1 /* 2 * Copyright (c) 2015, 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_MEMORY_STRONGROOTSSCOPE_HPP 26 #define SHARE_VM_MEMORY_STRONGROOTSSCOPE_HPP 27 28 // Some collectors will perform "process_strong_roots" in parallel. 29 // Such a call will involve claiming some fine-grained tasks, such as 30 // scanning of threads and code blobs. 31 // Claiming of these tasks requires that sequential code calls 32 // initialization methods to set the claiming code in the right 33 // state for parallel task claiming. 34 // StrongRootsScope and MarkScope provide ways to capture such 35 // setup code to make sure that it is executed in the correct way. 36 37 class MarkScope : public StackObj { 38 protected: 39 bool _active; 40 public: 41 MarkScope(bool activate = true); 42 ~MarkScope(); 43 }; 44 45 class StrongRootsScope : public MarkScope { 46 public: 47 StrongRootsScope(bool activate = true); 48 ~StrongRootsScope(); 49 }; 50 51 #endif // SHARE_VM_MEMORY_STRONGROOTSSCOPE_HPP