isGCActiveMark.hpp revision 1472
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk/*
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved.
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk *
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk * This code is free software; you can redistribute it and/or modify it
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk * under the terms of the GNU General Public License version 2 only, as
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk * published by the Free Software Foundation.
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk *
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk * This code is distributed in the hope that it will be useful, but WITHOUT
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk * version 2 for more details (a copy is included in the LICENSE file that
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk * accompanied this code).
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk *
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk * You should have received a copy of the GNU General Public License version
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk * 2 along with this work; if not, write to the Free Software Foundation,
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk *
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk * or visit www.oracle.com if you need additional information or have any
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk * questions.
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk *
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk */
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk// This class provides a method for block structured setting of the
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk// _is_gc_active state without requiring accessors in CollectedHeap
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenkclass IsGCActiveMark : public StackObj {
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk public:
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk IsGCActiveMark() {
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk CollectedHeap* heap = Universe::heap();
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk assert(!heap->is_gc_active(), "Not reentrant");
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk heap->_is_gc_active = true;
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk }
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk ~IsGCActiveMark() {
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk CollectedHeap* heap = Universe::heap();
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk assert(heap->is_gc_active(), "Sanity");
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk heap->_is_gc_active = false;
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk }
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk};
c1350cf5bc50458ba79cc93ff9e0e5fe3f1aeeb0jeff.schenk