1 /* 2 * Copyright (c) 2014, 2015, 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 #include "precompiled.hpp" 26 #include "gc/shared/gcId.hpp" 27 28 uint GCId::_next_id = 0; 29 uint GCId::_current_id = UNDEFINED; 30 31 const uint GCId::create() { 32 return _next_id++; 33 } 34 35 const uint GCId::current() { 36 assert(_current_id != UNDEFINED, "Using undefined GC ID"); 37 return _current_id; 38 } 39 40 GCIdMark::GCIdMark() { 41 _previous_gc_id = GCId::_current_id; 42 uint gc_id = GCId::create(); 43 GCId::set_current(gc_id); 44 DEBUG_ONLY(_gc_id = gc_id;) 45 } 46 47 GCIdMark::~GCIdMark() { 48 assert(_gc_id == GCId::_current_id, err_msg("GCIdMarks for %u and %u overlap.", _gc_id, GCId::_current_id)); 49 GCId::set_current(_previous_gc_id); 50 } 51