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/* ***** 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 code.
 *
 * The Initial Developer of the Original Code is Google Inc.
 * Portions created by the Initial Developer are Copyright (C) 2006
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *  Darin Fisher <darin@meer.net>
 *
 * 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
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 * 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 PRThread(PRThread);

interface nsIThread;

/**
 * An interface for creating and locating nsIThread instances.
 */
[scriptable, uuid(2bbbc38c-cf96-4099-ba6b-f6a44d8b014c)]
interface nsIThreadManager : nsISupports
{
  /**
   * Default number of bytes reserved for a thread's stack, if no stack size
   * is specified in newThread(). 0 means use platform default.
   */
  const unsigned long DEFAULT_STACK_SIZE = 0;

  /**
   * Create a new thread (a global, user PRThread).
   *
   * @param creationFlags
   *   Reserved for future use.  Pass 0.
   * @param stackSize
   *   Number of bytes to reserve for the thread's stack.
   *
   * @returns
   *   The newly created nsIThread object.
   */
  nsIThread newThread(in unsigned long creationFlags, [optional] in unsigned long stackSize);

  /**
   * Get the nsIThread object (if any) corresponding to the given PRThread.
   * This method returns null if there is no corresponding nsIThread.
   *
   * @param prthread
   *   The PRThread of the nsIThread being requested.
   *
   * @returns
   *   The nsIThread object corresponding to the given PRThread or null if no
   *   such nsIThread exists.
   */
  [noscript] nsIThread getThreadFromPRThread(in PRThread prthread);

  /**
   * Get the main thread.
   */
  readonly attribute nsIThread mainThread;

  /**
   * Get the current thread.  If the calling thread does not already have a
   * nsIThread associated with it, then a new nsIThread will be created and
   * associated with the current PRThread.
   */
  readonly attribute nsIThread currentThread;

  /**
   * This attribute is true if the calling thread is the main thread of the
   * application process.
   */
  readonly attribute boolean isMainThread;

  /**
   * This attribute is true if the calling thread is the thread on which the
   * cycle collector runs.
   */
  readonly attribute boolean isCycleCollectorThread;
};
