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164 lines
4.6 KiB
C++
164 lines
4.6 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 nsInterfaceHashtable_h__
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#define nsInterfaceHashtable_h__
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#include "nsBaseHashtable.h"
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#include "nsHashKeys.h"
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#include "nsCOMPtr.h"
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/**
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* templated hashtable class maps keys to interface 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 Interface the interface-type being wrapped
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* @see nsDataHashtable, nsClassHashtable
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*/
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template<class KeyClass,class Interface>
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class nsInterfaceHashtable :
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public nsBaseHashtable< KeyClass, nsCOMPtr<Interface> , Interface* >
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{
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public:
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typedef typename KeyClass::KeyType KeyType;
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typedef Interface* UserDataType;
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/**
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* @copydoc nsBaseHashtable::Get
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* @param pData This is an XPCOM getter, so pData is already_addrefed.
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* 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 nsInterfaceHashtable
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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 Interface the interface-type being wrapped
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*/
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template<class KeyClass,class Interface>
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class nsInterfaceHashtableMT :
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public nsBaseHashtableMT< KeyClass, nsCOMPtr<Interface> , Interface* >
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{
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public:
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typedef typename KeyClass::KeyType KeyType;
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typedef Interface* UserDataType;
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/**
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* @copydoc nsBaseHashtable::Get
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* @param pData This is an XPCOM getter, so pData is already_addrefed.
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* 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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// nsInterfaceHashtable definitions
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//
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template<class KeyClass,class Interface>
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PRBool
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nsInterfaceHashtable<KeyClass,Interface>::Get
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(KeyType aKey, UserDataType* pInterface) const
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{
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typename nsBaseHashtable<KeyClass, nsCOMPtr<Interface>, Interface*>::EntryType* ent =
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GetEntry(aKey);
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if (ent)
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{
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if (pInterface)
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{
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*pInterface = ent->mData;
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NS_IF_ADDREF(*pInterface);
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}
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return PR_TRUE;
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}
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// if the key doesn't exist, set *pInterface to null
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// so that it is a valid XPCOM getter
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if (pInterface)
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*pInterface = nsnull;
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return PR_FALSE;
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}
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//
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// nsInterfaceHashtableMT definitions
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//
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template<class KeyClass,class Interface>
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PRBool
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nsInterfaceHashtableMT<KeyClass,Interface>::Get
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(KeyType aKey, UserDataType* pInterface) const
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{
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PR_Lock(this->mLock);
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typename nsBaseHashtableMT<KeyClass, nsCOMPtr<Interface>, Interface*>::EntryType* ent =
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GetEntry(aKey);
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if (ent)
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{
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if (pInterface)
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{
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*pInterface = ent->mData;
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NS_IF_ADDREF(*pInterface);
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}
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PR_Unlock(this->mLock);
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return PR_TRUE;
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}
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// if the key doesn't exist, set *pInterface to null
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// so that it is a valid XPCOM getter
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if (pInterface)
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*pInterface = 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 // nsInterfaceHashtable_h__
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