BackgroundChannelRegistrar.h

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/* 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/. */

#ifndef mozilla_net_BackgroundChannelRegistrar_h_

#define mozilla_net_BackgroundChannelRegistrar_h_

#include "mozilla/AlreadyAddRefed.h"

#include "nsIBackgroundChannelRegistrar.h"

#include "nsRefPtrHashtable.h"

namespace mozilla {

namespace net {

class HttpBackgroundChannelParent;

class HttpChannelParent;

class BackgroundChannelRegistrar final : public nsIBackgroundChannelRegistrar {

  using ChannelHashtable =

      nsRefPtrHashtable<nsUint64HashKey, HttpChannelParent>;

  using BackgroundChannelHashtable =

      nsRefPtrHashtable<nsUint64HashKey, HttpBackgroundChannelParent>;

 public:

  NS_DECL_ISUPPORTS

  NS_DECL_NSIBACKGROUNDCHANNELREGISTRAR

  explicit BackgroundChannelRegistrar();

  // Singleton accessors

  static already_AddRefed<BackgroundChannelRegistrar> GetOrCreate();

 private:

  virtual ~BackgroundChannelRegistrar();

  // Like DeleteChannel, but only removes the mChannels entry if it matches

  // aExpected. Use this in preference to DeleteChannel when the caller knows

  // which HttpChannelParent it registered, to avoid accidentally removing an

  // entry belonging to a different object that shares the same channel Id.

  void DeleteChannelIfMatches(uint64_t aKey, HttpChannelParent* aExpected);

  friend class HttpChannelParent;

  // A helper function for BackgroundChannelRegistrar itself to callback

  // HttpChannelParent and HttpBackgroundChannelParent when both objects are

  // ready. aChannelParent and aBgParent is the pair of HttpChannelParent and

  // HttpBackgroundChannelParent that should be linked together.

  void NotifyChannelLinked(HttpChannelParent* aChannelParent,

                           HttpBackgroundChannelParent* aBgParent);

  // Store unlinked HttpChannelParent objects.

  ChannelHashtable mChannels;

  // Store unlinked HttpBackgroundChannelParent objects.

  BackgroundChannelHashtable mBgChannels;

};

}  // namespace net

}  // namespace mozilla

#endif  // mozilla_net_BackgroundChannelRegistrar_h_