43 lines
1.2 KiB
Plaintext
43 lines
1.2 KiB
Plaintext
/* -*- Mode: C++; 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
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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include protocol PBackground;
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using class mozilla::TimeStamp from "mozilla/TimeStamp.h";
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namespace mozilla {
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namespace layout {
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/*
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* The PVsync is a sub-protocol in PBackground and it is used to notify
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* the vsync event from chrome to content process. It also provides the
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* interfaces for content to observe/unobserve vsync event notifications.
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*/
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async protocol PVsync
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{
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manager PBackground;
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child:
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// Send vsync event from chrome to content process.
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async Notify(TimeStamp aVsyncTimestamp) compress;
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// Send the vsync rate to the content process.
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async VsyncRate(float aVsyncRate);
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parent:
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// Content process use these messages to acquire the vsync event.
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async Observe();
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async Unobserve();
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async RequestVsyncRate();
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// This message is never sent. Each PVsync actor will stay alive as long as
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// its PBackground manager.
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async __delete__();
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};
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} // namespace layout
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} // namespace mozilla
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