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