/* ***** 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) 2009
 * 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 "nsHtml5TreeOpStage.h"

nsHtml5TreeOpStage::nsHtml5TreeOpStage()
 : mMutex("nsHtml5TreeOpStage mutex")
{
}
    
nsHtml5TreeOpStage::~nsHtml5TreeOpStage()
{
}

void
nsHtml5TreeOpStage::MoveOpsFrom(nsTArray<nsHtml5TreeOperation>& aOpQueue)
{
  mozilla::MutexAutoLock autoLock(mMutex);
  if (mOpQueue.IsEmpty()) {
    mOpQueue.SwapElements(aOpQueue);
  } else {
    mOpQueue.MoveElementsFrom(aOpQueue);
  }
}
    
void
nsHtml5TreeOpStage::MoveOpsAndSpeculativeLoadsTo(nsTArray<nsHtml5TreeOperation>& aOpQueue,
    nsTArray<nsHtml5SpeculativeLoad>& aSpeculativeLoadQueue)
{
  mozilla::MutexAutoLock autoLock(mMutex);
  if (aOpQueue.IsEmpty()) {
    mOpQueue.SwapElements(aOpQueue);
  } else {
    aOpQueue.MoveElementsFrom(mOpQueue);
  }
  if (aSpeculativeLoadQueue.IsEmpty()) {
    mSpeculativeLoadQueue.SwapElements(aSpeculativeLoadQueue);
  } else {
    aSpeculativeLoadQueue.MoveElementsFrom(mSpeculativeLoadQueue);
  }
}

void
nsHtml5TreeOpStage::MoveSpeculativeLoadsFrom(nsTArray<nsHtml5SpeculativeLoad>& aSpeculativeLoadQueue)
{
  mozilla::MutexAutoLock autoLock(mMutex);
  if (mSpeculativeLoadQueue.IsEmpty()) {
    mSpeculativeLoadQueue.SwapElements(aSpeculativeLoadQueue);
  } else {
    mSpeculativeLoadQueue.MoveElementsFrom(aSpeculativeLoadQueue);
  }
}

void
nsHtml5TreeOpStage::MoveSpeculativeLoadsTo(nsTArray<nsHtml5SpeculativeLoad>& aSpeculativeLoadQueue)
{
  mozilla::MutexAutoLock autoLock(mMutex);
  if (aSpeculativeLoadQueue.IsEmpty()) {
    mSpeculativeLoadQueue.SwapElements(aSpeculativeLoadQueue);
  } else {
    aSpeculativeLoadQueue.MoveElementsFrom(mSpeculativeLoadQueue);
  }
}

#ifdef DEBUG
void
nsHtml5TreeOpStage::AssertEmpty()
{
  mozilla::MutexAutoLock autoLock(mMutex);
  // This shouldn't really need the mutex
  NS_ASSERTION(mOpQueue.IsEmpty(), "The stage was supposed to be empty.");
}
#endif