зеркало из https://github.com/mozilla/pjs.git
122 строки
3.9 KiB
C++
122 строки
3.9 KiB
C++
/* -*- 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"
|
|
#include "nsStringBuffer.h"
|
|
|
|
/**
|
|
* 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(const nsAString& aString);
|
|
|
|
// This is currently only used during startup when creating a permanent atom
|
|
// from NS_RegisterStaticAtoms
|
|
AtomImpl(nsStringBuffer* aData, PRUint32 aLength);
|
|
|
|
protected:
|
|
// This is only intended to be used when a normal atom is turned into a
|
|
// permanent one.
|
|
AtomImpl() {
|
|
// We can't really assert that mString is a valid nsStringBuffer string,
|
|
// so do the best we can do and check for some consistencies.
|
|
NS_ASSERTION((mLength + 1) * sizeof(PRUnichar) <=
|
|
nsStringBuffer::FromData(mString)->StorageSize() &&
|
|
mString[mLength] == 0,
|
|
"Not initialized atom");
|
|
}
|
|
|
|
// We don't need a virtual destructor here because PermanentAtomImpl
|
|
// deletions aren't handled through Release().
|
|
~AtomImpl();
|
|
|
|
public:
|
|
NS_DECL_ISUPPORTS
|
|
NS_DECL_NSIATOM
|
|
|
|
enum { REFCNT_PERMANENT_SENTINEL = PR_UINT32_MAX };
|
|
|
|
virtual PRBool IsPermanent();
|
|
|
|
// We can't use the virtual function in the base class destructor.
|
|
PRBool IsPermanentInDestructor() {
|
|
return mRefCnt == REFCNT_PERMANENT_SENTINEL;
|
|
}
|
|
|
|
// for |#ifdef NS_BUILD_REFCNT_LOGGING| access to reference count
|
|
nsrefcnt GetRefCount() { return mRefCnt; }
|
|
};
|
|
|
|
/**
|
|
* A non-refcounted implementation of nsIAtom.
|
|
*/
|
|
|
|
class PermanentAtomImpl : public AtomImpl {
|
|
public:
|
|
PermanentAtomImpl(const nsAString& aString)
|
|
: AtomImpl(aString)
|
|
{}
|
|
PermanentAtomImpl(nsStringBuffer* aData, PRUint32 aLength)
|
|
: AtomImpl(aData, aLength)
|
|
{}
|
|
PermanentAtomImpl()
|
|
{}
|
|
|
|
~PermanentAtomImpl();
|
|
NS_IMETHOD_(nsrefcnt) AddRef();
|
|
NS_IMETHOD_(nsrefcnt) Release();
|
|
|
|
virtual PRBool IsPermanent();
|
|
|
|
void* operator new(size_t size, AtomImpl* aAtom) CPP_THROW_NEW;
|
|
void* operator new(size_t size) CPP_THROW_NEW
|
|
{
|
|
return ::operator new(size);
|
|
}
|
|
|
|
};
|
|
|
|
void NS_PurgeAtomTable();
|
|
|
|
#endif // nsAtomTable_h__
|