1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/services/memPtr.cpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,42 @@
1.4 +/*
1.5 + * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#include "precompiled.hpp"
1.29 +#include "services/memPtr.hpp"
1.30 +#include "services/memTracker.hpp"
1.31 +
1.32 +volatile jint SequenceGenerator::_seq_number = 1;
1.33 +volatile unsigned long SequenceGenerator::_generation = 1;
1.34 +NOT_PRODUCT(jint SequenceGenerator::_max_seq_number = 1;)
1.35 +
1.36 +jint SequenceGenerator::next() {
1.37 + jint seq = Atomic::add(1, &_seq_number);
1.38 + if (seq < 0) {
1.39 + MemTracker::shutdown(MemTracker::NMT_sequence_overflow);
1.40 + } else {
1.41 + NOT_PRODUCT(_max_seq_number = (seq > _max_seq_number) ? seq : _max_seq_number;)
1.42 + }
1.43 + return seq;
1.44 +}
1.45 +
