duke@435: /*
mikael@6198:  * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
duke@435:  *
duke@435:  */
duke@435: 
stefank@2314: #ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_ISGCACTIVEMARK_HPP
stefank@2314: #define SHARE_VM_GC_IMPLEMENTATION_SHARED_ISGCACTIVEMARK_HPP
stefank@2314: 
jprovino@4542: #include "utilities/macros.hpp"
jprovino@4542: #if INCLUDE_ALL_GCS
stefank@2314: #include "gc_implementation/parallelScavenge/parallelScavengeHeap.hpp"
jprovino@4542: #endif // INCLUDE_ALL_GCS
stefank@2314: 
duke@435: // This class provides a method for block structured setting of the
duke@435: // _is_gc_active state without requiring accessors in CollectedHeap
duke@435: 
duke@435: class IsGCActiveMark : public StackObj {
duke@435:  public:
duke@435:   IsGCActiveMark() {
duke@435:     CollectedHeap* heap = Universe::heap();
duke@435:     assert(!heap->is_gc_active(), "Not reentrant");
duke@435:     heap->_is_gc_active = true;
duke@435:   }
duke@435: 
duke@435:   ~IsGCActiveMark() {
duke@435:     CollectedHeap* heap = Universe::heap();
duke@435:     assert(heap->is_gc_active(), "Sanity");
duke@435:     heap->_is_gc_active = false;
duke@435:   }
duke@435: };
stefank@2314: 
stefank@2314: #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_ISGCACTIVEMARK_HPP