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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 protocol PBackground;
using class mozilla::TimeStamp from "mozilla/TimeStamp.h";
namespace mozilla {
namespace layout {
/*
* The PVsync is a sub-protocol in PBackground and it is used to notify
* the vsync event from chrome to content process. It also provides the
* interfaces for content to observe/unobserve vsync event notifications.
*/
async protocol PVsync
{
manager PBackground;
child:
// Send vsync event from chrome to content process.
async Notify(TimeStamp aVsyncTimestamp) compress;
// Send the vsync rate to the content process.
async VsyncRate(float aVsyncRate);
parent:
// Content process use these messages to acquire the vsync event.
async Observe();
async Unobserve();
async RequestVsyncRate();
// This message is never sent. Each PVsync actor will stay alive as long as
// its PBackground manager.
async __delete__();
};
} // namespace layout
} // namespace mozilla
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