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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/. */
#include "nsISupports.idl"
/**
* nsIClassOfService.idl
*
* Used to express class dependencies and characteristics - complimentary to
* nsISupportsPriority which is used to express weight
*
* Channels that implement this interface may make use of this
* information in different ways.
*
* The default gecko HTTP/1 stack makes Followers wait for Leaders to
* complete before dispatching followers. Other classes run in
* parallel - neither being blocked nor blocking. All grouping is done
* based on the Load Group - separate load groups proceed
* independently.
*
* HTTP/2 does not use the load group, but prioritization is done per
* HTTP/2 session. HTTP/2 dispatches all the requests as soon as
* possible.
* The various classes are assigned logical priority
* dependency groups and then transactions of that class depend on the
* group. In this model Followers block on Leaders and Speculative
* depends on Background. See Http2Stream.cpp for weighting details.
*
*/
[scriptable, uuid(1ccb58ec-5e07-4cf9-a30d-ac5490d23b41)]
interface nsIClassOfService : nsISupports
{
attribute unsigned long classFlags;
void clearClassFlags(in unsigned long flags);
void addClassFlags(in unsigned long flags);
const unsigned long Leader = 1 << 0;
const unsigned long Follower = 1 << 1;
const unsigned long Speculative = 1 << 2;
const unsigned long Background = 1 << 3;
const unsigned long Unblocked = 1 << 4;
const unsigned long Throttleable = 1 << 5;
const unsigned long UrgentStart = 1 << 6;
};
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