/*

 * Copyright (c) 2015, 2016, 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_RUNTIME_COMMANDLINEFLAGWRITEABLE_HPP

#define SHARE_VM_RUNTIME_COMMANDLINEFLAGWRITEABLE_HPP

#include "runtime/globals.hpp"

#include "utilities/growableArray.hpp"

class CommandLineFlagWriteable : public CHeapObj<mtArguments> {

public:

  enum WriteableType {

    // can be set without any limits

    Always           = 0,

    // can only be set once, either via command lines or during runtime

    Once             = 1,

    // can only be set on command line (multiple times allowed)

    CommandLineOnly  = 2

  };

private:

  const char* _name;

  WriteableType _type;

  bool _writeable;

  bool _startup_done;

public:

  // the "name" argument must be a string literal

  CommandLineFlagWriteable(const char* name, WriteableType type) { _name=name; _type=type; _writeable=true; _startup_done=false; }

  ~CommandLineFlagWriteable() {}

  const char* name() { return _name; }

  const WriteableType type() { return _type; }

  bool is_writeable(void);

  void mark_once(void);

  void mark_startup(void);

};

class CommandLineFlagWriteableList : public AllStatic {

  static GrowableArray<CommandLineFlagWriteable*>* _controls;

public:

  static void init();

  static int length() { return (_controls != NULL) ? _controls->length() : 0; }

  static CommandLineFlagWriteable* at(int i) { return (_controls != NULL) ? _controls->at(i) : NULL; }

  static CommandLineFlagWriteable* find(const char* name);

  static void add(CommandLineFlagWriteable* range) { _controls->append(range); }

  static void mark_startup(void);

};

#endif // SHARE_VM_RUNTIME_COMMANDLINEFLAGWRITEABLE_HPP