/*

 * Copyright (c) 2017, 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.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 *

 */

#include "precompiled.hpp"

#include "jfr/recorder/checkpoint/jfrCheckpointBlob.hpp"

#include "jfr/recorder/checkpoint/jfrCheckpointWriter.hpp"

JfrCheckpointBlob::JfrCheckpointBlob(const u1* checkpoint, size_t size) :

  _checkpoint(JfrCHeapObj::new_array<u1>(size)),

  _size(size),

  _next(),

  _written(false) {

  assert(checkpoint != NULL, "invariant");

  assert(_checkpoint != NULL, "invariant");

  memcpy(const_cast<u1*>(_checkpoint), checkpoint, size);

}

JfrCheckpointBlob::~JfrCheckpointBlob() {

  JfrCHeapObj::free(const_cast<u1*>(_checkpoint), _size);

}

const JfrCheckpointBlobHandle& JfrCheckpointBlob::next() const {

  return _next;

}

void JfrCheckpointBlob::write_this(JfrCheckpointWriter& writer) const {

  writer.bytes(_checkpoint, _size);

}

void JfrCheckpointBlob::exclusive_write(JfrCheckpointWriter& writer) const {

  if (!_written) {

    write_this(writer);

    _written = true;

  }

  if (_next.valid()) {

    _next->exclusive_write(writer);

  }

}

void JfrCheckpointBlob::write(JfrCheckpointWriter& writer) const {

  write_this(writer);

  if (_next.valid()) {

    _next->write(writer);

  }

}

void JfrCheckpointBlob::reset_write_state() const {

  if (_written) {

    _written = false;

  }

  if (_next.valid()) {

    _next->reset_write_state();

  }

}

void JfrCheckpointBlob::set_next(const JfrCheckpointBlobHandle& ref) {

  if (_next == ref) {

    return;

  }

  assert(_next != ref, "invariant");

  if (_next.valid()) {

    _next->set_next(ref);

    return;

  }

  _next = ref;

}

JfrCheckpointBlobHandle JfrCheckpointBlob::make(const u1* checkpoint, size_t size) {

  const JfrCheckpointBlob* cp_blob = new JfrCheckpointBlob(checkpoint, size);

  assert(cp_blob != NULL, "invariant");

  return JfrCheckpointBlobReference::make(cp_blob);

}