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150 lines
4.0 KiB
C++
150 lines
4.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is C++ hashtable templates.
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*
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* The Initial Developer of the Original Code is
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* Benjamin Smedberg.
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* Portions created by the Initial Developer are Copyright (C) 2002
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsClassHashtable_h__
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#define nsClassHashtable_h__
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#include "nsBaseHashtable.h"
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#include "nsHashKeys.h"
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#include "nsAutoPtr.h"
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/**
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* templated hashtable class maps keys to C++ object pointers.
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* See nsBaseHashtable for complete declaration.
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* @param KeyClass a wrapper-class for the hashtable key, see nsHashKeys.h
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* for a complete specification.
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* @param Class the class-type being wrapped
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* @see nsInterfaceHashtable, nsClassHashtable
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*/
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template<class KeyClass,class T>
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class nsClassHashtable :
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public nsBaseHashtable< KeyClass, nsAutoPtr<T>, T* >
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{
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public:
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typedef typename KeyClass::KeyType KeyType;
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typedef T* UserDataType;
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/**
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* @copydoc nsBaseHashtable::Get
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* @param pData if the key doesn't exist, pData will be set to nsnull.
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*/
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PRBool Get(KeyType aKey, UserDataType* pData) const;
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};
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/**
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* Thread-safe version of nsClassHashtable
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* @param KeyClass a wrapper-class for the hashtable key, see nsHashKeys.h
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* for a complete specification.
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* @param Class the class-type being wrapped
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* @see nsInterfaceHashtable, nsClassHashtable
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*/
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template<class KeyClass,class T>
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class nsClassHashtableMT :
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public nsBaseHashtableMT< KeyClass, nsAutoPtr<T>, T* >
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{
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public:
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typedef typename KeyClass::KeyType KeyType;
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typedef T* UserDataType;
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/**
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* @copydoc nsBaseHashtable::Get
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* @param pData if the key doesn't exist, pData will be set to nsnull.
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*/
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PRBool Get(KeyType aKey, UserDataType* pData) const;
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};
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//
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// nsClassHashtable definitions
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//
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template<class KeyClass,class T>
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PRBool
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nsClassHashtable<KeyClass,T>::Get(KeyType aKey, T** retVal) const
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{
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typename nsBaseHashtable<KeyClass,nsAutoPtr<T>,T*>::EntryType* ent =
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GetEntry(aKey);
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if (ent)
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{
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if (retVal)
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*retVal = ent->mData;
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return PR_TRUE;
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}
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if (retVal)
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*retVal = nsnull;
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return PR_FALSE;
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}
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//
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// nsClassHashtableMT definitions
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//
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template<class KeyClass,class T>
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PRBool
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nsClassHashtableMT<KeyClass,T>::Get(KeyType aKey, T** retVal) const
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{
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PR_Lock(this->mLock);
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typename nsBaseHashtableMT<KeyClass,nsAutoPtr<T>,T*>::EntryType* ent =
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GetEntry(aKey);
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if (ent)
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{
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if (retVal)
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*retVal = ent->mData;
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PR_Unlock(this->mLock);
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return PR_TRUE;
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}
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if (retVal)
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*retVal = nsnull;
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PR_Unlock(this->mLock);
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return PR_FALSE;
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}
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#endif // nsClassHashtable_h__
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