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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef nsAtomTable_h__
#define nsAtomTable_h__
#include "nsIAtom.h"
/**
* A threadsafely-refcounted implementation of nsIAtom. Note that
* AtomImpl objects are sometimes converted into PermanentAtomImpl
* objects using placement new and just overwriting the vtable pointer.
*/
class AtomImpl : public nsIAtom {
public:
AtomImpl();
protected:
// We don't need a virtual destructor here because PermanentAtomImpl
// deletions aren't handled through Release().
~AtomImpl();
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIATOM
virtual PRBool IsPermanent();
void* operator new(size_t size, const nsACString& aString) CPP_THROW_NEW;
void operator delete(void* ptr) {
::operator delete(ptr);
}
// for |#ifdef NS_BUILD_REFCNT_LOGGING| access to reference count
nsrefcnt GetRefCount() { return mRefCnt; }
// Actually more; 0 terminated. This slot is reserved for the
// terminating zero.
char mString[1];
};
/**
* A non-refcounted implementation of nsIAtom.
*/
class PermanentAtomImpl : public AtomImpl {
public:
#ifdef AIX
PermanentAtomImpl() : AtomImpl() {}
#endif
NS_IMETHOD_(nsrefcnt) AddRef();
NS_IMETHOD_(nsrefcnt) Release();
virtual PRBool IsPermanent();
void* operator new(size_t size, const nsACString& aString) CPP_THROW_NEW {
return AtomImpl::operator new(size, aString);
}
void* operator new(size_t size, AtomImpl* aAtom) CPP_THROW_NEW;
};
void NS_PurgeAtomTable();
#endif // nsAtomTable_h__
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