commandLineFlagWriteableList.hpp revision 11219:137319683e94 
1/*
2 * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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23 */
24
25#ifndef SHARE_VM_RUNTIME_COMMANDLINEFLAGWRITEABLE_HPP
26#define SHARE_VM_RUNTIME_COMMANDLINEFLAGWRITEABLE_HPP
27
28#include "runtime/globals.hpp"
29#include "utilities/growableArray.hpp"
30
31class CommandLineFlagWriteable : public CHeapObj<mtArguments> {
32public:
33  enum WriteableType {
34    // can be set without any limits
35    Always           = 0,
36    // can only be set once, either via command lines or during runtime
37    Once             = 1,
38    // can only be set on command line (multiple times allowed)
39    CommandLineOnly  = 2
40  };
41private:
42  const char* _name;
43  WriteableType _type;
44  bool _writeable;
45  bool _startup_done;
46public:
47  // the "name" argument must be a string literal
48  CommandLineFlagWriteable(const char* name, WriteableType type) { _name=name; _type=type; _writeable=true; _startup_done=false; }
49  ~CommandLineFlagWriteable() {}
50  const char* name() { return _name; }
51  const WriteableType type() { return _type; }
52  bool is_writeable(void);
53  void mark_once(void);
54  void mark_startup(void);
55};
56
57class CommandLineFlagWriteableList : public AllStatic {
58  static GrowableArray<CommandLineFlagWriteable*>* _controls;
59public:
60  static void init();
61  static int length() { return (_controls != NULL) ? _controls->length() : 0; }
62  static CommandLineFlagWriteable* at(int i) { return (_controls != NULL) ? _controls->at(i) : NULL; }
63  static CommandLineFlagWriteable* find(const char* name);
64  static void add(CommandLineFlagWriteable* range) { _controls->append(range); }
65  static void mark_startup(void);
66};
67
68#endif // SHARE_VM_RUNTIME_COMMANDLINEFLAGWRITEABLE_HPP
69