/*

 * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

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#ifndef SHARE_VM_JFR_RECORDER_CHECKPOINT_JFRCHECKPOINTBLOB_HPP

#define SHARE_VM_JFR_RECORDER_CHECKPOINT_JFRCHECKPOINTBLOB_HPP

#include "jfr/utilities/jfrAllocation.hpp"

#include "jfr/utilities/jfrRefCountPointer.hpp"

class JfrCheckpointBlob;

class JfrCheckpointWriter;

typedef RefCountPointer<JfrCheckpointBlob, MultiThreadedRefCounter> JfrCheckpointBlobReference;

typedef RefCountHandle<JfrCheckpointBlobReference> JfrCheckpointBlobHandle;

class JfrCheckpointBlob : public JfrCHeapObj {

  template <typename, typename>

  friend class RefCountPointer;

 private:

  const u1* _checkpoint;

  const size_t _size;

  JfrCheckpointBlobHandle _next;

  mutable bool _written;

  JfrCheckpointBlob(const u1* checkpoint, size_t size);

  ~JfrCheckpointBlob();

  const JfrCheckpointBlobHandle& next() const;

  void write_this(JfrCheckpointWriter& writer) const;

 public:

  void write(JfrCheckpointWriter& writer) const;

  void exclusive_write(JfrCheckpointWriter& writer) const;

  void reset_write_state() const;

  void set_next(const JfrCheckpointBlobHandle& ref);

  static JfrCheckpointBlobHandle make(const u1* checkpoint, size_t size);

};

#endif // SHARE_VM_JFR_RECORDER_CHECKPOINT_JFRCHECKPOINTBLOB_HPP