/*

 * Copyright (c) 2016, 2019, 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.

 *

 */

#ifndef SHARE_JFR_RECORDER_STORAGE_JFRSTORAGEUTILS_INLINE_HPP

#define SHARE_JFR_RECORDER_STORAGE_JFRSTORAGEUTILS_INLINE_HPP

#include "jfr/recorder/storage/jfrStorageUtils.hpp"

#include "runtime/thread.inline.hpp"

template <typename T>

inline bool UnBufferedWriteToChunk<T>::write(T* t, const u1* data, size_t size) {

  _writer.write_unbuffered(data, size);

  return true;

}

template <typename T>

inline bool DefaultDiscarder<T>::discard(T* t, const u1* data, size_t size) {

  return true;

}

template <typename Operation>

inline bool ConcurrentWriteOp<Operation>::process(typename Operation::Type* t) {

  const u1* const current_top = t->concurrent_top();

  const size_t unflushed_size = t->pos() - current_top;

  if (unflushed_size == 0) {

    t->set_concurrent_top(current_top);

    return true;

  }

  const bool result = _operation.write(t, current_top, unflushed_size);

  t->set_concurrent_top(current_top + unflushed_size);

  return result;

}

template <typename Operation>

inline bool MutexedWriteOp<Operation>::process(typename Operation::Type* t) {

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

  const u1* const current_top = t->top();

  const size_t unflushed_size = t->pos() - current_top;

  if (unflushed_size == 0) {

    return true;

  }

  const bool result = _operation.write(t, current_top, unflushed_size);

  t->set_top(current_top + unflushed_size);

  return result;

}

template <typename Type>

static void retired_sensitive_acquire(Type* t) {

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

  if (t->retired()) {

    return;

  }

  Thread* const thread = Thread::current();

  while (!t->try_acquire(thread)) {

    if (t->retired()) {

      return;

    }

  }

}

template <typename Operation>

inline bool ExclusiveOp<Operation>::process(typename Operation::Type* t) {

  retired_sensitive_acquire(t);

  assert(t->acquired_by_self() || t->retired(), "invariant");

  // User is required to ensure proper release of the acquisition

  return MutexedWriteOp<Operation>::process(t);

}

template <typename Operation>

inline bool DiscardOp<Operation>::process(typename Operation::Type* t) {

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

  const u1* const current_top = _mode == concurrent ? t->concurrent_top() : t->top();

  const size_t unflushed_size = t->pos() - current_top;

  if (unflushed_size == 0) {

    if (_mode == concurrent) {

      t->set_concurrent_top(current_top);

    }

    return true;

  }

  const bool result = _operation.discard(t, current_top, unflushed_size);

  if (_mode == concurrent) {

    t->set_concurrent_top(current_top + unflushed_size);

  } else {

    t->set_top(current_top + unflushed_size);

  }

  return result;

}

#endif // SHARE_JFR_RECORDER_STORAGE_JFRSTORAGEUTILS_INLINE_HPP