1//
2//  ========================================================================
3//  Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
4//  ------------------------------------------------------------------------
5//  All rights reserved. This program and the accompanying materials
6//  are made available under the terms of the Eclipse Public License v1.0
7//  and Apache License v2.0 which accompanies this distribution.
8//
9//      The Eclipse Public License is available at
10//      http://www.eclipse.org/legal/epl-v10.html
11//
12//      The Apache License v2.0 is available at
13//      http://www.opensource.org/licenses/apache2.0.php
14//
15//  You may elect to redistribute this code under either of these licenses.
16//  ========================================================================
17//
18
19package org.eclipse.jetty.util;
20
21import java.util.concurrent.atomic.AtomicInteger;
22import java.util.concurrent.atomic.AtomicLong;
23
24public class Atomics
25{
26    private Atomics()
27    {
28    }
29
30    public static void updateMin(AtomicLong currentMin, long newValue)
31    {
32        long oldValue = currentMin.get();
33        while (newValue < oldValue)
34        {
35            if (currentMin.compareAndSet(oldValue, newValue))
36                break;
37            oldValue = currentMin.get();
38        }
39    }
40
41    public static void updateMax(AtomicLong currentMax, long newValue)
42    {
43        long oldValue = currentMax.get();
44        while (newValue > oldValue)
45        {
46            if (currentMax.compareAndSet(oldValue, newValue))
47                break;
48            oldValue = currentMax.get();
49        }
50    }
51
52    public static void updateMin(AtomicInteger currentMin, int newValue)
53    {
54        int oldValue = currentMin.get();
55        while (newValue < oldValue)
56        {
57            if (currentMin.compareAndSet(oldValue, newValue))
58                break;
59            oldValue = currentMin.get();
60        }
61    }
62
63    public static void updateMax(AtomicInteger currentMax, int newValue)
64    {
65        int oldValue = currentMax.get();
66        while (newValue > oldValue)
67        {
68            if (currentMax.compareAndSet(oldValue, newValue))
69                break;
70            oldValue = currentMax.get();
71        }
72    }
73}
74