1 /* 2 * Copyright (c) 2002, 2010, 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_GC_IMPLEMENTATION_SHARED_ISGCACTIVEMARK_HPP 26 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_ISGCACTIVEMARK_HPP 27 28 #ifndef SERIALGC 29 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp" 30 #endif 31 32 // This class provides a method for block structured setting of the 33 // _is_gc_active state without requiring accessors in CollectedHeap 34 35 class IsGCActiveMark : public StackObj { 36 public: 37 IsGCActiveMark() { 38 CollectedHeap* heap = Universe::heap(); 39 assert(!heap->is_gc_active(), "Not reentrant"); 40 heap->_is_gc_active = true; 41 } 42 43 ~IsGCActiveMark() { 44 CollectedHeap* heap = Universe::heap(); 45 assert(heap->is_gc_active(), "Sanity"); 46 heap->_is_gc_active = false; 47 } 48 }; 49 50 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_ISGCACTIVEMARK_HPP