Mercurial > hg > graal-compiler
annotate agent/src/share/classes/sun/jvm/hotspot/utilities/MessageQueue.java @ 2426:1d1603768966
7010070: Update all 2010 Oracle-changed OpenJDK files to have the proper copyright dates - second pass
Summary: Update the copyright to be 2010 on all changed files in OpenJDK
Reviewed-by: ohair
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date | Tue, 05 Apr 2011 14:12:31 -0700 |
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2 * Copyright (c) 2000, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 package sun.jvm.hotspot.utilities; | |
26 | |
27 /** <p> A two-way unbounded-length message queue useful for | |
28 communication between threads. Messages written on one side become | |
29 readable on the other in first-in, first-out order. This is an | |
30 interface to one of two "sides" of an underlying backend, for | |
31 example, the MessageQueueBackend. </p> */ | |
32 | |
33 public interface MessageQueue { | |
34 /** This blocks until a message is available. Even if the thread is | |
35 interrupted while it is waiting, this will not return until a | |
36 message is written by the entity on the other side of the | |
37 queue. */ | |
38 public Object readMessage(); | |
39 | |
40 /** This blocks for up to <code>millis</code> milliseconds until a | |
41 message is available. If no message becomes available within | |
42 this time period, or the thread is interrupted during the wait, | |
43 returns null. (This implies that passing the value null back and | |
44 forth is not distinguishable with this method.) Passing a value | |
45 of 0 for the <code>millis</code> argument causes this method to | |
46 return without blocking. The millis argument must be greater | |
47 than or equal to zero. */ | |
48 public Object readMessageWithTimeout(long millis); | |
49 | |
50 /** Write a message to the queue */ | |
51 public void writeMessage(Object obj); | |
52 } |