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.

    18  *

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

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

    21  * questions.

    22  *

    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 

    31 class CommandLineFlagWriteable : public CHeapObj<mtArguments> {

    32 public:

    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   };

    41 private:

    42   const char* _name;

    43   WriteableType _type;

    44   bool _writeable;

    45   bool _startup_done;

    46 public:

    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 

    57 class CommandLineFlagWriteableList : public AllStatic {

    58   static GrowableArray<CommandLineFlagWriteable*>* _controls;

    59 public:

    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