1 /* 2 * Copyright (c) 2002, 2013, 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 #include "utilities/macros.hpp" 29 #if INCLUDE_ALL_GCS 30 #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp" 31 #endif // INCLUDE_ALL_GCS 32 33 // This class provides a method for block structured setting of the 34 // _is_gc_active state without requiring accessors in CollectedHeap 35 36 class IsGCActiveMark : public StackObj { 37 public: 38 IsGCActiveMark() { 39 CollectedHeap* heap = Universe::heap(); 40 assert(!heap->is_gc_active(), "Not reentrant"); 41 heap->_is_gc_active = true; 42 } 43 44 ~IsGCActiveMark() { 45 CollectedHeap* heap = Universe::heap(); 46 assert(heap->is_gc_active(), "Sanity"); 47 heap->_is_gc_active = false; 48 } 49 }; 50 51 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_ISGCACTIVEMARK_HPP