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1 /*
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2 * Copyright 2002 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 // This class provides a method for block structured setting of the
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26 // _is_gc_active state without requiring accessors in CollectedHeap
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27
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28 class IsGCActiveMark : public StackObj {
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29 public:
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30 IsGCActiveMark() {
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31 CollectedHeap* heap = Universe::heap();
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32 assert(!heap->is_gc_active(), "Not reentrant");
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33 heap->_is_gc_active = true;
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34 }
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35
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36 ~IsGCActiveMark() {
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37 CollectedHeap* heap = Universe::heap();
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38 assert(heap->is_gc_active(), "Sanity");
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39 heap->_is_gc_active = false;
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40 }
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41 };
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