parser/html/nsHtml5OwningUTF16Buffer.cpp
author Henri Sivonen <hsivonen@iki.fi>
Sat, 29 Oct 2011 23:14:31 +0300
changeset 79402 d1766aec3d7e50e6b00bf80069a6da6d3c567211
parent 78731 daef044609cedf37263d0adb662019bb06c2e84f
child 79404 f5a12d693b5b4a0170c2dcd8f97fd66d23d7a9e4
permissions -rw-r--r--
Bug 696651 part 2 - Establish document.write() insertion position before re-entrant calls can occur. r=Olli.Pettay.

/* ***** 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 HTML Parser C++ Translator code.
 *
 * The Initial Developer of the Original Code is
 * Mozilla Foundation.
 * Portions created by the Initial Developer are Copyright (C) 2008
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Henri Sivonen <hsivonen@iki.fi>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either 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 ***** */

#include "nsHtml5OwningUTF16Buffer.h"

nsHtml5OwningUTF16Buffer::nsHtml5OwningUTF16Buffer(PRUnichar* aBuffer)
  : nsHtml5UTF16Buffer(aBuffer, 0),
    next(nsnull),
    key(nsnull)
{
  MOZ_COUNT_CTOR(nsHtml5OwningUTF16Buffer);
}

nsHtml5OwningUTF16Buffer::nsHtml5OwningUTF16Buffer(void* aKey)
  : nsHtml5UTF16Buffer(nsnull, 0),
    next(nsnull),
    key(aKey)
{
  MOZ_COUNT_CTOR(nsHtml5OwningUTF16Buffer);
}

nsHtml5OwningUTF16Buffer::~nsHtml5OwningUTF16Buffer()
{
  MOZ_COUNT_DTOR(nsHtml5OwningUTF16Buffer);
  DeleteBuffer();
}

// static
already_AddRefed<nsHtml5OwningUTF16Buffer>
nsHtml5OwningUTF16Buffer::FalliblyCreate(PRInt32 aLength)
{
  const mozilla::fallible_t fallible = mozilla::fallible_t();
  PRUnichar* newBuf = new (fallible) PRUnichar[aLength];
  if (!newBuf) {
    return nsnull;
  }
  nsRefPtr<nsHtml5OwningUTF16Buffer> newObj =
    new (fallible) nsHtml5OwningUTF16Buffer(newBuf);
  if (!newObj) {
    delete[] newBuf;
    return nsnull;
  }
  return newObj.forget();
}

void
nsHtml5OwningUTF16Buffer::Swap(nsHtml5OwningUTF16Buffer* aOther)
{
  nsHtml5UTF16Buffer::Swap(aOther);
}


// Not using macros for AddRef and Release in order to be able to refcount on
// and create on different threads.

nsrefcnt
nsHtml5OwningUTF16Buffer::AddRef()
{
  NS_PRECONDITION(PRInt32(mRefCnt) >= 0, "Illegal refcount.");
  ++mRefCnt;
  NS_LOG_ADDREF(this, mRefCnt, "nsHtml5OwningUTF16Buffer", sizeof(*this));
  return mRefCnt;
}

nsrefcnt
nsHtml5OwningUTF16Buffer::Release()
{
  NS_PRECONDITION(0 != mRefCnt, "Release without AddRef.");
  --mRefCnt;
  NS_LOG_RELEASE(this, mRefCnt, "nsHtml5OwningUTF16Buffer");
  if (mRefCnt == 0) {
    mRefCnt = 1; /* stabilize */
    delete this;
    return 0;
  }
  return mRefCnt;
}