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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/. */
#ifndef mozilla_net_EarlyHintRegistrar_h__
#define mozilla_net_EarlyHintRegistrar_h__
#include "mozilla/RefCounted.h"
#include "nsRefPtrHashtable.h"
#include "mozilla/AlreadyAddRefed.h"
class nsIParentChannel;
namespace mozilla::net {
class EarlyHintPreloader;
/*
* Registrar for pairing EarlyHintPreloader and HttpChannelParent via
* earlyHintPreloaderId. EarlyHintPreloader has to be registered first.
* EarlyHintPreloader::OnParentReady will be invoked to notify the
* EarlyHintpreloader about the existence of the associated HttpChannelParent.
*/
class EarlyHintRegistrar final : public RefCounted<EarlyHintRegistrar> {
using EarlyHintHashtable =
nsRefPtrHashtable<nsUint64HashKey, EarlyHintPreloader>;
public:
MOZ_DECLARE_REFCOUNTED_TYPENAME(EarlyHintRegistrar)
EarlyHintRegistrar();
~EarlyHintRegistrar();
/*
* Store EarlyHintPreloader for the HttpChannelParent to connect back to.
*
* @param aEarlyHintPreloaderId identifying the EarlyHintPreloader
* @param aEhp the EarlyHintPreloader to store
*/
void RegisterEarlyHint(uint64_t aEarlyHintPreloaderId,
EarlyHintPreloader* aEhp);
/*
* Link the provided nsIParentChannel with the associated EarlyHintPreloader.
*
* @param aEarlyHintPreloaderId identifying the EarlyHintPreloader
* @param aParent the nsIParentChannel to be paired
* @param aChannelId the id of the nsIChannel connecting to the
* EarlyHintPreloader.
*/
bool LinkParentChannel(uint64_t aEarlyHintPreloaderId,
nsIParentChannel* aParent, uint64_t aChannelId);
/*
* Delete previous stored EarlyHintPreloader
*
* @param aEarlyHintPreloaderId identifying the EarlyHintPreloader
*/
void DeleteEntry(uint64_t aEarlyHintPreloaderId);
/*
* This is called when "profile-change-net-teardown" is observed. We use this
* to cancel the ongoing preload and clear the linked EarlyHintPreloader
* objects.
*/
static void CleanUp();
// Singleton accessor
static already_AddRefed<EarlyHintRegistrar> GetOrCreate();
private:
// Store unlinked EarlyHintPreloader objects.
EarlyHintHashtable mEarlyHint;
};
} // namespace mozilla::net
#endif // mozilla_net_EarlyHintRegistrar_h__
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