/*

 * 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.

 *

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

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 */

#ifndef SHARE_VM_JFR_WRITERS_JFRMEMORYWRITERHOST_HPP

#define SHARE_VM_JFR_WRITERS_JFRMEMORYWRITERHOST_HPP

#include "jfr/writers/jfrStorageHost.inline.hpp"

#ifdef ASSERT

class ExclusiveAccessAssert {

 private:

  bool _acquired;

 public:

  ExclusiveAccessAssert() : _acquired(false) {}

  void acquire() { assert_non_acquired(); _acquired = true; }

  void release() { assert_acquired(); _acquired = false; }

  bool is_acquired() const { return _acquired; }

  void assert_acquired() const { assert(_acquired, "Not acquired!"); }

  void assert_non_acquired() const { assert(!_acquired, "Already acquired!"); }

};

#else

 class ExclusiveAccessAssert {};

#endif

template <typename Adapter, typename AP, typename AccessAssert = ExclusiveAccessAssert>

class MemoryWriterHost : public StorageHost<Adapter, AP> {

  debug_only(AccessAssert _access;)

 public:

  typedef typename Adapter::StorageType StorageType;

 protected:

  void bytes(void* dest, const void* buf, size_t len);

  MemoryWriterHost(StorageType* storage, Thread* thread);

  MemoryWriterHost(StorageType* storage, size_t size);

  MemoryWriterHost(Thread* thread);

  debug_only(bool is_acquired() const;)

 public:

  void acquire();

  void release();

};

template <typename Adapter, typename AP>

class AcquireReleaseMemoryWriterHost : public MemoryWriterHost<Adapter, AP> {

 public:

  typedef typename Adapter::StorageType StorageType;

  AcquireReleaseMemoryWriterHost(StorageType* storage, Thread* thread);

  AcquireReleaseMemoryWriterHost(StorageType* storage, size_t size);

  AcquireReleaseMemoryWriterHost(Thread* thread);

  ~AcquireReleaseMemoryWriterHost();

};

#endif // SHARE_VM_JFR_WRITERS_JFRMEMORYWRITERHOST_HPP