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72 lines
2.5 KiB
Plaintext
72 lines
2.5 KiB
Plaintext
/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* 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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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/* This is a utility namespace for promise-debugging functionality */
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dictionary PromiseDebuggingStateHolder {
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PromiseDebuggingState state = "pending";
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any value;
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any reason;
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};
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enum PromiseDebuggingState { "pending", "fulfilled", "rejected" };
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[ChromeOnly, Exposed=(Window,System)]
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interface PromiseDebugging {
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static PromiseDebuggingStateHolder getState(Promise<any> p);
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/**
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* Return the stack to the promise's allocation point. This can
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* return null if the promise was not created from script.
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*/
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static object? getAllocationStack(Promise<any> p);
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/**
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* Return the stack to the promise's rejection point, if the
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* rejection happened from script. This can return null if the
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* promise has not been rejected or was not rejected from script.
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*/
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static object? getRejectionStack(Promise<any> p);
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/**
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* Return the stack to the promise's fulfillment point, if the
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* fulfillment happened from script. This can return null if the
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* promise has not been fulfilled or was not fulfilled from script.
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*/
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static object? getFullfillmentStack(Promise<any> p);
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/**
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* Get the promises directly depending on a given promise. These are:
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*
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* 1) Return values of then() calls on the promise
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* 2) Return values of Promise.all() if the given promise was passed in as one
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* of the arguments.
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* 3) Return values of Promise.race() if the given promise was passed in as
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* one of the arguments.
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*
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* Once a promise is settled, it will generally notify its dependent promises
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* and forget about them, so this is most useful on unsettled promises.
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*
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* Note that this function only returns the promises that directly depend on
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* p. It does not recursively return promises that depend on promises that
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* depend on p.
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*/
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static sequence<Promise<any>> getDependentPromises(Promise<any> p);
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/**
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* Get the number of milliseconds elapsed since the given promise was created.
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*/
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static DOMHighResTimeStamp getPromiseLifetime(Promise<any> p);
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/*
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* Get the number of milliseconds elapsed between the promise being created
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* and being settled. Throws NS_ERROR_UNEXPECTED if the promise has not
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* settled.
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*/
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[Throws]
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static DOMHighResTimeStamp getTimeToSettle(Promise<any> p);
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};
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