/* ***** 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.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2002
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Darin Fisher <darin@netscape.com>
 *
 * 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 "nsIInputStream.idl"

interface nsIInputStreamNotify;
interface nsIEventQueue;

[scriptable, uuid(cc911e09-2a02-4d2d-ba4b-b2afb173e96d)]
interface nsIAsyncInputStream : nsIInputStream
{
    /**
     * This function extends nsIInputStream::close, allowing the caller to
     * specify the reason for closing the stream.  Any future attempts to
     * access the stream (e.g., nsIInputStream::read) will result in an
     * exception with the value given by |reason|.
     *
     * close() is equivalent to closeEx(NS_BASE_STREAM_CLOSED).
     *
     * Any pending asyncWait will be notified.
     */
    void closeEx(in nsresult reason);

    /**
     * Asynchronously wait for the stream to be readable or closed.
     * 
     * @param aNotify
     *        This object is notified when the stream becomes ready.
     * @param aRequestedCount
     *        Wait until at least this many bytes may be read.  This is only
     *        a suggestion to the underlying stream; it may be ignored.
     * @param aEventQ
     *        Specify NULL to receive notification on ANY thread, or specify
     *        that notification be delivered to a specific event queue.  Caller
     *        must pass a "resolved" event queue (see nsIEventQueueService).
     */
    void asyncWait(in nsIInputStreamNotify aNotify,
                   in unsigned long aRequestedCount,
                   in nsIEventQueue aEventQ);
};

[scriptable, uuid(20c665a3-0ebf-4ebb-97ba-794248bfa8fe)]
interface nsIInputStreamNotify : nsISupports
{
    void onInputStreamReady(in nsIAsyncInputStream aStream);
};
