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source: vbox/trunk/src/libs/xpcom18a4/xpcom/ds/nsClassHashtable.h@ 40023

Last change on this file since 40023 was 40023, checked in by vboxsync, 13 years ago

gcc-4.7 fixes

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1/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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 C++ hashtable templates.
16 *
17 * The Initial Developer of the Original Code is
18 * Benjamin Smedberg.
19 * Portions created by the Initial Developer are Copyright (C) 2002
20 * the Initial Developer. All Rights Reserved.
21 *
22 * Contributor(s):
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 nsClassHashtable_h__
39#define nsClassHashtable_h__
40
41#include "nsBaseHashtable.h"
42#include "nsHashKeys.h"
43#include "nsAutoPtr.h"
44
45/**
46 * templated hashtable class maps keys to C++ object pointers.
47 * See nsBaseHashtable for complete declaration.
48 * @param KeyClass a wrapper-class for the hashtable key, see nsHashKeys.h
49 * for a complete specification.
50 * @param Class the class-type being wrapped
51 * @see nsInterfaceHashtable, nsClassHashtable
52 */
53template<class KeyClass,class T>
54class nsClassHashtable :
55 public nsBaseHashtable< KeyClass, nsAutoPtr<T>, T* >
56{
57public:
58 typedef typename KeyClass::KeyType KeyType;
59 typedef T* UserDataType;
60
61 /**
62 * @copydoc nsBaseHashtable::Get
63 * @param pData if the key doesn't exist, pData will be set to nsnull.
64 */
65 PRBool Get(KeyType aKey, UserDataType* pData) const;
66};
67
68
69/**
70 * Thread-safe version of nsClassHashtable
71 * @param KeyClass a wrapper-class for the hashtable key, see nsHashKeys.h
72 * for a complete specification.
73 * @param Class the class-type being wrapped
74 * @see nsInterfaceHashtable, nsClassHashtable
75 */
76template<class KeyClass,class T>
77class nsClassHashtableMT :
78 public nsBaseHashtableMT< KeyClass, nsAutoPtr<T>, T* >
79{
80public:
81 typedef typename KeyClass::KeyType KeyType;
82 typedef T* UserDataType;
83
84 /**
85 * @copydoc nsBaseHashtable::Get
86 * @param pData if the key doesn't exist, pData will be set to nsnull.
87 */
88 PRBool Get(KeyType aKey, UserDataType* pData) const;
89};
90
91
92//
93// nsClassHashtable definitions
94//
95
96template<class KeyClass,class T>
97PRBool
98nsClassHashtable<KeyClass,T>::Get(KeyType aKey, T** retVal) const
99{
100 typename nsBaseHashtable<KeyClass,nsAutoPtr<T>,T*>::EntryType* ent =
101 this->GetEntry(aKey);
102
103 if (ent)
104 {
105 if (retVal)
106 *retVal = ent->mData;
107
108 return PR_TRUE;
109 }
110
111 if (retVal)
112 *retVal = nsnull;
113
114 return PR_FALSE;
115}
116
117
118//
119// nsClassHashtableMT definitions
120//
121
122template<class KeyClass,class T>
123PRBool
124nsClassHashtableMT<KeyClass,T>::Get(KeyType aKey, T** retVal) const
125{
126 PR_Lock(this->mLock);
127
128 typename nsBaseHashtableMT<KeyClass,nsAutoPtr<T>,T*>::EntryType* ent =
129 this->GetEntry(aKey);
130
131 if (ent)
132 {
133 if (retVal)
134 *retVal = ent->mData;
135
136 PR_Unlock(this->mLock);
137
138 return PR_TRUE;
139 }
140
141 if (retVal)
142 *retVal = nsnull;
143
144 PR_Unlock(this->mLock);
145
146 return PR_FALSE;
147}
148
149#endif // nsClassHashtable_h__
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