1 /* 2 * Copyright (c) 2016, 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_RECORDER_CHECKPOINT_JFRCHECKPOINTBLOB_HPP 26 #define SHARE_VM_JFR_RECORDER_CHECKPOINT_JFRCHECKPOINTBLOB_HPP 27 28 #include "jfr/utilities/jfrAllocation.hpp" 29 #include "jfr/utilities/jfrRefCountPointer.hpp" 30 31 class JfrCheckpointBlob; 32 class JfrCheckpointWriter; 33 34 typedef RefCountPointer<JfrCheckpointBlob, MultiThreadedRefCounter> JfrCheckpointBlobReference; 35 typedef RefCountHandle<JfrCheckpointBlobReference> JfrCheckpointBlobHandle; 36 37 class JfrCheckpointBlob : public JfrCHeapObj { 38 template <typename, typename> 39 friend class RefCountPointer; 40 private: 41 const u1* _checkpoint; 42 const size_t _size; 43 JfrCheckpointBlobHandle _next; 44 mutable bool _written; 45 46 JfrCheckpointBlob(const u1* checkpoint, size_t size); 47 ~JfrCheckpointBlob(); 48 const JfrCheckpointBlobHandle& next() const; 49 void write_this(JfrCheckpointWriter& writer) const; 50 51 public: 52 void write(JfrCheckpointWriter& writer) const; 53 void exclusive_write(JfrCheckpointWriter& writer) const; 54 void reset_write_state() const; 55 void set_next(const JfrCheckpointBlobHandle& ref); 56 static JfrCheckpointBlobHandle make(const u1* checkpoint, size_t size); 57 }; 58 59 #endif // SHARE_VM_JFR_RECORDER_CHECKPOINT_JFRCHECKPOINTBLOB_HPP