/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * The contents of this file are subject to the Netscape 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/NPL/
 *
 * 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 Netscape
 * Communications Corporation.  Portions created by Netscape are
 * Copyright (C) 1998 Netscape Communications Corporation. All
 * Rights Reserved.
 *
 * Contributor(s): 
 */

#include "nsISupports.idl"

interface nsIPipe;
interface nsIAllocator;
interface nsIBufferInputStream;
interface nsIBufferOutputStream;

[scriptable, uuid(686b2d98-56c2-11d3-8cd4-0060b0fc14a3)]
interface nsIPipeObserver : nsISupports {
    void onFull(in nsIPipe pipe);
    void onWrite(in nsIPipe pipe, 
                 in unsigned long amount);
    void onEmpty(in nsIPipe pipe);
    void onClose(in nsIPipe pipe);
};

[scriptable, uuid(6c2c0146-56c2-11d3-8cd4-0060b0fc14a3)]
interface nsIPipe : nsISupports {
    void initialize(in unsigned long segmentSize,
                    in unsigned long maxSize,
                    in nsIPipeObserver observer,
                    in nsIAllocator segmentAllocator);
    readonly attribute nsIBufferInputStream inputStream;
    readonly attribute nsIBufferOutputStream outputStream;
    attribute nsIPipeObserver observer;
};

%{C++
#define NS_PIPE_DEFAULT_SEGMENT_SIZE    4096
#define NS_PIPE_DEFAULT_BUFFER_SIZE     (1024*1024)

extern NS_COM nsresult
NS_NewPipe(nsIBufferInputStream* *inStrResult,
           nsIBufferOutputStream* *outStrResult,
           nsIPipeObserver* observer = nsnull,
           PRUint32 segmentSize = NS_PIPE_DEFAULT_SEGMENT_SIZE,
           PRUint32 maxSize = NS_PIPE_DEFAULT_BUFFER_SIZE);
%}