1 /*
   2  * Copyright (c) 2012, 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_JFR_RECORDER_REPOSITORY_JFRCHUNKWRITER_HPP
  26 #define SHARE_JFR_RECORDER_REPOSITORY_JFRCHUNKWRITER_HPP
  27 
  28 #include "jfr/writers/jfrStorageAdapter.hpp"
  29 #include "jfr/writers/jfrStreamWriterHost.inline.hpp"
  30 #include "jfr/writers/jfrWriterHost.inline.hpp"
  31 
  32 typedef MallocAdapter<M> JfrStreamBuffer; // 1 mb buffered writes
  33 typedef StreamWriterHost<JfrStreamBuffer, JfrCHeapObj> JfrBufferedStreamWriter;
  34 typedef WriterHost<BigEndianEncoder, CompressedIntegerEncoder, JfrBufferedStreamWriter> JfrChunkWriterBase;
  35 
  36 class JfrChunkState;
  37 
  38 class JfrChunkWriter : public JfrChunkWriterBase {
  39   friend class JfrRepository;
  40  private:
  41   JfrChunkState* _chunkstate;
  42 
  43   bool open(bool vm_error);
  44   size_t close(intptr_t metadata_offset);
  45   void write_header(intptr_t metadata_offset);
  46   void set_chunk_path(const char* chunk_path);
  47 
  48  public:
  49   JfrChunkWriter();
  50   bool initialize();
  51   intptr_t size_written() const;
  52   intptr_t previous_checkpoint_offset() const;
  53   void set_previous_checkpoint_offset(intptr_t offset);
  54   void time_stamp_chunk_now();
  55 };
  56 
  57 #endif // SHARE_JFR_RECORDER_REPOSITORY_JFRCHUNKWRITER_HPP