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1 /***** BEGIN LICENSE BLOCK *****
2  * Version: CPL 1.0/GPL 2.0/LGPL 2.1
3  *
4  * The contents of this file are subject to the Common Public
5  * License Version 1.0 (the "License"); you may not use this file
6  * except in compliance with the License. You may obtain a copy of
7  * the License at http://www.eclipse.org/legal/cpl-v10.html
8  *
9  * Software distributed under the License is distributed on an "AS
10  * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
11  * implied. See the License for the specific language governing
12  * rights and limitations under the License.
13  *
14  * Copyright (C) 2004 Charles O Nutter <headius@headius.com>
15  * Copyright (C) 2004 Jan Arne Petersen <jpetersen@uni-bonn.de>
16  * Copyright (C) 2004 Stefan Matthias Aust <sma@3plus4.de>
17  *
18  * Alternatively, the contents of this file may be used under the terms of
19  * either of the GNU General Public License Version 2 or later (the "GPL"),
20  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
21  * in which case the provisions of the GPL or the LGPL are applicable instead
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27  * the provisions above, a recipient may use your version of this file under
28  * the terms of any one of the CPL, the GPL or the LGPL.
29  ***** END LICENSE BLOCK *****/
30 package org.jruby;
31
32 import java.util.HashMap JavaDoc;
33 import java.util.Map JavaDoc;
34
35 import org.jruby.runtime.Block;
36 import org.jruby.runtime.CallbackFactory;
37 import org.jruby.runtime.ObjectAllocator;
38 import org.jruby.runtime.builtin.IRubyObject;
39
40 /**
41  * Implementation of Ruby's <code>ThreadGroup</code> class. This is currently
42  * just a stub.
43  * <p>
44  *
45  * @author Charles O Nutter (headius@headius.com)
46  */
47 public class RubyThreadGroup extends RubyObject {
48     private Map JavaDoc rubyThreadList = new HashMap JavaDoc();
49     private boolean enclosed = false;
50
51     // ENEBO: Can these be fast?
52 public static RubyClass createThreadGroupClass(Ruby runtime) {
53         RubyClass threadGroupClass = runtime.defineClass("ThreadGroup", runtime.getObject(), ObjectAllocator.NOT_ALLOCATABLE_ALLOCATOR);
54         CallbackFactory callbackFactory = runtime.callbackFactory(RubyThreadGroup.class);
55         
56         threadGroupClass.defineMethod("add", callbackFactory.getMethod("add", RubyThread.class));
57         threadGroupClass.defineMethod("enclose", callbackFactory.getMethod("enclose"));
58         threadGroupClass.defineMethod("enclosed?", callbackFactory.getMethod("isEnclosed"));
59         threadGroupClass.defineMethod("list", callbackFactory.getMethod("list"));
60         threadGroupClass.getMetaClass().defineMethod("new", callbackFactory.getSingletonMethod("newInstance"));
61         
62         // create the default thread group
63 RubyThreadGroup defaultThreadGroup = new RubyThreadGroup(runtime, threadGroupClass);
64         threadGroupClass.defineConstant("Default", defaultThreadGroup);
65
66         return threadGroupClass;
67     }
68     
69     public static IRubyObject newInstance(IRubyObject recv, Block block) {
70         return new RubyThreadGroup(recv.getRuntime(), (RubyClass)recv);
71     }
72
73     public IRubyObject add(RubyThread rubyThread, Block block) {
74         if (isFrozen()) {
75             throw getRuntime().newTypeError("can't add to frozen ThreadGroup");
76         }
77         
78         if (rubyThread.group() != getRuntime().getNil()) {
79             RubyThreadGroup threadGroup = (RubyThreadGroup)rubyThread.group();
80             threadGroup.rubyThreadList.remove(new Integer JavaDoc(System.identityHashCode(rubyThread)));
81         }
82         
83         rubyThread.setThreadGroup(this);
84         rubyThreadList.put(new Integer JavaDoc(System.identityHashCode(rubyThread)), rubyThread);
85     
86         return this;
87     }
88     
89     public void remove(RubyThread rubyThread) {
90         rubyThread.setThreadGroup(null);
91         rubyThreadList.remove(new Integer JavaDoc(System.identityHashCode(rubyThread)));
92     }
93     
94     public IRubyObject enclose(Block block) {
95         enclosed = true;
96         
97         return this;
98     }
99     
100     public IRubyObject isEnclosed(Block block) {
101         return new RubyBoolean(getRuntime(), enclosed);
102     }
103     
104     public IRubyObject list(Block block) {
105         return getRuntime().newArrayNoCopy((IRubyObject[])rubyThreadList.values().toArray(new IRubyObject[rubyThreadList.size()]));
106     }
107
108     private RubyThreadGroup(Ruby runtime, RubyClass type) {
109         super(runtime, type);
110     }
111
112 }
113
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