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_JVMFLAGWRITEABLE_HPP 26 #define SHARE_VM_RUNTIME_JVMFLAGWRITEABLE_HPP 27 28 #include "utilities/growableArray.hpp" 29 30 class JVMFlagWriteable : public CHeapObj<mtArguments> { 31 public: 32 enum WriteableType { 33 // can be set without any limits 34 Always = 0, 35 // can only be set once, either via command lines or during runtime 36 Once = 1, 37 // can only be set on command line (multiple times allowed) 38 CommandLineOnly = 2 39 }; 40 private: 41 const char* _name; 42 WriteableType _type; 43 bool _writeable; 44 bool _startup_done; 45 public: 46 // the "name" argument must be a string literal JVMFlagWriteable(const char * name,WriteableType type)47 JVMFlagWriteable(const char* name, WriteableType type) { _name=name; _type=type; _writeable=true; _startup_done=false; } ~JVMFlagWriteable()48 ~JVMFlagWriteable() {} name()49 const char* name() { return _name; } type()50 const WriteableType type() { return _type; } 51 bool is_writeable(void); 52 void mark_once(void); 53 void mark_startup(void); 54 }; 55 56 class JVMFlagWriteableList : public AllStatic { 57 static GrowableArray<JVMFlagWriteable*>* _controls; 58 public: 59 static void init(); length()60 static int length() { return (_controls != NULL) ? _controls->length() : 0; } at(int i)61 static JVMFlagWriteable* at(int i) { return (_controls != NULL) ? _controls->at(i) : NULL; } 62 static JVMFlagWriteable* find(const char* name); add(JVMFlagWriteable * range)63 static void add(JVMFlagWriteable* range) { _controls->append(range); } 64 static void mark_startup(void); 65 }; 66 67 #endif // SHARE_VM_RUNTIME_JVMFLAGWRITEABLE_HPP 68