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/* -*- Mode: C++; tab-width: 50; 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
 * mozilla.org
 * Portions created by the Initial Developer are Copyright (C) 2005
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Vladimir Vukicevic <vladimir@pobox.com> (original author)
 *
 * 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 ***** */

#include "nsISupports.idl"

[ptr] native nsNonConstIDPtr(nsID);

/**
 * nsIUUIDGenerator is implemented by a service that can generate
 * universally unique identifiers, ideally using any platform-native
 * method for generating UUIDs.
 */
[scriptable, uuid(138ad1b2-c694-41cc-b201-333ce936d8b8)]
interface nsIUUIDGenerator : nsISupports
{
  /**
   * Obtains a new UUID using appropriate platform-specific methods to
   * obtain a nsID that can be considered to be globally unique.
   *
   * @returns an nsID filled in with a new UUID.
   *
   * @throws NS_ERROR_FAILURE if a UUID cannot be generated (e.g. if
   * an underlying source of randomness is not available)
   */
  nsIDPtr generateUUID();

  /**
   * Obtain a new UUID like the generateUUID method, but place it in
   * the provided nsID pointer instead of allocating a new nsID.
   *
   * @param id an existing nsID pointer where the UUID will be stored.
   *
   * @throws NS_ERROR_FAILURE if a UUID cannot be generated (e.g. if
   * an underlying source of randomness is not available)
   */
  [noscript] void generateUUIDInPlace(in nsNonConstIDPtr id);
};