1 /* 2 * Copyright (c) 2016, 2020, 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_JFR_RECORDER_CHECKPOINT_JFRCHECKPOINTWRITER_HPP 26 #define SHARE_JFR_RECORDER_CHECKPOINT_JFRCHECKPOINTWRITER_HPP 27 28 #include "jfr/recorder/storage/jfrBuffer.hpp" 29 #include "jfr/utilities/jfrBlob.hpp" 30 #include "jfr/utilities/jfrTime.hpp" 31 #include "jfr/utilities/jfrTypes.hpp" 32 #include "jfr/writers/jfrEventWriterHost.inline.hpp" 33 #include "jfr/writers/jfrMemoryWriterHost.inline.hpp" 34 #include "jfr/writers/jfrStorageAdapter.hpp" 35 36 class Thread; 37 38 class JfrCheckpointFlush : public StackObj { 39 public: 40 typedef JfrBuffer Type; 41 JfrCheckpointFlush(Type* old, size_t used, size_t requested, Thread* t); result()42 Type* result() { return _result; } 43 private: 44 Type* _result; 45 }; 46 47 typedef Adapter<JfrCheckpointFlush> JfrCheckpointAdapter; 48 typedef AcquireReleaseMemoryWriterHost<JfrCheckpointAdapter, StackObj > JfrTransactionalCheckpointWriter; 49 typedef EventWriterHost<BigEndianEncoder, CompressedIntegerEncoder, JfrTransactionalCheckpointWriter> JfrCheckpointWriterBase; 50 51 struct JfrCheckpointContext { 52 int64_t offset; 53 u4 count; 54 }; 55 56 class JfrCheckpointWriter : public JfrCheckpointWriterBase { 57 friend class JfrCheckpointManager; 58 friend class JfrSerializerRegistration; 59 friend class JfrTypeManager; 60 private: 61 JfrTicks _time; 62 int64_t _offset; 63 u4 _count; 64 JfrCheckpointType _type; 65 bool _header; 66 67 u4 count() const; 68 void set_count(u4 count); 69 void increment(); 70 const u1* session_data(size_t* size, bool move = false, const JfrCheckpointContext* ctx = NULL); 71 void release(); 72 JfrCheckpointWriter(bool previous_epoch, Thread* thread, JfrCheckpointType type = GENERIC); 73 public: 74 JfrCheckpointWriter(JfrCheckpointType type = GENERIC); 75 JfrCheckpointWriter(Thread* thread, bool header = true, JfrCheckpointType mode = GENERIC, bool global_lease = true); 76 ~JfrCheckpointWriter(); 77 void write_type(JfrTypeId type_id); 78 void write_count(u4 nof_entries); 79 void write_count(u4 nof_entries, int64_t offset); 80 void write_key(u8 key); 81 const JfrCheckpointContext context() const; 82 void set_context(const JfrCheckpointContext ctx); 83 bool has_data() const; 84 JfrBlobHandle copy(const JfrCheckpointContext* ctx = NULL); 85 JfrBlobHandle move(const JfrCheckpointContext* ctx = NULL); 86 }; 87 88 #endif // SHARE_JFR_RECORDER_CHECKPOINT_JFRCHECKPOINTWRITER_HPP 89