|
1 /* |
|
2 * Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). |
|
3 * All rights reserved. |
|
4 * This component and the accompanying materials are made available |
|
5 * under the terms of "Eclipse Public License v1.0" |
|
6 * which accompanies this distribution, and is available |
|
7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
|
8 * |
|
9 * Initial Contributors: |
|
10 * Nokia Corporation - initial contribution. |
|
11 * |
|
12 * Contributors: |
|
13 * |
|
14 * Description: Store for singletons |
|
15 * |
|
16 */ |
|
17 |
|
18 |
|
19 |
|
20 |
|
21 // INCLUDE FILES |
|
22 #include "glxsingletonstore.h" |
|
23 |
|
24 #include <glxlog.h> |
|
25 |
|
26 // ----------------------------------------------------------------------------- |
|
27 // Constructor |
|
28 // ----------------------------------------------------------------------------- |
|
29 // |
|
30 CGlxSingletonStore::CGlxSingletonStore() |
|
31 { |
|
32 GLX_LOG_INFO("CGlxSingletonStore::CGlxSingletonStore"); |
|
33 } |
|
34 |
|
35 // ----------------------------------------------------------------------------- |
|
36 // return new instance |
|
37 // ----------------------------------------------------------------------------- |
|
38 // |
|
39 EXPORT_C CGlxSingletonStore* CGlxSingletonStore::InstanceLC() |
|
40 { |
|
41 CGlxSingletonStore* store = reinterpret_cast<CGlxSingletonStore*>(Dll::Tls()); |
|
42 |
|
43 // Create new object, if one has not been created previously |
|
44 if ( !store ) |
|
45 { |
|
46 store = new (ELeave) CGlxSingletonStore; |
|
47 |
|
48 // Store in tls pointer |
|
49 Dll::SetTls( reinterpret_cast<TAny*>(store)); |
|
50 } |
|
51 |
|
52 // Push to cleanup stack - will make sure tls pointer is cleared if |
|
53 // something leaves |
|
54 CleanupStack::PushL( TCleanupItem(&Cleanup, store) ); |
|
55 |
|
56 return store; |
|
57 } |
|
58 |
|
59 // ----------------------------------------------------------------------------- |
|
60 // Cleanup function |
|
61 // ----------------------------------------------------------------------------- |
|
62 // |
|
63 void CGlxSingletonStore::Cleanup( TAny* /*aStore*/ ) |
|
64 { |
|
65 // In case of one singleton owning another there can be nested calls to |
|
66 // CGlxSingletonStore::InstanceL, and so multiple Cleanup items on the |
|
67 // stack to delete the store. |
|
68 // Get the store pointer from TLS to ensure it hasn't already been deleted |
|
69 CGlxSingletonStore* obj |
|
70 = reinterpret_cast<CGlxSingletonStore*>( Dll::Tls() ); |
|
71 |
|
72 // Delete the object if instance was just created, and singleton |
|
73 // was _not_ successfully added |
|
74 if ( obj && obj->iSingletons.Count() == 0 ) |
|
75 { |
|
76 delete obj; |
|
77 } |
|
78 |
|
79 GLX_LOG_WARNING("Singleton factory function has (probably) left"); |
|
80 } |
|
81 |
|
82 // ----------------------------------------------------------------------------- |
|
83 // Destructor |
|
84 // ----------------------------------------------------------------------------- |
|
85 // |
|
86 EXPORT_C CGlxSingletonStore::~CGlxSingletonStore() |
|
87 { |
|
88 GLX_LOG_INFO("CGlxSingletonStore::~CGlxSingletonStore"); |
|
89 |
|
90 // Delete remaining objects, if any |
|
91 TInt count = iSingletons.Count(); |
|
92 for (TInt i = 0; i < count; i++) |
|
93 { |
|
94 delete iSingletons[i].iObject; |
|
95 } |
|
96 |
|
97 // Close the singletons array |
|
98 iSingletons.Close(); |
|
99 |
|
100 // Clear tls pointer |
|
101 Dll::SetTls( NULL ); |
|
102 } |
|
103 |
|
104 // ----------------------------------------------------------------------------- |
|
105 // Decrement reference count, and potentially delete object(s) |
|
106 // ----------------------------------------------------------------------------- |
|
107 // |
|
108 EXPORT_C void CGlxSingletonStore::Close(CBase* aObj) |
|
109 { |
|
110 CGlxSingletonStore* store = reinterpret_cast<CGlxSingletonStore*>(Dll::Tls()); |
|
111 if ( store ) |
|
112 { |
|
113 // Find an object by type |
|
114 TInt count = store->iSingletons.Count(); |
|
115 TInt i = 0; |
|
116 while ( i < count ) |
|
117 { |
|
118 TSingleton& singleton = store->iSingletons[i]; |
|
119 if ( aObj == singleton.iObject ) |
|
120 { |
|
121 // Found an existing object of type T |
|
122 // Remove reference |
|
123 singleton.iReferenceCount--; |
|
124 GLX_LOG_INFO2("CGlxSingletonStore::Close, Ref count %d, %x", singleton.iReferenceCount, singleton.iObject); |
|
125 |
|
126 // Delete object if no more references |
|
127 if ( !singleton.iReferenceCount ) |
|
128 { |
|
129 store->iSingletons.Remove(i); |
|
130 |
|
131 // Delete store object if last singleton |
|
132 if ( store->iSingletons.Count() == 0 ) |
|
133 { |
|
134 // CGlxSingletonStore destructor will clean up DLL's TLS pointer |
|
135 delete store; |
|
136 } |
|
137 |
|
138 delete aObj; |
|
139 } |
|
140 break; |
|
141 } |
|
142 i++; |
|
143 } |
|
144 } |
|
145 else |
|
146 { |
|
147 GLX_LOG_ERROR("CGlxSingletonStore::Close - Too many calls to Close()"); |
|
148 } |
|
149 } |