01: /*
02: * <copyright>
03: *
04: * Copyright 1997-2004 BBNT Solutions, LLC
05: * under sponsorship of the Defense Advanced Research Projects
06: * Agency (DARPA).
07: *
08: * You can redistribute this software and/or modify it under the
09: * terms of the Cougaar Open Source License as published on the
10: * Cougaar Open Source Website (www.cougaar.org).
11: *
12: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
13: * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
14: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
15: * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
16: * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
17: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
18: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
22: * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23: *
24: * </copyright>
25: */
26:
27: package org.cougaar.core.thread;
28:
29: /**
30: * Defines a set of Schedulable state constants. The only states
31: * supported right now are RUNNING (active), PENDING (queued), and
32: * DORMANT (neither). We may eventually have a use for DISQUALIFIED
33: * (the ThreadControlService has prevented it from running).
34: * SUSPENDED is here for historical reasons and will almost never be
35: * supported.
36: *
37: * Note that these states are purely for informational purposes.
38: * They're not used internally in any way.
39: */
40: public interface CougaarThread {
41:
42: /**
43: * The Schedulable is currently running.
44: */
45: public static final int THREAD_RUNNING = 0;
46:
47: /**
48: * Not supported, but would in theory mean the Schedulable has
49: suspended itself.
50: */
51: public static final int THREAD_SUSPENDED = 1;
52:
53: /**
54: * The Schedulable is currently queued.
55: */
56: public static final int THREAD_PENDING = 2;
57:
58: /**
59: * The Schedulable is qualified but neither running nor queued.
60: */
61: public static final int THREAD_DORMANT = 3;
62:
63: /**
64: * The Schedulable has been disqualified by the ThreadControlService.
65: */
66: public static final int THREAD_DISQUALIFIED = 4;
67:
68: }
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