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nsClassHashtable.h
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00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
00006  * 1.1 (the "License"); you may not use this file except in compliance with
00007  * the License. You may obtain a copy of the License at
00008  * http://www.mozilla.org/MPL/
00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is C++ hashtable templates.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Benjamin Smedberg.
00019  * Portions created by the Initial Developer are Copyright (C) 2002
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *
00024  * Alternatively, the contents of this file may be used under the terms of
00025  * either the GNU General Public License Version 2 or later (the "GPL"), or
00026  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00027  * in which case the provisions of the GPL or the LGPL are applicable instead
00028  * of those above. If you wish to allow use of your version of this file only
00029  * under the terms of either the GPL or the LGPL, and not to allow others to
00030  * use your version of this file under the terms of the MPL, indicate your
00031  * decision by deleting the provisions above and replace them with the notice
00032  * and other provisions required by the GPL or the LGPL. If you do not delete
00033  * the provisions above, a recipient may use your version of this file under
00034  * the terms of any one of the MPL, the GPL or the LGPL.
00035  *
00036  * ***** END LICENSE BLOCK ***** */
00037 
00038 #ifndef nsClassHashtable_h__
00039 #define nsClassHashtable_h__
00040 
00041 #include "nsBaseHashtable.h"
00042 #include "nsHashKeys.h"
00043 #include "nsAutoPtr.h"
00044 
00053 template<class KeyClass,class T>
00054 class nsClassHashtable :
00055   public nsBaseHashtable< KeyClass, nsAutoPtr<T>, T* >
00056 {
00057 public:
00058   typedef typename KeyClass::KeyType KeyType;
00059   typedef T* UserDataType;
00060 
00065   PRBool Get(KeyType aKey, UserDataType* pData) const;
00066 };
00067 
00068 
00076 template<class KeyClass,class T>
00077 class nsClassHashtableMT :
00078   public nsBaseHashtableMT< KeyClass, nsAutoPtr<T>, T* >
00079 {
00080 public:
00081   typedef typename KeyClass::KeyType KeyType;
00082   typedef T* UserDataType;
00083 
00088   PRBool Get(KeyType aKey, UserDataType* pData) const;
00089 };
00090 
00091 
00092 //
00093 // nsClassHashtable definitions
00094 //
00095 
00096 template<class KeyClass,class T>
00097 PRBool
00098 nsClassHashtable<KeyClass,T>::Get(KeyType aKey, T** retVal) const
00099 {
00100   typename nsBaseHashtable<KeyClass,nsAutoPtr<T>,T*>::EntryType* ent =
00101     GetEntry(aKey);
00102 
00103   if (ent)
00104   {
00105     if (retVal)
00106       *retVal = ent->mData;
00107 
00108     return PR_TRUE;
00109   }
00110 
00111   if (retVal)
00112     *retVal = nsnull;
00113 
00114   return PR_FALSE;
00115 }
00116 
00117 
00118 //
00119 // nsClassHashtableMT definitions
00120 //
00121 
00122 template<class KeyClass,class T>
00123 PRBool
00124 nsClassHashtableMT<KeyClass,T>::Get(KeyType aKey, T** retVal) const
00125 {
00126   PR_Lock(this->mLock);
00127 
00128   typename nsBaseHashtableMT<KeyClass,nsAutoPtr<T>,T*>::EntryType* ent =
00129     GetEntry(aKey);
00130 
00131   if (ent)
00132   {
00133     if (retVal)
00134       *retVal = ent->mData;
00135 
00136     PR_Unlock(this->mLock);
00137 
00138     return PR_TRUE;
00139   }
00140 
00141   if (retVal)
00142     *retVal = nsnull;
00143 
00144   PR_Unlock(this->mLock);
00145 
00146   return PR_FALSE;
00147 }
00148 
00149 #endif // nsClassHashtable_h__