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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsISupports.idl"

[ptr] native PRThread(PRThread);

interface nsIThread;

/**
 * An interface for creating and locating nsIThread instances.
 */
[scriptable, uuid(1be89eca-e2f7-453b-8d38-c11ba247f6f3)]
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;
};