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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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"

%{ C++
namespace mozilla {
namespace net {
class HttpBackgroundChannelParent;
class HttpChannelParent;
}
}
%}

[ptr] native HttpChannelParent(mozilla::net::HttpChannelParent);
[ptr] native HttpBackgroundChannelParent(mozilla::net::HttpBackgroundChannelParent);

/*
 * Registrar for pairing HttpChannelParent and HttpBackgroundChannelParent via
 * channel Id. HttpChannelParent::OnBackgroundParentReady and
 * HttpBackgroundChannelParent::LinkToChannel will be invoked to notify the
 * existence of associated channel object.
 */
[builtinclass, uuid(8acaa9b1-f0c4-4ade-baeb-39b0d4b96e5b)]
interface nsIBackgroundChannelRegistrar : nsISupports
{
  /*
   * Link the provided channel parent actor with the given channel Id.
   * callbacks will be invoked immediately when the HttpBackgroundChannelParent
   * associated with the same channel Id is found. Store the HttpChannelParent
   * until a matched linkBackgroundChannel is invoked.
   *
   * @param aKey the channel Id
   * @param aChannel the channel parent actor to be paired
   */
  [noscript,notxpcom,nostdcall] void linkHttpChannel(in uint64_t aKey,
                                                     in HttpChannelParent aChannel);

  /*
   * Link the provided background channel with the given channel Id.
   * callbacks will be invoked immediately when the HttpChannelParent associated
   * with the same channel Id is found. Store the HttpBackgroundChannelParent
   * until a matched linkHttpChannel is invoked.
   *
   * @param aKey the channel Id
   * @param aBgChannel the background channel to be paired
   */
  [noscript,notxpcom,nostdcall] void linkBackgroundChannel(in uint64_t aKey,
                                                           in HttpBackgroundChannelParent aBgChannel);

  /*
   * Delete previous stored HttpChannelParent or HttpBackgroundChannelParent
   * if no need to wait for the paired channel object, e.g. background channel
   * is destroyed before pairing is completed.
   *
   * @param aKey the channel Id
   */
  [noscript,notxpcom,nostdcall] void deleteChannel(in uint64_t aKey);

};