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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* 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 "nsIRunnable.idl"
%{C++
#include "mozilla/AlreadyAddRefed.h"
%}
native alreadyAddRefed_nsIRunnable(already_AddRefed<nsIRunnable>);
/*
* The primary use of this interface is to allow any nsISerialEventTarget to
* provide Direct Task dispatching which is similar (but not identical to) the
* microtask semantics of JS promises.
* New direct task may be dispatched when a current direct task is running. In
* which case they will be run in FIFO order.
*/
[uuid(e05bf0fe-94b7-4e28-8462-a8368da9c136)]
interface nsIDirectTaskDispatcher : nsISupports
{
/**
* Dispatch an event for the nsISerialEventTarget, using the direct task
* queue.
*
* This function must be called from the same nsISerialEventTarget
* implementing direct task dispatching.
*
* @param event
* The alreadyAddRefed<> event to dispatch.
*
*/
[noscript] void dispatchDirectTask(in alreadyAddRefed_nsIRunnable event);
/**
* Synchronously run any pending direct tasks queued.
*/
[noscript] void drainDirectTasks();
/**
* Returns true if any direct tasks are pending.
*/
[noscript] bool haveDirectTasks();
%{C++
// Infallible version of the above. Will assert that it is successful.
bool HaveDirectTasks() {
bool value = false;
MOZ_ALWAYS_SUCCEEDS(HaveDirectTasks(&value));
return value;
}
%}
};
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