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src/share/vm/services/memPtr.cpp@4102b59539ce (annotated)
src/share/vm/services/memPtr.cpp
Fri, 01 Feb 2013 23:48:08 +0100
- author
- ctornqvi
- date
- Fri, 01 Feb 2013 23:48:08 +0100
- changeset 4512
- 4102b59539ce
- parent 4193
- 716c64bda5ba
- child 5666
- baa7927dfbd2
- permissions
- -rw-r--r--
8005012: Add WB APIs to better support NMT testing
Summary: Add WB API functions to enable better NMT testing
Reviewed-by: dholmes, zgu
| zgu@3900 | 1 | /* |
| zgu@3900 | 2 | * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. |
| zgu@3900 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| zgu@3900 | 4 | * |
| zgu@3900 | 5 | * This code is free software; you can redistribute it and/or modify it |
| zgu@3900 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| zgu@3900 | 7 | * published by the Free Software Foundation. |
| zgu@3900 | 8 | * |
| zgu@3900 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| zgu@3900 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| zgu@3900 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| zgu@3900 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| zgu@3900 | 13 | * accompanied this code). |
| zgu@3900 | 14 | * |
| zgu@3900 | 15 | * You should have received a copy of the GNU General Public License version |
| zgu@3900 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| zgu@3900 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| zgu@3900 | 18 | * |
| zgu@3900 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| zgu@3900 | 20 | * or visit www.oracle.com if you need additional information or have any |
| zgu@3900 | 21 | * questions. |
| zgu@3900 | 22 | * |
| zgu@3900 | 23 | */ |
| zgu@3900 | 24 | |
| zgu@3900 | 25 | #include "precompiled.hpp" |
| zgu@3900 | 26 | #include "services/memPtr.hpp" |
| zgu@3900 | 27 | #include "services/memTracker.hpp" |
| zgu@3900 | 28 | |
| zgu@3900 | 29 | volatile jint SequenceGenerator::_seq_number = 1; |
| ctornqvi@4512 | 30 | volatile unsigned long SequenceGenerator::_generation = 1; |
| zgu@3994 | 31 | NOT_PRODUCT(jint SequenceGenerator::_max_seq_number = 1;) |
| zgu@3900 | 32 | |
| zgu@3900 | 33 | jint SequenceGenerator::next() { |
| zgu@3900 | 34 | jint seq = Atomic::add(1, &_seq_number); |
| zgu@3900 | 35 | if (seq < 0) { |
| zgu@3900 | 36 | MemTracker::shutdown(MemTracker::NMT_sequence_overflow); |
| zgu@3900 | 37 | } |
| zgu@3900 | 38 | assert(seq > 0, "counter overflow"); |
| zgu@3994 | 39 | NOT_PRODUCT(_max_seq_number = (seq > _max_seq_number) ? seq : _max_seq_number;) |
| zgu@3900 | 40 | return seq; |
| zgu@3900 | 41 | } |
| zgu@3900 | 42 |
