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58 lines
2.2 KiB
Plaintext
58 lines
2.2 KiB
Plaintext
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsISupports.idl"
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/**
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* nsIClassOfService.idl
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*
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* Used to express class dependencies and characteristics - complimentary to
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* nsISupportsPriority which is used to express weight
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*
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* Channels that implement this interface may make use of this
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* information in different ways.
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*
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* The default gecko HTTP/1 stack makes Followers wait for Leaders to
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* complete before dispatching followers. Other classes run in
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* parallel - neither being blocked nor blocking. All grouping is done
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* based on the Load Group - separate load groups proceed
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* independently.
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*
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* HTTP/2 does not use the load group, but prioritization is done per
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* HTTP/2 session. HTTP/2 dispatches all the requests as soon as
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* possible.
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* The various classes are assigned logical priority
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* dependency groups and then transactions of that class depend on the
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* group. In this model Followers block on Leaders and Speculative
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* depends on Background. See Http2Stream.cpp for weighting details.
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*
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*/
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[scriptable, uuid(1ccb58ec-5e07-4cf9-a30d-ac5490d23b41)]
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interface nsIClassOfService : nsISupports
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{
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attribute unsigned long classFlags;
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void clearClassFlags(in unsigned long flags);
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void addClassFlags(in unsigned long flags);
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const unsigned long Leader = 1 << 0;
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const unsigned long Follower = 1 << 1;
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const unsigned long Speculative = 1 << 2;
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const unsigned long Background = 1 << 3;
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const unsigned long Unblocked = 1 << 4;
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const unsigned long Throttleable = 1 << 5;
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const unsigned long UrgentStart = 1 << 6;
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const unsigned long DontThrottle = 1 << 7;
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// Enforce tailing on this load; any of Leader, Unblocked, UrgentStart, TailForbidden
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// overrule this flag (disable tailing.)
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const unsigned long Tail = 1 << 8;
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// Tailing may be engaged regardless if the load is marked Unblocked when
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// some other conditions are met later, like when the load is found to be
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// a tracker.
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const unsigned long TailAllowed = 1 << 9;
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// Tailing not allowed under any circumstances or combination of flags.
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const unsigned long TailForbidden = 1 << 10;
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};
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