1 : /* -*- Mode: c++; tab-width: 2; indent-tabs-mode: nil; -*- */
2 : /* ***** BEGIN LICENSE BLOCK *****
3 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
4 : *
5 : * The contents of this file are subject to the Mozilla Public License Version
6 : * 1.1 (the "License"); you may not use this file except in compliance with
7 : * the License. You may obtain a copy of the License at
8 : * http://www.mozilla.org/MPL/
9 : *
10 : * Software distributed under the License is distributed on an "AS IS" basis,
11 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12 : * for the specific language governing rights and limitations under the
13 : * License.
14 : *
15 : * The Original Code is Widget code.
16 : *
17 : * The Initial Developer of the Original Code is Google Inc.
18 : * Portions created by the Initial Developer are Copyright (C) 2006
19 : * the Initial Developer. All Rights Reserved.
20 : *
21 : * Contributor(s):
22 : * Darin Fisher <darin@meer.net> (original author)
23 : *
24 : * Alternatively, the contents of this file may be used under the terms of
25 : * either the GNU General Public License Version 2 or later (the "GPL"), or
26 : * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
27 : * in which case the provisions of the GPL or the LGPL are applicable instead
28 : * of those above. If you wish to allow use of your version of this file only
29 : * under the terms of either the GPL or the LGPL, and not to allow others to
30 : * use your version of this file under the terms of the MPL, indicate your
31 : * decision by deleting the provisions above and replace them with the notice
32 : * and other provisions required by the GPL or the LGPL. If you do not delete
33 : * the provisions above, a recipient may use your version of this file under
34 : * the terms of any one of the MPL, the GPL or the LGPL.
35 : *
36 : * ***** END LICENSE BLOCK ***** */
37 :
38 : #ifndef nsAppShellSingleton_h__
39 : #define nsAppShellSingleton_h__
40 :
41 : /**
42 : * This file is designed to be included into the file that provides the
43 : * nsIModule implementation for a particular widget toolkit.
44 : *
45 : * The following functions are defined:
46 : * nsAppShellInit
47 : * nsAppShellShutdown
48 : * nsAppShellConstructor
49 : *
50 : * The nsAppShellInit function is designed to be used as a module constructor.
51 : * If you already have a module constructor, then call nsAppShellInit from your
52 : * module constructor.
53 : *
54 : * The nsAppShellShutdown function is designed to be used as a module
55 : * destructor. If you already have a module destructor, then call
56 : * nsAppShellShutdown from your module destructor.
57 : *
58 : * The nsAppShellConstructor function is designed to be used as a factory
59 : * method for the nsAppShell class.
60 : */
61 :
62 : static nsAppShell *sAppShell;
63 :
64 : static nsresult
65 1387 : nsAppShellInit()
66 : {
67 1387 : NS_ASSERTION(!sAppShell, "already initialized");
68 :
69 1387 : sAppShell = new nsAppShell();
70 1387 : if (!sAppShell)
71 0 : return NS_ERROR_OUT_OF_MEMORY;
72 1387 : NS_ADDREF(sAppShell);
73 :
74 1387 : nsresult rv = sAppShell->Init();
75 1387 : if (NS_FAILED(rv)) {
76 0 : NS_RELEASE(sAppShell);
77 0 : return rv;
78 : }
79 :
80 1387 : return NS_OK;
81 : }
82 :
83 : static void
84 1387 : nsAppShellShutdown()
85 : {
86 1387 : NS_RELEASE(sAppShell);
87 1387 : }
88 :
89 : static nsresult
90 16 : nsAppShellConstructor(nsISupports *outer, const nsIID &iid, void **result)
91 : {
92 16 : NS_ENSURE_TRUE(!outer, NS_ERROR_NO_AGGREGATION);
93 16 : NS_ENSURE_TRUE(sAppShell, NS_ERROR_NOT_INITIALIZED);
94 :
95 16 : return sAppShell->QueryInterface(iid, result);
96 : }
97 :
98 : #endif // nsAppShellSingleton_h__
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