template <typename T, typename Predicate, artifact_write_operation op> 96 class JfrPredicatedArtifactWriterImplHost : public JfrArtifactWriterImplHost<T, op> { 97 private: 98 Predicate _predicate; 99 typedef JfrArtifactWriterImplHost<T, op> Parent; 100 public: 101 JfrPredicatedArtifactWriterImplHost(JfrCheckpointWriter* writer, JfrArtifactSet* artifacts, bool class_unload) : 102 Parent(writer, artifacts, class_unload), _predicate(class_unload) {} 103 int operator()(T const& value) { 104 return _predicate(value) ? Parent::operator()(value) : 0; 105 } 106 }; 107 108 #endif // SHARE_VM_JFR_CHECKPOINT_TYPES_JFRTYPESETWRITER_HPP