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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: sw=4 ts=8 et :
*/
/* 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 PPluginInstance;
namespace mozilla {
namespace plugins {
/**
* This protocol exists to allow us to correctly destroy background
* surfaces. The browser owns the surfaces, but shares a "reference"
* with the plugin. The browser needs to notify the plugin when the
* background is going to be destroyed, but it can't rely on the
* plugin to destroy it because the plugin may crash at any time. So
* the plugin instance relinquishes destruction of the its old
* background to actors of this protocol, which can deal with crashy
* corner cases more easily than the instance.
*/
protocol PPluginBackgroundDestroyer {
manager PPluginInstance;
// The ctor message for this protocol serves double-duty as
// notification that that the background is stale.
parent:
async __delete__();
state DESTROYING:
recv __delete__;
};
} // namespace plugins
} // namespace mozilla
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